Journal articles: 'Oxalobacteraceae'

1

Ofek, Maya, Yitzhak Hadar, and Dror Minz. "Ecology of Root Colonizing Massilia (Oxalobacteraceae)." PLoS ONE 7, no. 7 (July 11, 2012): e40117. http://dx.doi.org/10.1371/journal.pone.0040117.

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Gaspar, Helena, Rui Ferreira, Juan Miguel Gonzalez, Maria Ivone da Clara, and Margarida Maria Santana. "Influence of Temperature and Copper on Oxalobacteraceae in Soil Enrichments." Current Microbiology 72, no. 4 (December 17, 2015): 370–76. http://dx.doi.org/10.1007/s00284-015-0960-1.

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Xu, Ping, Wen-Jun Li, Shu-Kun Tang, Yu-Qin Zhang, Guo-Zhong Chen, Hua-Hong Chen, Li-Hua Xu, and Cheng-Lin Jiang. "Naxibacter alkalitolerans gen. nov., sp. nov., a novel member of the family ‘Oxalobacteraceae’ isolated from China." International Journal of Systematic and Evolutionary Microbiology 55, no. 3 (May 1, 2005): 1149–53. http://dx.doi.org/10.1099/ijs.0.63407-0.

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A taxonomic study was performed on strain YIM 31775T, which was isolated from a soil sample collected from Yunnan Province, China. The isolate was chemo-organotrophic, aerobic and Gram-negative. Cells were short rods and motile, with one or more polar flagella. Growth temperature and pH ranged from 4 to 55 °C and 6·5 to 12·0, respectively; the optimum growth temperature and pH were 28–37 °C and 7·0–9·0, respectively. Q-8 was the predominant respiratory lipoquinone. The major fatty acids were C16 : 1 ω7c (42·4 %) and C16 : 0 (28·1 %). The DNA G+C content was 62·4±0·3 mol%. Phylogenetic analysis based on the 16S rRNA gene sequence indicated that strain YIM 31775T should be placed within the family ‘Oxalobacteraceae’, in which it formed a distinct lineage. Based on the high 16S rRNA gene sequence divergence and phenotypic characteristics, it is proposed that strain YIM 31775T should be classified as representing a novel member of the family ‘Oxalobacteraceae’, for which the name Naxibacter alkalitolerans gen. nov., sp. nov. is proposed. The type strain is YIM 31775T (=CCTCC AA 204003T=KCTC 12194T).

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Zhang, De-Chao, Mersiha Redzic, Franz Schinner, and Rosa Margesin. "Glaciimonas immobilis gen. nov., sp. nov., a member of the family Oxalobacteraceae isolated from alpine glacier cryoconite." International Journal of Systematic and Evolutionary Microbiology 61, no. 9 (September 1, 2011): 2186–90. http://dx.doi.org/10.1099/ijs.0.028001-0.

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Strains Cr9-30T and Cr9-12 were isolated from alpine glacier cryoconite. Both strains were Gram-negative-staining, non-motile, rod-shaped and psychrophilic, showing good growth over the temperature range 1–20 °C. Phylogenetic analysis of 16S rRNA gene sequences revealed that the two strains formed a distinct branch within the family Oxalobacteraceae and were most closely related to members of the genus Collimonas. The 16S rRNA gene sequence similarity between strains Cr9-30T and Cr9-12 was 99.0 %. The two strains showed highest 16S rRNA gene sequence pairwise similarity with Collimonas pratensis LMG 23965T (96.6 and 96.1 % for strains Cr9-30T and Cr9-12, respectively), Collimonas arenae LMG 23964T (96.5 and 96.3 %, respectively) and Collimonas fungivorans LMG 21973T (96.4 and 96.2 %, respectively). The predominant cellular fatty acids were summed feature 3 (C16 : 1ω7c and/or iso-C15 : 0 2-OH), C16 : 0 and C18 : 1ω7c. The DNA G+C content of strain Cr9-30T was 51.0 mol%. On the basis of phenotypic characteristics and phylogenetic analysis, strains Cr9-30T and Cr9-12 represent a novel species in a new genus of the family Oxalobacteraceae, for which the name Glaciimonas immobilis gen. nov., sp. nov. is proposed. The type strain of Glaciimonas immobilis is Cr9-30T ( = DSM 23240T = LMG 25547T).

5

Yu, Peng, Xiaoming He, Marcel Baer, Stien Beirinckx, Tian Tian, Yudelsy A. T. Moya, Xuechen Zhang, et al. "Plant flavones enrich rhizosphere Oxalobacteraceae to improve maize performance under nitrogen deprivation." Nature Plants 7, no. 4 (April 2021): 481–99. http://dx.doi.org/10.1038/s41477-021-00897-y.

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Ogawa, Kazutoshi, Yoko Ikeda, and Kazuyuki Umemura. "Structural Studies on a New Water-absorbing Polysaccharide from the Family Oxalobacteraceae." Journal of Applied Glycoscience 54, no. 4 (2007): 203–9. http://dx.doi.org/10.5458/jag.54.203.

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Zhang, Mingqing, Yongming Lv, Shaobin Hou, Yanfei Liu, Yijia Wang, and Xuehua Wan. "Differential Mucosal Microbiome Profiles across Stages of Human Colorectal Cancer." Life 11, no. 8 (August 13, 2021): 831. http://dx.doi.org/10.3390/life11080831.

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Emerging evidences link gut microbiota to colorectal cancer (CRC) initiation and development. However, the CRC stage- and spatial-specific bacterial taxa were less investigated, especially in a Chinese cohort, leading to our incomplete understanding of the functional roles of gut microbiota in promoting CRC progression and recurrence. Here, we report the composition and structure of gut microbiota across CRC stages I, II and III, by analyzing the gut mucosal microbiomes of 75 triplet-paired samples collected from on-tumor, adjacent-tumor and off-tumor sites and 26 healthy controls. We observed tumor-specific pattern of mucosal microbiome profiles as CRC progressed and identified ten bacterial taxa with high abundances (>1%) as potential biomarkers for tumor initiation and development. Peptostreptococcus and Parvimonas can serve as biomarkers for CRC stage I. Fusobacterium, Streptococcus, Parvimonas, Burkholderiales, Caulobacteraceae, Delftia and Oxalobacteraceae can serve as biomarkers for CRC stage II, while Fusobacterium, Burkholderiales, Caulobacteraceae, Oxalobacteraceae, Faecalibacterium and Sutterella can serve as biomarkers for CRC stage III. These biomarkers classified CRC stages I, II and III distinguished from each other with an area under the receiver-operating curve (AUC) > 0.5. Moreover, co-occurrence and co-excluding network analysis of these genera showed strong correlations in CRC stage I, which were subsequently reduced in CRC stages II and III. Our findings provide a reference index for stage-specific CRC diagnosis and suggest stage-specific roles of Peptostreptococcus, Fusobacterium, Streptococcus and Parvimonas in driving CRC progression.

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Bajerski, Felizitas, Lars Ganzert, Kai Mangelsdorf, André Lipski, Hans-Jürgen Busse, Lisa Padur, and Dirk Wagner. "Herbaspirillum psychrotolerans sp. nov., a member of the family Oxalobacteraceae from a glacier forefield." International Journal of Systematic and Evolutionary Microbiology 63, Pt_9 (September 1, 2013): 3197–203. http://dx.doi.org/10.1099/ijs.0.046920-0.

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A novel psychrotolerant, Gram-negative, shiny white, curved-rod-shaped, facultatively anaerobic bacterium PB1T was isolated from a soil sample collected from a glacier forefield of the Larsemann Hills, East Antarctica. Isolate PB1T has catalase and low urease activity and hydrolyses gelatin and starch. Strain PB1T is able to grow between −5 °C and 30 °C with optimum growth at 14–20 °C. Glycerol, dl-arabinose, d-xylose, d-galactose, d-fructose, d-lyxose, d-fucose and potassium gluconate are used as sole carbon sources. The major quinone is ubiquinone Q-8. The major fatty acids (>10 %) for PB1T are C16 : 0 (19.1 %), C16 : 1ω7cis (44.6 %) and C18 : 1ω7cis (16.2 %). The major polyamines are putrescine [54.9 µmol (g dry weight)−1] and 2-hydroxy putrescine [18.5 µmol (g dry weight)−1]. DNA G+C content is 62.5 mol%. Strain PB1T is phylogenetically related to species of the genus Herbaspirillum , with highest 16S rRNA gene sequence similarities to Herbaspirillum canariense (97.3 %), Herbaspirillum aurantiacum (97.2 %), Herbaspirillum soli (97.2 %) and Herbaspirillum frisingense (97.0 %). The DNA–DNA relatedness values were below 30 % between PB1T and the type strains of Herbaspirillum canariense , Herbaspirillum aurantiacum and Herbaspirillum soli . The different geographical origin of strain PB1T from its closest phylogenetic relatives resulted in different phenotypic and genotypic specifications, whereby strain PBT represents a novel species of the genus Herbaspirillum , for which the name Herbaspirillum psychrotolerans is proposed. The type strain is PB1T (DSM 26001T = LMG 27282T).

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Triky-Dotan, Shachaf, Maya Ofek, Miriam Austerweil, Bracha Steiner, Dror Minz, Jaacov Katan, and Abraham Gamliel. "Microbial Aspects of Accelerated Degradation of Metam Sodium in Soil." Phytopathology® 100, no. 4 (April 2010): 367–75. http://dx.doi.org/10.1094/phyto-100-4-0367.

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Preplant soil fumigation with metam sodium is used worldwide to control soilborne diseases. The development of accelerated degradation of pesticides in soil, including metam sodium, results in reduced pesticide efficacy. Therefore, we studied microbial involvement in accelerated degradation of methyl isothiocyanate (MITC) following repeated soil applications of the parent compound, metam sodium. MITC degradation was reduced in soil with a history of metam sodium applications following sterilization, indicating the key role of microorganisms in accelerated degradation. Accelerated degradation of MITC was induced by inoculation of soil with no previous application of metam sodium with soil with a history of metam sodium applications. We developed a method to extract the active microbial fraction responsible for MITC degradation from soil with a history of metam sodium applications. This concentrated soil extract induced accelerated degradation of MITC when added to two different soils with no previous application of metam sodium. An extensive shift in total bacterial community composition in concentrated soil extracts occurred after a single metam sodium application. Two Oxalobacteraceae strains, MDB3 and MDB10, isolated from Rehovot soil following triple application of metam sodium rapidly degraded MITC in soil with no previous application of metam sodium. Polymerase chain reaction–denaturing gradient gel electrophoresis analysis of bacterial community composition showed relative enrichment of MDB3 following metam sodium application, suggesting its potential in situ involvement in accelerated degradation development in Rehovot soil. Responses of resident Oxalobacteraceae community members to metam sodium applications differed between Rehovot and En Tamar soils. Isolate MDB10 did not induce accelerated degradation of MITC in En Tamar soil and, with the slow dissipation of MITC, soil suppressiveness of accelerated degradation is suggested. The isolation and identification of MITC-degrading bacteria might be helpful in developing tools for managing accelerated degradation.

10

Ma, Li, Xiong Min Liu, Dong Gui Li, and Zuo Hui Zhang. "(R)-1-Phenylethanol Production from Racemic 1- Phenylethanol by Double Strains Redox-Coupling." Advanced Materials Research 236-238 (May 2011): 981–85. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.981.

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A strain S307 that can oxidize selectively (S)- 1-phenylethanol to acetophenone and a strain IS 118 that can asymmetric reduce acetophenone to (R)- 1-phenylethanol were isolated from soil. S307 was identified as a species of Undibacterium belonging to the family Oxalobacteraceae of the Betaproteobacteria. S307. IS 118 was identified as Asperillus tamarii. The oxidation of (R, S)-1- phenylethanol with Undibacterium sp. S307 followed by the reduction of the oxidation mixture with Asperillus tamarii IS 118 to afford (R)-1-phenylethanol was described. The effects of redox-coupling patterns on the product of (R)-1-phenylethanol were investigated. After redox-coupling deracemization, the yield and ee of (R)-1-phenylethanol were 87% and 99% respectively.

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Kim, Eun Hye, Hyun-Jeong Jeong, Yoo Kyoung Lee, Eun Young Moon, Jang-Cheon Cho, Hong Kum Lee, and Soon Gyu Hong. "Actimicrobium antarcticum gen. nov., sp. nov., of the Family Oxalobacteraceae, Isolated from Antarctic Coastal Seawater." Current Microbiology 63, no. 2 (June 15, 2011): 213–17. http://dx.doi.org/10.1007/s00284-011-9962-9.

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12

Afonnikova, S. D., A. S. Komissarov, and P. D. Kuchur. "Unique or not unique? Comparative genetic analysis of bacterial O-antigens from the Oxalobacteraceae family." Vavilov Journal of Genetics and Breeding 26, no. 8 (January 5, 2023): 810–18. http://dx.doi.org/10.18699/vjgb-22-98.

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Many plants and animals have symbiotic relationships with microorganisms, including bacteria. The interactions between bacteria and their hosts result in different outcomes for the host organism. The outcome can be neutral, harmful or have beneficial effects for participants. Remarkably, these relationships are not static, as they change throughout an organism’s lifetime and on an evolutionary scale. One of the structures responsible for relationships in bacteria is O-antigen. Depending on the characteristics of its components, the bacteria can avoid the host’s immune response or establish a mutualistic relationship with it. O-antigen is a key component in Gram-negative bacteria’s outer membrane. This component facilitates interaction between the bacteria and host immune system or phages. The variability of the physical structure is caused by the genomic variability of genes encoding O-antigen synthesis components. The genes and pathways of O-polysaccharide (OPS) synthesis were intensively investigated mostly for Enterobacteriaceae species. Considering high genetic and molecular diversity of this structure even between strains, these findings may not have caught the entire variety possibly presented in non-model species. The current study presents a comparative analysis of genes associated with O-antigen synthesis in bacteria of the Oxalobacteraceae family. In contrast to existing studies based on PCR methods, we use a bioinformatics approach and compare O- anti gens at the level of clusters rather than individual genes. We found that the O-antigen genes of these bacteria are represented by several clusters located at a distance from each other. The greatest similarity of the clusters is observed within individual bacterial genera, which is explained by the high variability of O-antigens. The study describes similarities of OPS genes inherent to the family as a whole and also considers individual unique cases of O-antigen genetic variability inherent to individual bacteria.

13

Souza, André L. F., Leda S. Chubatsu, Emanuel M. Souza, Fábio O. Pedrosa, Rose A. Monteiro, Fabiane G. M. Rego, and Liu U. Rigo. "Expression, purification and DNA-binding activities of two putative ModE proteins of Herbaspirillum seropedicae (Burkholderiales, Oxalobacteraceae)." Genetics and Molecular Biology 31, no. 3 (2008): 743–50. http://dx.doi.org/10.1590/s1415-47572008000400022.

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14

Monteiro, Rose A., Maria A. Schmidt, Valter A. de Baura, Eduardo Balsanelli, Roseli Wassem, Marshall G. Yates, Marco A. F. Randi, Fábio O. Pedrosa, and Emanuel M. de Souza. "Early colonization pattern of maize (Zea mays L. Poales, Poaceae) roots by Herbaspirillum seropedicae (Burkholderiales, Oxalobacteraceae)." Genetics and Molecular Biology 31, no. 4 (December 2008): 932–37. http://dx.doi.org/10.1590/s1415-47572008000500021.

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15

Wu, Xuewen, Chun-Zhi Jin, Feng-Jie Jin, Taihua Li, Yun Ju Sung, Hee-Mock Oh, Hyung-Gwan Lee, and Long Jin. "Lacisediminimonas profundi gen. nov., sp. nov., a member of the family Oxalobacteraceae isolated from freshwater sediment." Antonie van Leeuwenhoek 113, no. 2 (September 25, 2019): 253–64. http://dx.doi.org/10.1007/s10482-019-01334-z.

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OGAWA, Kazutoshi, Yoko IKEDA, and Kazuyuki UMEMURA. "NMR Analyses of Oligosaccharides from a New Water-absorbing Polysaccharide Produced by the Family Oxalobacteraceae." YAKUGAKU ZASSHI 129, no. 4 (April 1, 2009): 503–12. http://dx.doi.org/10.1248/yakushi.129.503.

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LOUI, CINDY, GRIGOR GRIGORYAN, HAOHAO HUANG, LEE W. RILEY, and SANGWEI LU. "Bacterial Communities Associated with Retail Alfalfa Sprouts." Journal of Food Protection 71, no. 1 (January 1, 2008): 200–204. http://dx.doi.org/10.4315/0362-028x-71.1.200.

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Fresh produce, including salad, is increasingly implicated in foodborne outbreaks. Although studies have been carried out to detect specific human pathogens from fresh produce, the total bacterial community associated with fresh produce is poorly understood. In this study, we characterized the bacterial community associated with alfalfa sprouts, using a culture-independent method. Four retail-purchased alfalfa sprout samples were obtained from different producers, and the bacterial community associated with each sample was determined by 16S rDNA profiling. Our results indicate that alfalfa sprouts sampled in our study shared significant similarities in their bacterial communities. Proteobacteria was the dominant phylum detected from all alfalfa sprout samples, with Enterobacteriaceae, Oxalobacteraceae, Moraxellaceae, and Sphingomonadaceae as the most frequently detected families. These results indicate that growth conditions of alfalfa sprouts should be taken into consideration to prevent the proliferation of pathogenic proteobacteria such as Escherichia coli O157 and Salmonella.

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Vishnivetskaya, Tatiana A., Craig C. Brandt, Andrew S. Madden, Meghan M. Drake, Joel E. Kostka, Denise M. Akob, Kirsten Küsel, and Anthony V. Palumbo. "Microbial Community Changes in Response to Ethanol or Methanol Amendments for U(VI) Reduction." Applied and Environmental Microbiology 76, no. 17 (July 2, 2010): 5728–35. http://dx.doi.org/10.1128/aem.00308-10.

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ABSTRACT Microbial community responses to ethanol, methanol, and methanol plus humics amendments in relationship to U(VI) bioreduction were studied in laboratory microcosm experiments using sediments and ground water from a uranium-contaminated site in Oak Ridge, TN. The type of carbon source added, the duration of incubation, and the sampling site influenced the bacterial community structure upon incubation. Analysis of 16S rRNA gene clone libraries indicated that (i) bacterial communities found in ethanol- and methanol-amended samples with U(VI) reduction were similar due to the presence of Deltaproteobacteria and Betaproteobacteria (members of the families Burkholderiaceae, Comamonadaceae, Oxalobacteraceae, and Rhodocyclaceae); (ii) methanol-amended samples without U(VI) reduction exhibited the lowest diversity and the bacterial community contained 69.2 to 92.8% of the family Methylophilaceae; and (iii) the addition of humics resulted in an increase of phylogenetic diversity of Betaproteobacteria (Rodoferax, Polaromonas, Janthinobacterium, Methylophilales, and unclassified) and Firmicutes (Desulfosporosinus and Clostridium).

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Green, Stefan J., Frederick C. Michel, Yitzhak Hadar, and Dror Minz. "Contrasting patterns of seed and root colonization by bacteria from the genus Chryseobacterium and from the family Oxalobacteraceae." ISME Journal 1, no. 4 (May 24, 2007): 291–99. http://dx.doi.org/10.1038/ismej.2007.33.

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20

Muller, Daniel, Diliana D. Simeonova, Philippe Riegel, Sophie Mangenot, Sandrine Koechler, Didier Lièvremont, Philippe N. Bertin, and Marie-Claire Lett. "Herminiimonas arsenicoxydans sp. nov., a metalloresistant bacterium." International Journal of Systematic and Evolutionary Microbiology 56, no. 8 (August 1, 2006): 1765–69. http://dx.doi.org/10.1099/ijs.0.64308-0.

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An arsenite-oxidizing bacterium, designated strain ULPAs1T, was isolated from industrial sludge heavily contaminated with arsenic. Cells of this isolate were Gram-negative, curved rods, motile by means of a polar flagellum. The strain was positive for oxidase and catalase activities, was able to reduce nitrate to nitrite, used acetate, lactate and peptone as organic carbon sources under aerobic conditions and was able to oxidize arsenite (As[III]) to arsenate (As[V]). 16S rRNA gene sequence analysis and the absence of dodecanoic fatty acids suggested that this strain represents a member of the genus Herminiimonas of the family Oxalobacteraceae, order Burkholderiales in the Betaproteobacteria. Genomic DNA–DNA hybridization between strain ULPAs1T and Herminiimonas fonticola S-94T and between strain ULPAs1T and Herminiimonas aquatilis CCUG 36956T revealed levels of relatedness of <10 %, well below the recommended 70 % species cut-off value. Thus, strain ULPAs1T (=CCM 7303T=DSM 17148T=LMG 22961T) is the type strain of a novel species of Herminiimonas, for which the name Herminiimonas arsenicoxydans sp. nov. is proposed.

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Ogawa, Kazutoshi, Kazuhide Yamasato, and Yoshimi Maeda. "Preparation and Differential Scanning Calorimetric Studies of a New Water-absorbing Polysaccharide from a Bacterium Belonging to the Family Oxalobacteraceae." Journal of Applied Glycoscience 53, no. 1 (2006): 17–19. http://dx.doi.org/10.5458/jag.53.17.

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22

Zhang, Yan, and Qiang He. "Characterization of bacterial diversity in drinking water by pyrosequencing." Water Supply 13, no. 2 (March 1, 2013): 358–67. http://dx.doi.org/10.2166/ws.2013.037.

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Controlling microbial contamination of drinking water is critical to public health. However, understanding of the microbial ecology of drinking water remains incomplete. Representing the first application of high-throughput sequencing in drinking water microbiology, the objective of this study is to evaluate pyrosequencing as a high-throughput technique for the characterization of bacterial diversity in drinking water in comparison with conventional clone library analysis. Pyrosequencing and clone library analysis were performed in parallel to study the bacterial community composition in drinking water samples following the concentration of microbial biomass in drinking water with ultrafiltration. Validated by clone library analysis, pyrosequencing was confirmed as a highly efficient deep-sequencing technique to characterize the bacterial diversity in drinking water. Sequences of Alphaproteobacteria and Betaproteobacteria dominated the bacterial community in drinking water with Oxalobacteraceae and Methylobacteriaceae as the most abundant bacterial families, which is consistent with the prominent abundance of these populations frequently detected in various freshwater environments where source waters originate. Bacterial populations represented by the most abundant sequences in drinking water were closely related to cultures of metabolically versatile bacterial taxa widely distributed in the environment, suggesting a potential link between environmental distribution, metabolic characteristics, and abundance in drinking water.

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Green, Stefan J., Ehud Inbar, Frederick C. Michel, Yitzhak Hadar, and Dror Minz. "Succession of Bacterial Communities during Early Plant Development: Transition from Seed to Root and Effect of Compost Amendment." Applied and Environmental Microbiology 72, no. 6 (June 2006): 3975–83. http://dx.doi.org/10.1128/aem.02771-05.

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ABSTRACT Compost amendments to soils and potting mixes are routinely applied to improve soil fertility and plant growth and health. These amendments, which contain high levels of organic matter and microbial cells, can influence microbial communities associated with plants grown in such soils. The purpose of this study was to follow the bacterial community compositions of seed and subsequent root surfaces in the presence and absence of compost in the potting mix. The bacterial community compositions of potting mixes, seed, and root surfaces sampled at three stages of plant growth were analyzed via general and newly developed Bacteroidetes-specific, PCR-denaturing gradient gel electrophoresis methodologies. These analyses revealed that seed surfaces were colonized primarily by populations detected in the initial potting mixes, many of which were not detected in subsequent root analyses. The most persistent bacterial populations detected in this study belonged to the genus Chryseobacterium (Bacteroidetes) and the family Oxalobacteraceae (Betaproteobacteria). The patterns of colonization by populations within these taxa differed significantly and may reflect differences in the physiology of these organisms. Overall, analyses of bacterial community composition revealed a surprising prevalence and diversity of Bacteroidetes in all treatments.

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Gathinji, Peter Kiiru, Zabiallah Yousofi, Karin Akada, Ajmal Wali, and Naoki Nishino. "Monitoring the Milk Composition, Milk Microbiota, and Blood Metabolites of Jersey Cows throughout a Lactation Period." Veterinary Sciences 10, no. 3 (March 16, 2023): 226. http://dx.doi.org/10.3390/vetsci10030226.

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This study aimed to determine how milk composition, milk microbiota, and blood metabolites may change during the lactation period in Jersey cows. Milk and jugular blood samples were collected from eight healthy cows every other month from the beginning to the end of their lactation period. Samples of airborne dust were also collected to determine whether the cowshed microbiota could affect milk microbiota. Milk yield peaked in the first two months and gradually decreased as the lactation period progressed. Milk fat, protein, and solids-not-fat contents were low in the first month, and then increased during the middle and late lactation periods. In the first month, plasma non-esterified fatty acids (NEFA), haptoglobin (Hp), and aspartate transaminase (AST) levels were elevated, and high abundances of Burkholderiaceae and Oxalobacteraceae were observed in milk and airborne dust microbiota. The finding that contamination of the environmental microbiota in milk was coupled with elevated plasma NEFA, Hp, and AST levels indicated that impaired metabolic function during the early lactation period may increase the invasion of opportunistic bacteria. This study can affirm the importance of feeding and cowshed management and should provide a helpful addition to improving Jersey cow farming.

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Petrushin, Ivan, Sergei Belikov, and Lubov Chernogor. "Cooperative Interaction of Janthinobacterium sp. SLB01 and Flavobacterium sp. SLB02 in the Diseased Sponge Lubomirskia baicalensis." International Journal of Molecular Sciences 21, no. 21 (October 30, 2020): 8128. http://dx.doi.org/10.3390/ijms21218128.

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Endemic freshwater sponges (demosponges, Lubomirskiidae) dominate in Lake Baikal, Central Siberia, Russia. These sponges are multicellular filter-feeding animals that represent a complex consortium of many species of eukaryotes and prokaryotes. In recent years, mass disease and death of Lubomirskia baicalensis has been a significant problem in Lake Baikal. The etiology and ecology of these events remain unknown. Bacteria from the families Flavobacteriaceae and Oxalobacteraceae dominate the microbiomes of diseased sponges. Both species are opportunistic pathogens common in freshwater ecosystems. The aim of our study was to analyze the genomes of strains Janthinobacterium sp. SLB01 and Flavobacterium sp. SLB02, isolated from diseased sponges to identify the reasons for their joint dominance. Janthinobacterium sp. SLB01 attacks other cells using a type VI secretion system and suppresses gram-positive bacteria with violacein, and regulates its own activity via quorum sensing. It produces floc and strong biofilm by exopolysaccharide biosynthesis and PEP-CTERM/XrtA protein expression. Flavobacterium sp. SLB02 utilizes the fragments of cell walls produced by polysaccharides. These two strains have a marked difference in carbohydrate acquisition. We described a possible means of joint occupation of the ecological niche in the freshwater sponge microbial community. This study expands the understanding of the symbiotic relationship of microorganisms with freshwater Baikal sponges.

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Chung, Ana Paula, Igor Tiago, M. Fernanda Nobre, António Veríssimo, and Paula V. Morais. "Glaciimonas singularis sp. nov., isolated from a uranium mine wastewater treatment plant." International Journal of Systematic and Evolutionary Microbiology 63, Pt_6 (June 1, 2013): 2344–50. http://dx.doi.org/10.1099/ijs.0.046581-0.

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A bacterial strain, A2-57T, recovered from a water sample collected in a uranium mine was taxonomically studied in detail. This strain was a Gram-reaction-negative, rod-shaped bacterium that grew optimally at 25 °C and at pH 6.0–7.0 and had a DNA G+C content of 55.0 mol%. Ubiquinone 8 (UQ-8) was the predominant respiratory quinone and the major fatty acids were C16 : 0, C17 : 0 cyclo, summed feature 3 (C16 : 1ω6c and/or ω7c and/or C15 : 0 iso 2-OH) and C18 : 1ω7c. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain A2-57T belonged to the family Oxalobacteraceae and formed a distinct branch with Glaciimonas immobilis Cr9-30T. Strain A2-57T shared approximately 97.3 % 16S rRNA sequence similarity with G. immobilis Cr9-30T and also showed high sequence similarity with members of the genera Herbaspirillum (96.3–97.0 %) and Collimonas (96.2–97.0 %). Although phylogenetically closely related to the type strain of G. immobilis , the low level of DNA–DNA hybridization between the two strains (21.6 %) and several physiological and biochemical properties indicated that the novel strain could be clearly distinguished from G. immobilis LMG 25547T. Therefore, it is concluded that strain A2-57T represents a novel species of the genus Glaciimonas , for which the name Glaciimonas singularis sp. nov. is proposed. The type strain is A2-57T ( = CIP 110539T = LMG 27070T).

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Ofek, Maya, Yitzhak Hadar, and Dror Minz. "Comparison of Effects of Compost Amendment and of Single-Strain Inoculation on Root Bacterial Communities of Young Cucumber Seedlings." Applied and Environmental Microbiology 75, no. 20 (August 21, 2009): 6441–50. http://dx.doi.org/10.1128/aem.00736-09.

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ABSTRACT Compost amendment and inoculations with specific microorganisms are fundamentally different soil treatment methods, commonly used in agriculture for the improvement of plant growth and health. Although distinct, both methods affect the rhizosphere and the plant roots. In the present study we used a 16S rRNA gene approach to achieve an overview of early consequences of these treatments on the assemblage of plant root bacterial communities. For this purpose, cucumber seedlings were grown, under controlled conditions, in perlite potting mix amended with biosolid compost or straw compost, or inoculated with Streptomyces spp. A uniform trend of response of root bacterial communities for all treatments was observed. Root bacterial density, measured as bacterial targets per plant tef gene by real-time PCR, was reduced in 31 to 67%. In addition, increased taxonomic diversity accompanied shifts in composition (α-diversity). The magnitude of change in these parameters relative to the perlite control varied between the different treatments but not in relation to the treatment method (compost amendments versus inoculations). Similarity between the compositions of root and of potting mix bacterial communities (β-diversity) was relatively unchanged. The abundance of Oxalobacteraceae was >50% of the total root bacterial community in the untreated perlite. Root domination by this group subsided >10-fold (straw compost) to >600-fold (Streptomyces sp. strain S1) after treatment. Thus, loss of dominance appears to be the major phenomenon underlining the response trend of the root bacterial communities.

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Yin, Sheng, Mingquan Huang, Jiaxuan Wang, Bo Liu, and Qing Ren. "Microbial Community Dynamics and the Correlation between Specific Bacterial Strains and Higher Alcohols Production in Tartary Buckwheat Huangjiu Fermentation." Foods 12, no. 14 (July 11, 2023): 2664. http://dx.doi.org/10.3390/foods12142664.

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Tartary buckwheat is a healthy grain rich in nutrients and medicinal ingredients and consequently is commonly used for Huangjiu brewing. In order to reveal the correlation between microbial succession and higher alcohols production, in this study, Huangjiu fermentation was conducted using Tartary buckwheat as the raw material and wheat Qu as the starter culture. Microbial community dynamics analysis indicated that the bacterial diversity initially decreased rapidly to a lower level and then increased and maintained at a higher level during fermentation. Lactococcus was the dominant bacteria and Ralstonia, Acinetobacter, Cyanobacteria, and Oxalobacteraceae were the bacterial genera with higher abundances. In sharp contrast, only 13 fungal genera were detected during fermentation, and Saccharomyces showed the dominant abundance. Moreover, 18 higher alcohol compounds were detected by GC-MS during fermentation. Four compounds (2-phenylethanol, isopentanol, 1-hexadecanol, and 2-phenoxyethanol) were stably detected with high concentrations during fermentation. The compound 2-ethyl-2-methyl-tridecanol was detected to be of the highest concentration in the later period of fermentation. Correlation analysis revealed that the generation of 2-phenylethanol, isopentanol, 1-hexadecanol, and 2-phenoxyethanol were positively correlated with Granulicatella and Pelomonas, Bacteroides, Pseudonocardia and Pedomicrobium, and Corynebacterium, respectively. The verification fermentation experiments indicated that the improved wheat Qu QT3 and QT4 inoculated with Granulicatella T3 and Acidothermus T4 led to significant increases in the contents of 2-phenylethanol and pentanol, as well as isobutanol and isopentanol, respectively, in the Tartary buckwheat Huangjiu. The findings benefit understanding of higher alcohols production and flavor formation mechanisms in Huangjiu fermentation.

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Goforth, Madison, Margarethe A. Cooper, Andrew S. Oliver, Janneth Pinzon, Mariya Skots, Victoria Obergh, Trevor V. Suslow, et al. "Bacterial community shifts of commercial apples, oranges, and peaches at different harvest points across multiple growing seasons." PLOS ONE 19, no. 4 (April 16, 2024): e0297453. http://dx.doi.org/10.1371/journal.pone.0297453.

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Assessing the microbes present on tree fruit carpospheres as the fruit enters postharvest processing could have useful applications, as these microbes could have a major influence on spoilage, food safety, verification of packing process controls, or other aspects of processing. The goal of this study was to establish a baseline profile of bacterial communities associated with apple (pome fruit), peach (stone fruit), and Navel orange (citrus fruit) at harvest. We found that commercial peaches had the greatest bacterial richness followed by oranges then apples. Time of harvest significantly changed bacterial diversity in oranges and peaches, but not apples. Shifts in diversity varied by fruit type, where 70% of the variability in beta diversity on the apple carposphere was driven by the gain and loss of species (i.e., nestedness). The peach and orange carposphere bacterial community shifts were driven by nearly an even split between turnover (species replacement) and nestedness. We identified a small core microbiome for apples across and between growing seasons that included only Methylobacteriaceae and Sphingomonadaceae among the samples, while peaches had a larger core microbiome composed of five bacterial families: Bacillaceae, Geodermtophilaceae, Nocardioidaceae, Micrococcaeceae, and Trueperaceae. There was a relatively diverse core microbiome for oranges that shared all the families present on apples and peaches, except for Trueperaceae, but also included an additional nine bacterial families not shared including Oxalobacteraceae, Cytophagaceae, and Comamonadaceae. Overall, our findings illustrate the important temporal dynamics of bacterial communities found on major commercial tree fruit, but also the core bacterial families that constantly remain with both implications being important entering postharvest packing and processing.

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Luo, Songping, Binghui He, Dandan Song, Tianyang Li, Yaopeng Wu, and Lei Yang. "Response of Bacterial Community Structure to Different Biochar Addition Dosages in Karst Yellow Soil Planted with Ryegrass and Daylily." Sustainability 12, no. 5 (March 9, 2020): 2124. http://dx.doi.org/10.3390/su12052124.

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Biochar has been widely used to ameliorate soil quality and increase crop productivity through enhancement of nutrient availability and microbial community. The Karst yellow soil in China is characterized by severe soil degradation owing to intensive nutrient leaching. However, the biochar addition effects on the changes of Karst yellow soil are unclear, and the adequate number of biochar dosages to explain optimum of plant growth in this soil area remains poorly understood. In this study, pot experiments were conducted to examine the effects of biochar addition (1%, 3%, 5%, 7%, and 9% by weight; 0% as a control) on bacterial abundance and community structure via high-throughput sequencing coupled with bioinformatics methods applied to Karst yellow soil with planting ryegrass (Lolium perenne L.) and daylily (Hemerocallis fulva). After adding biochar for 188 days, significantly increased pH, soil organic matter, total nutrient contents, and bacterial abundance, but decreased available nitrogen, were observed. Changed bacterial community structures were found in biochar treatments compared with those without biochar. In both soils of planted ryegrass and daylily, the optimum soil bacterial abundance was found in 7% biochar dosage, but the lowest values were in the controls (0%). Taxonomic analysis identified that Micrococcaceae (24.53%), Oxalobacteraceae (11.87%), and Nocardioidaceae (7.89%) were the dominant family in the soil of ryegrass growth, and Micrococcaceae (16.20%), Xanthomonadaceae (6.94%), and Nocardioidaceae (6.41%) were the dominant family in soil of daylily growth. Canonical correspondence analysis showed that the alterations of soil bacterial abundance and community were highly interrelated with soil chemical properties. The results provided a better understanding of the mechanisms underlying the plant-soil microbe interactions and their responses to biochar dosages in low fertility soil regions.

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Torok, Valeria A., Gwen E. Allison, Nigel J. Percy, Kathy Ophel-Keller, and Robert J. Hughes. "Influence of Antimicrobial Feed Additives on Broiler Commensal Posthatch Gut Microbiota Development and Performance." Applied and Environmental Microbiology 77, no. 10 (March 25, 2011): 3380–90. http://dx.doi.org/10.1128/aem.02300-10.

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ABSTRACTThe effects of avilamycin, zinc bacitracin, and flavophospholipol on broiler gut microbial community colonization and bird performance in the first 17 days posthatch were investigated. Significant differences in gut microbiota associated with gut section, dietary treatment, and age were identified by terminal restriction fragment length polymorphism (T-RFLP), although no performance-related differences between dietary treatments were detected. Similar age-related shifts in the gut microbiota were identified regardless of diet but varied between the ilea and ceca. Interbird variabilities in ileal bacterial communities were reduced (3 to 7 days posthatch) in chicks fed with feed containing antimicrobial agents. Avilamycin and flavophospholipol had the most consistent effect on gut microbial communities. Operational taxonomic units (OTU) linked to changes in gut microbiota in birds on antimicrobial-supplemented diets were characterized and identified. Some OTUs could be identified to the species level; however, the majority could be only tentatively classified to the genus, family, order, or domain level. OTUs 140 to 146 (Lachnospiraceae), OTU 186/188 (Lactobacillus johnsonii), OTU 220 (Lachnospiraceae), OTUs 284 to 288 (unclassified bacterial spp. orRuminococcaceae), OTU 296/298 (unclassified bacterium orClostridiales), and OTU 480/482 (Oxalobacteraceae) were less prevalent in the guts of chicks fed antimicrobial-supplemented diets. OTU 178/180 (Lactobacillus crispatus), OTU 152 (Lactobacillus reuterior unclassifiedClostridiales), OTU 198/200 (Subdoligranulumspp.), and OTU 490/492 (unclassified bacterium orEnterobacteriaceae) were less prevalent in the gut of chicks raised on the antimicrobial-free diet. The identification of key bacterial species influenced by antimicrobial-supplemented feed immediately posthatch may assist in the formulation of diets that facilitate beneficial gut microbial colonization and, hence, the development of alternatives to current antimicrobial agents in feed for sustainable poultry production.

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Kämpfer, Peter, Ramon Rosselló-Mora, Malte Hermansson, Frank Persson, Birgit Huber, Enevold Falsen, and Hans-Jürgen Busse. "Undibacterium pigrum gen. nov., sp. nov., isolated from drinking water." International Journal of Systematic and Evolutionary Microbiology 57, no. 7 (July 1, 2007): 1510–15. http://dx.doi.org/10.1099/ijs.0.64785-0.

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Two Gram-negative, rod-shaped, oxidase-positive, non-spore-forming, non-motile bacteria (strains CCUG 49009T and CCUG 49012), both isolated from drinking water, were characterized. On the basis of chemotaxonomic data [major ubiquinone, Q-8; predominant polyamines, putrescine and 2-hydroxyputrescine; major polar lipids, phosphatidylethanolamine, moderate amounts of diphosphatidylglycerol and phosphatidylglycerol and minor amounts of three aminolipids and phosphatidylserine; major fatty acids, C16 : 0 and summed feature 3 (C16 : 1 ω7c/C15 : 0 iso 2-OH)] and 16S rRNA gene sequence similarities, both strains clearly belong to the family Oxalobacteraceae of the Betaproteobacteria. 16S rRNA gene sequence similarities with members of the most closely related genera of this group (Herminiimonas, Massilia, Duganella, Telluria, Herbaspirillum, Janthinobacterium, Naxibacter and Paucimonas) were less than 96.5 % for both strains. The two strains also shared a relatively low 16S rRNA gene sequence similarity (96.8 %). Although phylogenetic analysis based on 16S rRNA gene sequence similarities clearly showed that the two organisms formed a separate branch, their phenotypes (including chemotaxonomic features) were hardly distinguishable and showed high similarities to those reported for the most closely related genera. On the basis of DNA–DNA hybridization results, the two strains were shown to represent separate species (sharing only 20 % DNA–DNA relatedness), but they could not be clearly differentiated phenotypically from each other. It is evident that these organisms represent a new genus, Undibacterium gen. nov., with one species, Undibacterium pigrum sp. nov. The type strain of Undibacterium pigrum is strain CCUG 49009T (=CIP 109318T). Strain CCUG 49012 (=CIP 108976) probably represents a second species of this genus, but is described here as a second genomovar of this species because of the lack of differentiating characters.

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Finnicum, Casey T., Stieneke Doornweerd, Conor V. Dolan, Justin M. Luningham, Jeffrey J. Beck, Gonneke Willemsen, Erik A. Ehli, et al. "Metataxonomic Analysis of Individuals at BMI Extremes and Monozygotic Twins Discordant for BMI." Twin Research and Human Genetics 21, no. 3 (May 24, 2018): 203–13. http://dx.doi.org/10.1017/thg.2018.26.

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Objective: The human gut microbiota has been demonstrated to be associated with a number of host phenotypes, including obesity and a number of obesity-associated phenotypes. This study is aimed at further understanding and describing the relationship between the gut microbiota and obesity-associated measurements obtained from human participants. Subjects/Methods: Here, we utilize genetically informative study designs, including a four-corners design (extremes of genetic risk for BMI and of observed BMI; N = 50) and the BMI monozygotic (MZ) discordant twin pair design (N = 30), in order to help delineate the role of host genetics and the gut microbiota in the development of obesity. Results: Our results highlight a negative association between BMI and alpha diversity of the gut microbiota. The low genetic risk/high BMI group of individuals had a lower gut microbiota alpha diversity when compared to the other three groups. Although the difference in alpha diversity between the lean and heavy groups of the BMI-discordant MZ twin design did not achieve significance, this difference was observed to be in the expected direction, with the heavier participants having a lower average alpha diversity. We have also identified nine OTUs observed to be associated with either a leaner or heavier phenotype, with enrichment for OTUs classified to the Ruminococcaceae and Oxalobacteraceae taxonomic families. Conclusion: Our study presents evidence of a relationship between BMI and alpha diversity of the gut microbiota. In addition to these findings, a number of OTUs were found to be significantly associated with host BMI. These findings may highlight separate subtypes of obesity, one driven by genetic factors, the other more heavily influenced by environmental factors.

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Wang, Yijun, Yu Xu, Lihua Jiang, Yan Yang, Jing Shi, Xilin Guan, Tao Sun, Huanyu Zhao, Yafei Wang, and Yumin Liu. "Effect of Mild Organic Substitution on Soil Quality and Microbial Community." Agronomy 14, no. 5 (April 24, 2024): 888. http://dx.doi.org/10.3390/agronomy14050888.

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Mild organic substitution is advantageous for sustainable agricultural development. In order to determine the proper fertilization strategy, it is essential to investigate the impact of substituting chemical fertilizers with varying levels of organic manure on soil nutrients, microbial communities, and crop productivity. Four treatments were implemented: no fertilizer, sole chemical fertilizer, 20% organic manure substitution, and 40% organic manure substitution. Bacterial and fungal communities were characterized through high-throughput sequencing of the 16S rRNA gene V3–V4 region and the V4 region, respectively. The 20% and 40% organic manure substitutions increased soil organic matter (SOM) content, total nitrogen (TN) content, and reduced soil pH compared to the control (CK). The 20% organic manure substitution showed the most significant improvements in soil alkaline phosphatase, urease, and invertase activities. Soil nutrient enhancement increased bacterial alpha diversity, with a milder impact on fungal alpha diversity compared to bacteria. Different fertilization treatments elevated the relative abundance of bacterial Bacteroidetes (8.11%, 21.25%, and 1.88%), Actinomycetes (12.65%, 26.36%, and 15.33%), and fungal Ascomycota (16.19%, 10.44%, and 12.69%), known for degrading recalcitrant organic matter. The sole chemical fertilizer treatment increased the pathogenic Cheatotryiales. Shared species, primarily from bacterial Actinomycetes, Firmicutes, Proteobacteria, and fungal Ascomycota phyla, were found at 20% and 40% organic manure substitution levels. Specifically, the 20% organic manure substitution level promoted the relative abundance of beneficial plant growth-promoting taxa, Oxalobacteraceae and Massilia, and suppressed pathogens, with an increase in the relative abundance of the Purpureocillium genus and Mortierellomycota. These findings suggest that a 20% OF substitution can maintain crop yield, enhance soil nutrients and enzyme activities by fostering beneficial soil bacteria, inhibiting soil-borne pathogens, and refining microbial community structure.

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Vimercati, Lara, Clifton P. Bueno de Mesquita, and Steven K. Schmidt. "Limited Response of Indigenous Microbes to Water and Nutrient Pulses in High-Elevation Atacama Soils: Implications for the Cold–Dry Limits of Life on Earth." Microorganisms 8, no. 7 (July 16, 2020): 1061. http://dx.doi.org/10.3390/microorganisms8071061.

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Soils on the world’s highest volcanoes in the Atacama region represent some of the harshest ecosystems yet discovered on Earth. Life in these environments must cope with high UV flux, extreme diurnal freeze–thaw cycles, low atmospheric pressure and extremely low nutrient and water availability. Only a limited spectrum of bacterial and fungal lineages seems to have overcome the harshness of this environment and may have evolved the ability to function in situ. However, these communities may lay dormant for most of the time and spring to life only when enough water and nutrients become available during occasional snowfalls and aeolian depositions. We applied water and nutrients to high-elevation soils (5100 meters above sea level) from Volcán Llullaillaco, both in lab microcosms and in the field, to investigate how microbial communities respond when resource limitations are alleviated. The dominant taxon in these soils, the extremophilic yeast Naganishia sp., increased in relative sequence abundance and colony-forming unit counts after water + nutrient additions in microcosms, and marginally in the field after only 6 days. Among bacteria, only a Noviherbaspirillum sp. (Oxalobacteraceae) significantly increased in relative abundance both in the lab and field in response to water addition but not in response to water and nutrients together, indicating that it might be an oligotroph uniquely suited to this extreme environment. The community structure of both bacteria and eukaryotes changed significantly with water and water + nutrient additions in the microcosms and taxonomic richness declined with amendments to water and nutrients. These results indicate that only a fraction of the detected community is able to become active when water and nutrients limitations are alleviated in lab microcosms, and that water alone can dramatically change community structure. Our study sheds light on which extremophilic organisms are likely to respond when favorable conditions occur in extreme earthly environments and perhaps in extraterrestrial environments as well.

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Kourkoutas, Y., P. Kandylis, P. Panas, J. S. G. Dooley, P. Nigam, and A. A. Koutinas. "Evaluation of Freeze-Dried Kefir Coculture as Starter in Feta-Type Cheese Production." Applied and Environmental Microbiology 72, no. 9 (September 2006): 6124–35. http://dx.doi.org/10.1128/aem.03078-05.

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ABSTRACT The use of freeze-dried kefir coculture as a starter in the production of feta-type cheese was investigated. Maturation of the produced cheese at 4ï¿½C was monitored for up to 70 days, and the effects of the starter culture, the salting method, and the ripening process on quality characteristics were studied. The use of kefir coculture as a starter led to increased lactic acid concentrations and decreased pH values in the final product associated with significantly higher conversion rates compared to salted rennet cheese. Determination of bacterial diversity at the end of the ripening process in salted kefir and rennet cheeses by denaturing gradient gel electrophoresis technology, based on both DNA and RNA analyses, suggested a potential species-specific inhibition of members of the genera Staphylococcus and Psychrobacter by kefir coculture. The main active microbial associations in salted kefir cheese appeared to be members of the genera Pseudomonas and Lactococcus, while in salted rennet cheese, Oxalobacteraceae, Janthinobacterium, Psychrobacter, and Pseudomonas species were noted. The effect of the starter culture on the production of aroma-related compounds responsible for cheese flavor was also studied by the solid-phase microextraction-gas chromatography-mass spectrometry technique. Kefir coculture also appeared to extend the shelf life of unsalted cheese. Spoilage of kefir cheese was observed on the 9th and 20th days of preservation at 10 and 5ï¿½C, respectively, while spoilage in the corresponding rennet cheese was detected on the 7th and 16th days. Microbial counts during preservation of both types of unsalted cheese increased steadily and reached similar levels, with the exception of staphylococci, which were significantly lower in unsalted kefir cheese. All types of cheese produced with kefir as a starter were approved and accepted by the panel during the preliminary sensory evaluation compared to commercial feta-type cheese.

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de Boer, Wietse, Johan H. J. Leveau, George A. Kowalchuk, Paulien J. A. Klein Gunnewiek, Edwin C. A. Abeln, Marian J. Figge, Klaas Sjollema, Jaap D. Janse, and Johannes A. van Veen. "Collimonas fungivorans gen. nov., sp. nov., a chitinolytic soil bacterium with the ability to grow on living fungal hyphae." International Journal of Systematic and Evolutionary Microbiology 54, no. 3 (May 1, 2004): 857–64. http://dx.doi.org/10.1099/ijs.0.02920-0.

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A polyphasic approach was used to describe the phylogenetic position of 22 chitinolytic bacterial isolates that were able to grow at the expense of intact, living hyphae of several soil fungi. These isolates, which were found in slightly acidic dune soils in the Netherlands, were strictly aerobic, Gram-negative rods. Cells grown in liquid cultures were flagellated and possessed pili. A wide range of sugars, alcohols, organic acids and amino acids could be metabolized, whereas several di- and trisaccharides could not be used as substrates. The major cellular fatty acids were C16 : 0, C16 : 1 ω7c and C18 : 1 ω7c. DNA G+C contents were 57–62 mol%. Analysis of nearly full-length 16S rDNA sequences showed that the isolates were related closely to each other (>98·6 % sequence similarity) and could be assigned to the β-Proteobacteria, family ‘Oxalobacteraceae’, order ‘Burkholderiales’. The most closely related species belonged to the genera Herbaspirillum and Janthinobacterium, exhibiting 95·9–96·7 % (Herbaspirillum species) and 94·3–95·6 % (Janthinobacterium species) 16S rDNA sequence similarity to the isolates. Several physiological and biochemical properties indicated that the isolates could be distinguished clearly from both of these genera. Therefore, it is proposed that the isolates described in this study are representatives of a novel genus, Collimonas gen. nov. Genomic fingerprinting (BOX-PCR), detailed analysis of 16S rDNA patterns and physiological characterization (Biolog) of the isolates revealed the existence of four subclusters. The name Collimonas fungivorans gen. nov., sp. nov. has been given to one subcluster (four isolates) that appears to be in the centre of the novel genus; isolates in the other subclusters have been tentatively named Collimonas sp. The type strain of Collimonas fungivorans gen. nov., sp. nov. is Ter6T (=NCCB 100033T=LMG 21973T).

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Offre, P., B. Pivato, S. Siblot, E. Gamalero, T. Corberand, P. Lemanceau, and C. Mougel. "Identification of Bacterial Groups Preferentially Associated with Mycorrhizal Roots of Medicago truncatula." Applied and Environmental Microbiology 73, no. 3 (December 1, 2006): 913–21. http://dx.doi.org/10.1128/aem.02042-06.

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ABSTRACT The genetic structures of bacterial communities associated with Medicago truncatula Gaertn. cv. Jemalong line J5 (Myc+ Nod+) and its symbiosis-defective mutants TRV48 (Myc+ Nod−) and TRV25 (Myc− Nod−) were compared. Plants were cultivated in a fertile soil (Chï¿½teaurenard, France) and in soil from the Mediterranean basin showing a low fertility (Mas d'Imbert, France). Plant growth, root architecture, and the efficiency of root symbiosis of the three plant genotypes were characterized in the two soils. Structures of the bacterial communities were assessed by automated-ribosomal intergenic spacer analysis (A-RISA) fingerprinting from DNA extracted from the rhizosphere soil and root tissues. As expected, the TRV25 mutant did not develop endomycorrhizal symbiosis in any of the soils, whereas mycorrhization of line J5 and the TRV48 mutant occurred in both soils but at a higher intensity in the Mas d'Imbert (low fertility) than in the Chï¿½teaurenard soil. However, modifications of plant growth and root architecture, between mycorrhizal (J5 and TRV48) and nonmycorrhizal (TRV25) plants, were recorded only when cultivated in the Mas d'Imbert soil. Similarly, the genetic structures of bacterial communities associated with mycorrhizal and nonmycorrhizal plants differed significantly in the Mas d'Imbert soil but not in the Chï¿½teaurenard soil. Multivariate analysis of the patterns allowed the identification of molecular markers, explaining these differences, and markers were further sequenced. Molecular marker analysis allowed the delineation of 211 operational taxonomic units. Some of those belonging to the Comamonadaceae and Oxalobacteraceae (β-Proteobacteria) families were found to be significantly more represented within bacterial communities associated with the J5 line and the TRV48 mutant than within those associated with the TRV25 mutant, indicating that these bacterial genera were preferentially associated with mycorrhizal roots in the Mas d'Imbert soil.

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Kim, Min-Soo, Jin-Woo Bae, and Eun-Jin Park. "Geographic and Host-Associated Variations in Bacterial Communities on the Floret Surfaces of Field-Grown Broccoli." Applied and Environmental Microbiology 84, no. 8 (February 2, 2018): e02837-17. http://dx.doi.org/10.1128/aem.02837-17.

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ABSTRACT Fresh vegetables harbor diverse bacterial populations on their surfaces. However, information on this microbiota is limited to a few types of fresh vegetables, and little is known about how it varies with geography and host condition. Here, we analyzed bacterial communities on the floret surfaces of 66 field-grown broccoli collected from 22 farms in four farming regions of Jeju Island, South Korea, using 454 pyrosequencing of 16S rRNA amplicons, and we determined their relationships to farming region and host-associated factors. Geographic variations in bacterial community composition and diversity were observed among farming regions, which partly reflected their relative humidity and insolation. The most abundant phyla were Proteobacteria, followed by Actinobacteria, Firmicutes, and Bacteroidetes; core operational taxonomic units (OTUs) assigned to Pseudomonas, Acinetobacter, Oxalobacteraceae, Comamonadaceae, and Enterobacteriaceae contributed to the community differences. Bacterial community composition differed between immature and mature samples, with mature samples harboring higher bacterial diversity. In comparison with communities on other types of fresh vegetables and fruits, bacterial communities on broccoli florets were unique but more similar to those of ground vegetables than to those of tree fruits/vegetables. This study presents novel data on the variability of floret-associated bacterial populations of field-grown broccoli relative to environmental and host-associated factors.IMPORTANCE Fresh vegetables harbor diverse and complex bacterial populations on their surfaces. These indigenous bacteria may play a role in human and crop health; however, the diversity and variability of bacterial communities on fresh vegetables require further study. A popular crop of leafy vegetables, broccoli, is of great agricultural and industrial importance. This study provides a detailed description of the bacterial community composition and diversity on the surfaces of broccoli florets. The variability of bacterial communities is associated with the geographic location of farming sites and is affected by host growth and health. The bacterial communities specific to broccoli were identified and showed greater similarity to those found on ground vegetables than to those found on tree fruits/vegetables. This study presents novel data on the impact of environmental and host-associated conditions on the variability of floret-associated bacterial populations present on field-grown broccoli.

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Lu, Huibin, Tongchu Deng, Feifei Liu, Yonghong Wang, Xunan Yang, and Meiying Xu. "Duganella albus sp. nov., Duganella aquatilis sp. nov., Duganella pernnla sp. nov. and Duganella levis sp. nov., isolated from subtropical streams in China." International Journal of Systematic and Evolutionary Microbiology 70, no. 6 (June 1, 2020): 3801–8. http://dx.doi.org/10.1099/ijsem.0.004234.

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Six Gram-stain-negative, catalase- and oxidase-positive, rod-shaped and motile strains (FT9WT, FT25W, FT26WT, FT109WT, FT134W and CY42WT) were isolated from subtropical streams in China. Comparisons based on 16S rRNA gene sequences showed that the six strains shared similarities of less than 98.1 % with other species within the family Oxalobacteraceae and formed two separately distinct clades in phylogenetic trees. The 16S rRNA gene sequence similarities between strains FT9WT and FT25W, and between strains FT109WT and FT134W were both 99.7 %. The genome sizes of strains FT9WT, FT25W, FT26WT, FT109WT, FT134W and CY42WT were 6.45, 6.45, 6.54, 6.43, 6.52 and 6.74 Mbp with G+C contents of 64.0, 64.0, 63.8, 63.2, 63.2 and 62.5 %, respectively. The calculated pairwise average nucleotide (ANI) values among the six strains and other related species were less than 93.9 %, except that the values were 99.9 % between strains FT9WT and FT25W, 98.2 % between strains FT109WT and FT134W, and 95.0 and 95.1 % between strain FT26WT and strains FT9WT and FT25W, respectively. However, strain FT26WT shared 16S rRNA gene sequence similarities of only 98.3 and 98.2 % with FT9WT and FT25W, respectively. The respiratory quinone of the six strains was determined to be Q-8. The major fatty acids were C16 : 1 ω7c, C16 : 0 and C12 : 0. The predominant polar lipids included phosphatidylethanolamine and phosphatidylglycerol. Considering the phenotypic, biochemical, genotypic and ANI data, strains FT9WT and FT25W, and FT109WT and FT134W may belong to the same species, respectively. Although the pairwise ANI values between strain FT26WT and each of strains FT9WT and FT25W were located in the transition region of species demarcation, the dissimilarities among them indicated that strain FT26WT could represent an independent novel species. The reconstructed phylogenomic tree based on a concatenation of 92 core genes showed that the six strains clustered closely with Duganella sacchari Sac-22T and Duganella radicis KCTC 22382T, and supported that these six strains belong to the genus Duganella . The names Duganella albus sp. nov. (type strain FT9WT=GDMCC 1.1637T=KACC 21313T), Duganella aquatilis sp. nov. (type strain FT26WT=GDMCC 1.1641T=KACC 21315T), Duganella pernnla sp. nov. (type strain FT109WT=GDMCC 1.1688T=KACC 21480T) and Duganella levis sp. nov. (type strain CY42WT=GDMCC 1.1673T=KACC 21465T) are proposed.

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Eder, Wolfgang, Gerhard Wanner, Wolfgang Ludwig, Hans-Jürgen Busse, Frank Ziemke-Kägeler, and Elke Lang. "Description of Undibacterium oligocarboniphilum sp. nov., isolated from purified water, and Undibacterium pigrum strain CCUG 49012 as the type strain of Undibacterium parvum sp. nov., and emended descriptions of the genus Undibacterium and the species Undibacterium pigrum." International Journal of Systematic and Evolutionary Microbiology 61, no. 2 (February 1, 2011): 384–91. http://dx.doi.org/10.1099/ijs.0.018648-0.

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A Gram-negative, oxidase- and catalase-positive, flagellated, rod-shaped bacterium, designated strain EM 1T, was isolated from purified water. 16S rRNA gene sequence analysis indicated that the novel strain belonged to the family Oxalobacteraceae within the class Betaproteobacteria; the closest phylogenetic relative was Undibacterium pigrum DSM 19792T (96.7 % gene sequence similarity). The new isolate could be distinguished from the type strain of U. pigrum DSM 19792T (=CCUG 49009T=CIP 109318T) and from strain CCUG 49012T, which has been described as a second genomovar of this species, on the basis of genotypic data and several phenotypic properties. An S-layer was present in the cell envelope in U. pigrum DSM 19792T, but was absent in strains EM 1T and CCUG 49012T. Test conditions were established that enabled strain CCUG 49012T to be distinguished from U. pigrum DSM 19792T. As found for U. pigrum, the main fatty acids of strains EM 1T and CCUG 49012T were summed feature 3 (including unsaturated C16 : 1 ω7c), straight-chain C16 : 0 and unsaturated C18 : 1 ω7c (low percentage in strain CCUG 49012T), and C10 : 0 3-OH was the sole hydroxylated fatty acid. The polar lipid profile consisted of the predominant lipids phosphatidylethanolamine, diphosphatidylglycerol and phosphatidylglycerol. The polyamine profile was mainly composed of the major compound putrescine and moderate amounts of 2-hydroxyputrescine. In contrast to U. pigrum and strain CCUG 49012T, where ubiquinone Q8 was reported as the sole quinone component, the quinone system of strain EM 1T consisted of ubiquinone Q-8 (64 %) and Q-7 (36 %). The 16S rRNA gene sequence similarity, the polar lipid profile and the absence of C12-hydroxylated fatty acids all indicated that strain EM 1T was affiliated with the genus Undibacterium. 16S rRNA gene sequence similarity values lower than 97.0 % and several differentiating phenotypic traits demonstrated that strain EM 1T represents a novel species for which the name Undibacterium oligocarboniphilum sp. nov. is proposed (type strain EM 1T=DSM 21777T=CCUG 57265T). In addition, based on previously published results and this study, a separate species, Undibacterium parvum sp. nov., is proposed with strain CCUG 49012T (=DSM 23061T=CIP 109317T) as the type strain.

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Steenwerth, Kerri L., Ian Morelan, Ruby Stahel, Rosa Figueroa-Balderas, Dario Cantu, Jungmin Lee, Ron C. Runnebaum, and Amisha T. Poret-Peterson. "Fungal and bacterial communities of ‘Pinot noir’ must: effects of vintage, growing region, climate, and basic must chemistry." PeerJ 9 (February 4, 2021): e10836. http://dx.doi.org/10.7717/peerj.10836.

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Background The geographic and temporal distributions of bacterial and fungal populations are poorly understood within the same wine grape cultivar. In this work, we describe the microbial composition from ‘Pinot noir’ must with respect to vintage, growing region, climate, and must chemistry across the states of California and Oregon, USA. Materials and Methods We sampled ‘Pinot noir’ clone 667 clusters from 15 vineyards existing in a latitudinal gradient spanning nearly 1,200 km in California and Oregon for two vintages (2016 and 2017). Regions included five American Viticultural Areas (AVA). In order from southern California to Oregon, these AVAs were Santa Barbara, Monterey, Sonoma, Mendocino, and Willamette Valley. Uninoculated grape musts were subjected to 16S rRNA gene and ITS-1 amplicon sequencing to assess composition of microbial communities. We also measured grape maturity metrics. Finally, to describe regions by precipitation and growing degree days, we queried the Parameter-elevation Regressions on Independent Slopes Model (PRISM) spatial climate dataset. Results Most of the dominant bacterial taxa in must samples were in the family Enterobacteriaceae, notably the lactic acid bacteria or the acetic acid bacteria groups, but some, like the betaproteobacterial genus Massilia, belonged to groups not commonly found in grape musts. Fungal communities were dominated by Hanseniaspora uvarum (Saccharomycetaceae). We detected relationships between covariates (e.g., vintage, precipitation during the growing season, pH, titratable acidity, and total soluble solids) and bacterial genera Gluconobacter and Tatumella in the family Enterobacteraceae, Sphingomonas (Sphingomonodaceae), Lactobacillus (Lactobacillaceae), and Massilia (Oxalobacteraceae), as well as fungal genera in Hanseniaspora, Kazachstania, Lachancea, Torulaspora in the family Saccharomycetaceae, as well as Alternaria (Pleosporaceae), Erysiphe (Erysiphaceae), and Udeniomyces (Cystofilobasidiaceae). Fungal community distances were significantly correlated with geographic distances, but this was not observed for bacterial communities. Climate varied across regions and vintages, with growing season precipitation ranging from 11 mm to 285 mm and growing degree days ranging from 1,245 to 1,846. Discussion We determined that (1) bacterial beta diversity is structured by growing season precipitation, (2) fungal beta diversity reflects growing season precipitation and growing degree days, and (3) microbial differential abundances of specific genera vary with vintage, growing season precipitation, and fruit maturity metrics. Further, the correlation between fungal community dissimilarities and geographic distance suggests dispersal limitation and the vineyard as a source for abundant fungal taxa. Contrasting this observation, the lack of correlation between bacterial community dissimilarity and geographic distance suggests that environmental filtering is shaping these communities.

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Stinca, Adriano, Maria Ravo, Rossana Marzaioli, Giovanna Marchese, Angela Cordella, Flora A. Rutigliano, and Assunta Esposito. "Changes in Multi-Level Biodiversity and Soil Features in a Burned Beech Forest in the Southern Italian Coastal Mountain." Forests 11, no. 9 (September 11, 2020): 983. http://dx.doi.org/10.3390/f11090983.

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In the context of global warming and increasing wildfire occurrence, this study aims to examine, for the first time, the changes in multi-level biodiversity and key soil features related to soil functioning in a burned Mediterranean beech forest. Two years after the 2017 wildfire, changes between burned and unburned plots of beech forest were analyzed for plant communities (vascular plant and cover, bryophytes diversity, structural, chorological, and ecological variables) and soil features (main chemical properties, microbial biomass and activity, bacterial community composition, and diversity), through a synchronic study. Fire-induced changes in the micro-environmental conditions triggered a secondary succession process with colonization by many native pioneer plant species. Indeed, higher frequency (e.g., Scrophularia vernalis L., Rubus hirtus Waldst. and Kit. group, and Funaria hygrometrica Hedw.) or coverage (e.g., Verbascum thapsus L. subsp. thapsus and Digitalis micrantha Roth ex Schweigg.) of the species was observed in the burned plots, whereas the typical forest species showed a reduction in frequency, but not in cover, except for Fagus sylvatica subsp. sylvatica. Overall, an increase in plant species and family richness was found in the burned plots, mainly in the herbaceous and bryophyte layers, compared to the unburned plots. Burned plots showed an increase in therophytes, chamaephytes, cosmopolites, steno-Mediterranean and Atlantic species, and a decrease in geophytes and Eurasiatic plants. Significant differences were found in burned vs. control soils for 10 phyla, 40 classes, 79 orders, 145 families, 342 genera, and 499 species of bacteria, with about 50% of each taxon over-represented and 50% under-represented in burned than in control. Changes in bacterial richness within several families (reduction in Acidobacteriaceae, Solibacteraceae, Rhodospirillaceae, and Sinobacteraceae; increase in Micrococcaceae, Comamonadaceae, Oxalobacteraceae, Pseudomonadaceae, Hymenobacteraceae, Sphingomonadaceae, Cytophagaceae, Nocardioidaceae, Opitutaceae, Solirubrobacteraceae, and Bacillaceae) in burned soil were related to fire-induced chemical changes of soil (pH, electrical conductivity, and cation exchange capacity). No evident effect of the wildfire was found on organic C content, microbial biomass (total microbial carbon and fungal mycelium) and activity, and microbial indexes (fungal percentage of microbial C, metabolic quotient, and quotient of mineralization), suggesting that soil functions remained unchanged in the burned area. Therefore, we hypothesize that, without an additional disturbance event, a re-establishment of beech forest can be expected but with an unpredictable time of post-fire succession.

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Cretoiu, Mariana Silvia, Gerard W. Korthals, Johnny H. M. Visser, and Jan Dirk van Elsas. "Chitin Amendment Increases Soil Suppressiveness toward Plant Pathogens and Modulates the Actinobacterial and Oxalobacteraceal Communities in an Experimental Agricultural Field." Applied and Environmental Microbiology 79, no. 17 (June 28, 2013): 5291–301. http://dx.doi.org/10.1128/aem.01361-13.

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ABSTRACTA long-term experiment on the effect of chitin addition to soil on the suppression of soilborne pathogens was set up and monitored for 8 years in an experimental field, Vredepeel, The Netherlands. Chitinous matter obtained from shrimps was added to soil top layers on two different occasions, and the suppressiveness of soil towardVerticillium dahliae, as well as plant-pathogenic nematodes, was assessed, in addition to analyses of the abundances and community structures of members of the soil microbiota. The data revealed that chitin amendment had raised the suppressiveness of soil, in particular towardVerticillium dahliae, 9 months after the (second) treatment, extending to 2 years following treatment. Moreover, major effects of the added chitin on the soil microbial communities were detected. First, shifts in both the abundances and structures of the chitin-treated soil microbial communities, both of total soil bacteria and fungi, were found. In addition, the abundances and structures of soil actinobacteria and theOxalobacteraceaewere affected by chitin. At the functional gene level, the abundance of specific (family-18 glycoside hydrolase) chitinase genes carried by the soil bacteria also revealed upshifts as a result of the added chitin. The effects of chitin noted for theOxalobacteraceaewere specifically related to significant upshifts in the abundances of the speciesDuganella violaceinigraandMassilia plicata. These effects of chitin persisted over the time of the experiment.

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Bushman, Timothy J., Denise M. Akob, Tsing Bohu, Andrea Beyer, Tanja Woyke, Nicole Shapiro, Alla Lapidus, Hans-Peter Klenk, and Kirsten Küsel. "Draft Genome Sequence of Mn(II)-Oxidizing Bacterium Oxalobacteraceae sp. Strain AB_14." Microbiology Resource Announcements 8, no. 43 (October 24, 2019). http://dx.doi.org/10.1128/mra.01024-19.

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Biological Mn(II) oxidation produces reactive manganese oxides that help to mitigate metal contamination in the environment. Here, we present the genome of Oxalobacteraceae sp. strain AB_14, a species of Mn(II)-oxidizing bacteria (MOB) that is notable for its ability to catalyze Mn oxidation at low pH (5.5).

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Peta, Vincent, Rachel Raths, and Heike Bücking. "Draft Genome Sequence of Massilia sp. Strain ONC3, a Novel Bacterial Species of the Oxalobacteraceae Family Isolated from Garden Soil." Microbiology Resource Announcements 8, no. 32 (August 8, 2019). http://dx.doi.org/10.1128/mra.00377-19.

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From garden soil, we isolated and sequenced Massilia sp. strain ONC3, a new member of the Oxalobacteraceae within the Massilia genus. Sequence analysis showed an assembled genome size of 5,622,601 bp, with a predicted total of 5,104 protein-coding sequences, 3,194 functionally assigned genes, 2 rRNA operons, and 56 tRNAs.

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Zhao, Shiyu, Luyao Ruan, Dongmei Mao, Xueting Jiang, Yu Lv, Qi Zhang, Jian He, and Qirong Shen. "Keguizhuia sedimenti gen. nov., sp. nov., isolated from river sediment represents a novel genus of the family Oxalobacteraceae." International Journal of Systematic and Evolutionary Microbiology 74, no. 3 (March 28, 2024). http://dx.doi.org/10.1099/ijsem.0.006289.

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A Gram-stain-negative bacterium, designated as R-40T, was isolated from sediment of the Mulong river in Mianyang city, Sichuan province, PR China. The cells of strain R-40T were aerobic non-motile and formed translucent white colonies on R2A agar. Growth occurred at 15–37 °C (optimum 30 °C), pH 5.0–9.0 (optimum 7.0) and salinities of 0–3.0 % (w/v, optimum 0 %). R-40T showed 95.2–96.6 % 16S rRNA gene sequence similarities with the type strains of species of the genera Oxalicibacterium, Herminiimonas, Lacisediminimonas, Paucimonas, Herbaspirillum and Noviherbaspirillum in the family Oxalobacteraceae. The results of phylogenetic analysis based on genome sequences indicated that the strain was clustered with type strains of species of the genera Oxalicibacterium and Herminiimonas in the family Oxalobacteraceae but formed a distinct lineage. The average nucleotide identity (ANI), digital DNA–DNA hybridization (dDDH) and average amino acid identity (AAI) values between R-40T and type strains of species of the genera Oxalicibacterium, Herminiimonas, Lacisediminimonas, Paucimonas, Herbaspirillum and Noviherbaspirillum ranged from 69.3 to 74.1 %, from 18.2 to 21.4 % and from 60.1 to 67.4 %, respectively. The major cellular fatty acids were C16 : 0, C17 : 0 cyclo and summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c). The major quinone was ubiquinone-8 (Q-8). The polar lipid profile consisted of diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phospholipid and small amounts of glycophospholipids. The genome size of R-40T was 5.1 Mbp with 54.0 % DNA G+C content. On the basis of the evidence presented in this study, strain R-40T represents a novel species of a novel genus in the family Oxalobacteraceae, for which the name Keguizhuia sedimenti gen. nov., sp. nov. (type strain R-40T=MCCC 1K08818T=KCTC 8137T) is proposed.

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Ma, Tengfei, Han Xue, Chungen Piao, Ning Jiang, and Yong Li. "Genome-based analyses of family Oxalobacteraceae reveal the taxonomic classification." Research in Microbiology, May 2023, 104076. http://dx.doi.org/10.1016/j.resmic.2023.104076.

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Yan, Ming, Yu-Long Ouyang, Li-Yuan Xiao, Man Ao, Martin Gosau, Reinhard E. Friedrich, Ralf Smeets, Ling-Ling Fu, Hong-chao Feng, and Simon Burg. "Correlations between gut microbiota and lichen planus: a two-sample Mendelian randomization study." Frontiers in Immunology 14 (September 12, 2023). http://dx.doi.org/10.3389/fimmu.2023.1235982.

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PurposeSeveral existing studies have revealed that the occurrence of lichen planus (LP) is relevant to the gut microbiota, and the causal relationship between gut microbiota and LP was analyzed using the Mendelian randomization (MR) method.MethodsThrough the two-sample MR method, single nucleotide polymorphisms (SNPs) relevant to gut microbiota were selected as instrument variables (IVs) to evaluate the causal association between gut microbiota and the risk of LP.ResultsAccording to the selection criteria of inverse-variance weighted (IVW), six bacterial genera were found to be significantly linked to the initiation of LP; The IVW results suggested that Oxalobacteraceae, Victivallaceae, and Actinobacteria could restrain the initiation of LP, showing protective effects against LP. Desulfovibrio, Veillonella, and Ruminococcus gauvreauii groups were demonstrated to have casual correlations with the onset of LP.ConclusionThe relationship between gut microbiota and LP was not a single positive or inverse relationship. Investigation of the causal relationship of these gut microbiota with LP could further provide evidence for the intestine-skin axis theory. However, the specific mechanism of microorganisms affecting the skin remains to be clarified. In this paper, the protective effects and mechanisms of Oxalobacteraceae, Victivallaceae, and Actinobacteria on LP require further exploration.

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Wang, Jiaqi, Zidong Liu, Jianbo Ren, Mingming Zhang, Zimeng Guan, Xingchun Zhao, Cairong Gao, and Gengqian Zhang. "A preliminary study characterizing temporal changes in soil bacterial communities after dismembered bones were buried." ELECTROPHORESIS, February 8, 2024. http://dx.doi.org/10.1002/elps.202300274.

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AbstractDetermining the burial time of skeletal remains is one of the most important issues of forensic medicine. We speculated that the microbiome of gravesoil may be a promising method to infer burial time by virtue of time‐dependent. As we know, forensic scientists have established various models to predict the postmortem interval of a decedent based on the changes in body and soil microbiome communities. However, limited data are available on the burial time prediction for bones, especially dismembered bones. In this exploratory study, we initially conducted 16S rRNA amplicon high‐throughput sequencing on the burial soil of 10 porcine femurs within a 120‐day period and analyzed the changes in soil microbial communities. Compared with the control soil, a higher Shannon index in the microbial diversity of burial soil containing bones was observed. Correlation analysis identified 61 time‐related bacterial families and the best subset selection method obtained best subset, containing Thermomonosporaceae, Clostridiaceae, 0319‐A21, and Oxalobacteraceae, which were used to construct a simplified multiple linear regression model with a mean absolute error (MAE) of 56.69 accumulated degree day (ADD). An additional random forest model was established based on indicators for the minimum cross‐validation error of Thermomonosporaceae, Clostridiaceae, 0319‐A21, Oxalobacteraceae, and Syntrophobacteraceae, with an MAE of 55.65 ADD. The produced empirical data in this pilot study provided the evidence of feasibility that the microbial successional changes of burial soil will predict the burial time of dismembered bones and may also expand the current knowledge of the effects of bone burial on soil bacterial communities.

Journal articles on the topic 'Oxalobacteraceae'

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