Zeitschriftenartikel: „Stenotrophomonas rhizophila“

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Rupaedah, Bedah, Debby Viola Amanda, Reni Indrayanti, Nia Asiani, Bambang Sukmadi, Asep Ali, Abdul Wahid, Taufik Firmansyah und Mahmud Sugianto. „AKTIVITAS Stenotrophomonas rhizophila DAN Trichoderma sp. DALAM MENGHAMBAT PERTUMBUHAN Ganoderma boninense“. Jurnal Bioteknologi & Biosains Indonesia (JBBI) 5, Nr. 1 (11.06.2018): 53. http://dx.doi.org/10.29122/jbbi.v5i1.2767.

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Activities of Stenotrophomonas rhizophila and Trichoderma sp. in Inhibiting the Growth of Ganoderma boninense ABSTRACTBasal stem rot (BSR) disease in oil palm (Elaeis guineensis Jacq.) due to infection of Ganoderma boninense. Various efforts to overcome BSR disease has been done, such as by utilizing endophytic microbes. The purpose of this research was to determine the activities of Stenotrophomonas rhizophila and Trichoderma sp inhibiting the growth of G. boninense. This research was divided into three stages, namely: stability test of S. rhizophila activity against G. boninense; activity of chitinase and cellulase enzymes produced by S. rhizophila; the effectiveness of S. rhizophila and Trichoderma sp. on G. boninense in a greenhouse. The parameters observed were plant height, leaves number, chlorophyll content, disease incidence and severity. The stability testing of S. rhizophila activity against G. boninense showed 53% of inhibition. Chitinase activity showed negative result. While cellulase index was about 0.46. The effectiveness test showed the significantly different results on plant height, leaves number and chlorophyll content.Keywords: Chitinase, cellulase, Ganoderma boninense, Stenotrophomonas rhizophila, Trichoderma sp. ABSTRAKPenyakit busuk pangkal batang (BPB) pada tanaman kelapa sawit (Elaeis guineensis Jacq.) muncul karena diinfeksi oleh Ganoderma boninense. Berbagai upaya penanggulangan penyakit BPB telah dilakukan, diantaranya dengan memanfaatkan mikroba endofit. Tujuan dari penelitian ini adalah untuk mengetahui aktivitas bakteri Stenotrophomonas rhizophila dan Trichoderma sp. dalam menghambat pertumbuhan G. boninense. Penelitian ini dibagi menjadi tiga tahapan, yaitu: pengujian stabilitas aktivitas S. rhizophila terhadap G. boninense; pengujian aktivitas enzim kitinase dan selulase yang dihasilkan oleh S. rhizophila; pengujian efektivitas S. rhizophila dan Trichoderma sp. terhadap G. boninense di rumah kaca. Parameter yang diamati pada pengujian efektivitas berupa tinggi tanaman, jumlah daun, jumlah klorofil, kejadian dan keparahan penyakit. Uji stabilitas aktivitas S. rhizophila terhadap G. boninense menunjukkan adanya penghambatan rata-rata sebesar 53%. Uji aktivitas enzim kitinase pada bakteri S. rhizophila menunjukkan hasil negatif. Sedangkan indeks enzim selulase pada bakteri S. rhizophila sebesar 0.46. Pada uji efektivitas tampak hasil yang berbeda nyata pada parameter tinggi tanaman, jumlah daun dan kandungan klorofil.Kata Kunci: Kitinase, selulase, Ganoderma boninense, Stenotrophomonas rhizophila, Trichoderma sp.

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Pinski, Artur, Joanna Zur, Robert Hasterok und Katarzyna Hupert-Kocurek. „Comparative Genomics of Stenotrophomonas maltophilia and Stenotrophomonas rhizophila Revealed Characteristic Features of Both Species“. International Journal of Molecular Sciences 21, Nr. 14 (12.07.2020): 4922. http://dx.doi.org/10.3390/ijms21144922.

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Although Stenotrophomonas maltophilia strains are efficient biocontrol agents, their field applications have raised concerns due to their possible threat to human health. The non-pathogenic Stenotrophomonas rhizophila species, which is closely related to S. maltophilia, has been proposed as an alternative. However, knowledge regarding the genetics of S. rhizophila is limited. Thus, the aim of the study was to define any genetic differences between the species and to characterise their ability to promote the growth of plant hosts as well as to enhance phytoremediation efficiency. We compared 37 strains that belong to both species using the tools of comparative genomics and identified 96 genetic features that are unique to S. maltophilia (e.g., chitin-binding protein, mechanosensitive channels of small conductance and KGG repeat-containing stress-induced protein) and 59 that are unique to S. rhizophila (e.g., glucosylglycerol-phosphate synthase, cold shock protein with the DUF1294 domain, and pteridine-dependent dioxygenase-like protein). The strains from both species have a high potential for biocontrol, which is mainly related to the production of keratinases (KerSMD and KerSMF), proteinases and chitinases. Plant growth promotion traits are attributed to the biosynthesis of siderophores, spermidine, osmoprotectants such as trehalose and glucosylglycerol, which is unique to S. rhizophila. In eight out of 37 analysed strains, the genes that are required to degrade protocatechuate were present. While our results show genetic differences between the two species, they had a similar growth promotion potential. Considering the information above, S. rhizophila constitutes a promising alternative for S. maltophilia for use in agricultural biotechnology.

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Uddin, M. J., M. N. H. Mehedi, M. Robbani, M. F. Hasan und S. M. A. Islam. „Influence of post-harvest application of Stenotrophomonas rhizophila on quality of mango cv. BARI Aam-3“. Bangladesh Journal of Agriculture 48, Nr. 2 (25.12.2023): 13–29. http://dx.doi.org/10.3329/bjagri.v48i2.70155.

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The study was conducted at the Postharvest and Plant Biotechnology Laboratory, Department of Horticulture, Patuakhali Science and Technology University, Patuakhali, Bangladesh during the period from July to December 2018 to study the biocontrol performance of selected antagonistic bacteria Stenotrophomonas rhizophila strain PSTU-Hort-14 on BARI Aam-3. All the treatments were arranged in a completely randomized design (CRD) with five replications and repeated twice. The bacterial strain PSTU-Hort-14 was found highly compatible with 20% lemongrass extract and 2% sodium bicarbonate (SBC) or mixture of both which reduced 96.5% of the disease over control in naturally infected fruits at the end of 14 days of storage at 12±1ºC and 90±5% RH. The combined treatments of Stenotrophomonas rhizophila-lemongrass extract-SBC showed reduced weight loss by more than 25% compared to the control at 12±1ºC and 90±5% RH. The shelf life was thus extended by 15 days compared to control at 12±1ºC and 90±5% RH. Finally, it was clear that the strain Stenotrophomonas rhizophila strain PSTU-Hort-14 was effective when incorporated with 2% SBC and 20% lemongrass extract to control C. gloeosporioides as well as improve the postharvest quality of BARI Aam-3 during cold storage. Bangladesh J. Agri. 2023, 48(2): 13-29

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Brovarska, O. S., L. D. Varbanets, G. V. Gladka und O. B. Tashyrev. „Characteristics of Stenotrophomonas rhizophila Lipopolysaccharide, a Representative of Antarctica“. Mikrobiolohichnyi Zhurnal 85, Nr. 6 (21.12.2023): 3–14. http://dx.doi.org/10.15407/microbiolj85.06.003.

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In 2002, Wolf described a new species of Stenotrophomonas, Stenotrophomonas rhizophila, which is a non-pathogenic plant inhabitant. The defining characteristics of the new species, in contrast to S. maltophilia, were the following: growth at 4 °C, but its absence at 37 °C; the use of xylose as a carbon source; low osmolytic tolerance. S. rhizophila is isolated exclusively from the rhizosphere or from the internal tissues of plants, in particular from the vascular tissues of the root and stem. In 2014, a number of authors, studying cultivated heterotrophic bacteria and yeasts, which dominate in plant samples collected from various terrestrial biotopes near the Ukrainian Antarctic station on Galindez Island in Marine Antarctica, isolated a number of bacterial isolates. The authors’ phylogenetic analysis using only BLAST analysis made it possible to determine the approximate phylogenetic affiliation of the bacterial isolate to the family Gammaproteobacteria (genus Stenotrophomonas, species S. rhizophila). It is known that many processes that determine the biological features of microorganisms, the nature of their relationships between them, as well as micro- and macroorganisms in biocenoses, are carried out with the participation of the surface structures of the bacterial cell, which are in direct contact with the environment. Among them, of particular interest are lipopolysaccharides (LPS), components of the outer membrane of Gram-negative bacteria. However, to date, we have not found any works devoted to the study of S. rhizophila lipopolysaccharides in the literature available to us. The aim of the work was to clarify the phylogenetic position of the 6p5m bacterial strain isolated from the Antarctic region by constructing dendrograms, to study some of its phenotypic properties, to isolate lipopolysaccharides and study chemical and component composition, serological, and biological properties. Methods. Identification was carried out via ribosomal phylogeny. A fragment of the 16S rRNA gene of bacterial strain 6p5m was amplified by PCR using primers 8F and 1492R. The phylogenetic position of the strains was determined by construction of dendrograms, which show the position of the investigated strains among closely related and typical species and type species (programs ClustalX 2.1, Mega v. 6.00). LPS was obtained from cells by water-phenol extraction, electrophoresis was carried out in polyacrylamide gel, monosaccharide and fatty acid composition was determined by chromato-mass spectrometry, antigenic activity was studied by immunodiffusion in agar. Results. Phylogenetic analysis of the nucleotide sequence of the 16S rRNA gene revealed a high level of homology (99.8%) of the bacterial strain 6p5m with typical strain S. rhizophila DSM 14405T from the GenBank database, which allows us to classify it. Comparing phylogenetic analysis with phenotypic data, we can assert that strain 6p5m belongs to the S. rhizophila species. When studying the biopolymer composition of LPS by specific reactions to each component, it was found that the carbohydrate content was relatively low and amounted to 27.42% and 13.34% for LPS1 and LPS2, respectively. The content of characteristic LPS components: heptose and 2-keto-3-deoxyoctonic (KDO) acid was 1.78% and 0.034%, as well as 5.38% and 0.09%, respectively, for LPS1 and LPS2. Analysis of the monosaccharide composition of LPS preparations showed that fucose (72.57%) is present as a dominant monosaccharide in LPS1 and rhamnose (65.04%) in LPS2. The main monosaccharides of the extracellular component were galactose (39.92%) and rhamnose (24.36%). Analysis of the lipid part of the studied LPS indicates significant differences between them. In the composition of lipid A LPS1 and LPS2 of S. rhizophila 6p5m, anti-iso-pentadecanoic acid (a-i-C15:0) was predominant (25.58% and 39.24%, respectively), and 3-hydroxydodecanoic acid (3-OH-C12:0) in LPS2 (26.21%), hexadecanoic acid (С16:0) (27.06% and 10.51%, respectively) for LPS1 and LPS2. Cyclic acids were present only in LPS1, while i-C15:0 and 9-C16:1 only in LPS2. Electrophoretic analysis showed heterogeneity characteristic of an LPS molecule, manifested by a plurality of bands in the form of a «ladder» when the gel was stained with silver ions, which is associated with the presence in the composition of LPS preparations of O-specific polysaccharide structures with different lengths of oligosaccharide chains, which determine their different molecular weight. On the electropherogram of LPS1 and LPS2, bands were not visualized in the upper part of the electrophoretic track, which indicates the absence of S-forms of LPS with long O-specific chains, but a significant predominance of SR-form molecules in the membrane LPS pool. S. rhizophila 6p5m LPS showed significantly higher pyrogenic activity compared to pyrogenal, a pharmaceutical preparation, an active ingredient of which is Shigella typhi LPS. The extracellular polymer did not exhibit pyrogenic activity. In the double immunodiffusion reaction in agar according to Ouchterlony, it was found that the studied LPSs in the homologous system exhibit antigen activity. The antigens present in both LPS1and LPS2 and the extracellular component are identical: the antigen present in each of the wells binds to all antibodies that can interact with the antigen from the other well. It was shown that pre-sowing treatment of seeds with LPS preparations of S. rhizophila 6p5m stimulates the energy of seed germination. LPS1 (+2.82 cm) showed the greatest impact in comparison with the control. A significant stimulatory effect of LPS1, LPS2, and extracellular polymer was observed when studying their effects on mustard seedlings. Conclusions. The taxonomic position of bacterial strain 6r5m of the ecosystems of the polar region (Antarctica) was determined via the phylogenetic analysis taking into account the phenotypic features of the strain. The bacterial strain is represented in the phylum Proteobacteria, class Gammaproteobacteria, family Xanthomonadaceae, genus Stenotrophomonas, species S. rhizophila. From S. rhizophila cells, LPS preparations were obtained, which differed in monosaccharide and fatty acid composition, but showed high pyrogenicity. S. rhizophila represents a promising alternative to S. maltophilia for applications in agricultural biotechnology and biological control due to its ability to both stimulate plant growth and protect roots from biotic and abiotic stresses.

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Ramos, Patrícia L., Stefanie Van Trappen, Fabiano L. Thompson, Rafael C. S. Rocha, Heloiza R. Barbosa, Paul De Vos und Carlos A. Moreira-Filho. „Screening for endophytic nitrogen-fixing bacteria in Brazilian sugar cane varieties used in organic farming and description of Stenotrophomonas pavanii sp. nov.“ International Journal of Systematic and Evolutionary Microbiology 61, Nr. 4 (01.04.2011): 926–31. http://dx.doi.org/10.1099/ijs.0.019372-0.

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A Gram-negative, rod-shaped, non-spore-forming and nitrogen-fixing bacterium, designated ICB 89T, was isolated from stems of a Brazilian sugar cane variety widely used in organic farming. 16S rRNA gene sequence analysis revealed that strain ICB 89T belonged to the genus Stenotrophomonas and was most closely related to Stenotrophomonas maltophilia LMG 958T, Stenotrophomonas rhizophila LMG 22075T, Stenotrophomonas nitritireducens L2T, [Pseudomonas] geniculata ATCC 19374T, [Pseudomonas] hibiscicola ATCC 19867T and [Pseudomonas] beteli ATCC 19861T. DNA–DNA hybridization together with chemotaxonomic data and biochemical characteristics allowed the differentiation of strain ICB 89T from its nearest phylogenetic neighbours. Therefore, strain ICB 89T represents a novel species, for which the name Stenotrophomonas pavanii sp. nov. is proposed. The type strain is ICB 89T ( = CBMAI 564T = LMG 25348T).

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Rivas-Garcia, Tomas, Bernardo Murillo-Amador, Alejandra Nieto-Garibay, Roberto Chiquito-Contreras, Gabriel Rincon-Enriquez und Luis Hernandez-Montiel. „Effect of Ulvan on the Biocontrol Activity of Debaryomyces hansenii and Stenotrophomonas rhizophila against Fruit Rot of Cucumis melo L.“ Agronomy 8, Nr. 12 (22.11.2018): 273. http://dx.doi.org/10.3390/agronomy8120273.

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In the present study, the following was investigated: (a) The effect of ulvan on in vivo and in vitro biocontrol of Debaryomyces hansenii and Stenotrophomonas rhizophila against Fusarium proliferaum and (b) the effect of ulvan on in vivo and in vitro growth of D. hansenii and S. rhizophila and muskmelon quality parameters. The results showed that the biocontrol activity of D. hansenii and S. rhizophila could be enhanced by ulvan (5 g/L). The combination of ulvan and S. rhizophila resulted in a more effective control of fruit rot in comparison to fungicide benomyl. On in vitro growth of F. proliferatum, individual treatments of D. hansenii and S. rhizophila inhibited spore germination and mycelial growth with no statistical difference with the combined treatments. Ulvan does not have a direct effect on the in vivo and in vitro growth of D. hansenii and S. rhizophila. Furthermore, the combined treatments improve the natural disease incidence and quality parameters like weight, firmness, total soluble solids (TSS), and pH. These results suggest that the use of ulvan may be an effective method to improve the biological activity of D. hansenii and S. rhizophila.

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Rivas-Garcia, Tomas, Bernardo Murillo-Amador, Juan J. Reyes-Pérez, Roberto G. Chiquito-Contreras, Pablo Preciado-Rangel, Graciela D. Ávila-Quezada, Liliana Lara-Capistran und Luis G. Hernandez-Montiel. „Debaryomyces hansenii, Stenotrophomonas rhizophila, and Ulvan as Biocontrol Agents of Fruit Rot Disease in Muskmelon (Cucumis melo L.)“. Plants 11, Nr. 2 (11.01.2022): 184. http://dx.doi.org/10.3390/plants11020184.

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The indiscriminate use of synthetic fungicides has led to negative impact to human health and to the environment. Thus, we investigated the effects of postharvest biocontrol treatment with Debaryomyces hansenii, Stenotrophomonas rhizophila, and a polysaccharide ulvan on fruit rot disease, storability, and antioxidant enzyme activity in muskmelon (Cucumis melo L. var. reticulatus). Each fruit was treated with (1) 1 × 106 cells mL−1 of D. hansenii, (2) 1 × 108 CFU mL−1 of S. rhizophila, (3) 5 g L−1 of ulvan, (4) 1 × 106 cells mL−1 of D. hansenii + 1 × 108 CFU mL−1 of S. rhizophila, (5) 1 × 108 CFU mL−1 of S. rhizophila + 5 g L−1 of ulvan, (6) 1 × 106 cells mL−1 of D. hansenii + 1 × 108 CFU mL−1 of S. rhizophila + 5 g L−1 of ulvan, (7) 1000 ppm of benomyl or sterile water (control). The fruits were air-dried for 2 h, and stored at 27 °C ± 1 °C and 85–90% relative humidity. The fruit rot disease was determined by estimating the disease incidence (%) and lesion diameter (mm), and the adhesion capacity of the biocontrol agents was observed via electron microscopy. Phytopathogen inoculation time before and after adding biocontrol agents were also recorded. Furthermore, the storability quality, weight loss (%), firmness (N), total soluble solids (%), and pH were quantified. The antioxidant enzymes including catalase, peroxidase, superoxide dismutase, and phenylalanine ammonium lyase were determined. In conclusion, the mixed treatment containing D. hansenii, S. rhizophila, and ulvan delayed fruit rot disease, preserved fruit quality, and increased antioxidant activity. The combined treatment is a promising and effective biological control method to promote the shelf life of harvested muskmelon.

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Ribbeck-Busch, Kathrin, Anja Roder, Dirk Hasse, Wietse de Boer, Jose Luis Martinez, Martin Hagemann und Gabriele Berg. „A molecular biological protocol to distinguish potentially human pathogenic Stenotrophomonas maltophilia from plant-associated Stenotrophomonas rhizophila“. Environmental Microbiology 7, Nr. 11 (November 2005): 1853–58. http://dx.doi.org/10.1111/j.1462-2920.2005.00928.x.

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Hagemann, Martin, Kathrin Ribbeck-Busch, Stephan Klähn, Dirk Hasse, Robert Steinbruch und Gabriele Berg. „The Plant-Associated Bacterium Stenotrophomonas rhizophila Expresses a New Enzyme for the Synthesis of the Compatible Solute Glucosylglycerol“. Journal of Bacteriology 190, Nr. 17 (27.06.2008): 5898–906. http://dx.doi.org/10.1128/jb.00643-08.

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ABSTRACT The rhizobacterium Stenotrophomonas rhizophila accumulates the compatible solutes glucosylglycerol (GG) and trehalose under salt stress conditions. The complete gene for the GG synthesis enzyme was cloned and sequenced. This enzyme from S. rhizophila represented a novel fusion protein composed of a putative C-terminal GG-phosphate synthase domain and an N-terminal putative GG-phosphate phosphatase domain, which was named GgpPS. A similar gene was cloned from Pseudomonas sp. strain OA146. The ggpPS gene was induced after a salt shock in S. rhizophila cells. After the salt-loaded cells reached stationary phase, the ggpPS mRNA content returned to the low level characteristic of the control cells, and GG was released into the medium. The complete ggpPS gene and a truncated version devoid of the phosphatase part were obtained as recombinant proteins. Enzyme activity tests revealed the expected abilities of the full-length protein to synthesize GG and the truncated GgpPS to synthesize GG-phosphate. However, dephosphorylation of GG-phosphate was detected only with the complete GgpPS protein. These enzyme activities were confirmed by complementation experiments using defined GG-defective mutants of the cyanobacterium Synechocystis sp. strain PCC 6803. Genes coding for proteins very similar to the newly identified fusion protein GgpPS for GG synthesis in S. rhizophila were found in genome sequences of related bacteria, where these genes are often linked to a gene coding for a transporter of the Mfs superfamily.

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Wolf, A. „Stenotrophomonas rhizophila sp. nov., a novel plant-associated bacterium with antifungal properties“. INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY 52, Nr. 6 (01.11.2002): 1937–44. http://dx.doi.org/10.1099/ijs.0.02135-0.

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Wolf, Arite, Antje Fritze, Martin Hagemann und Gabriele Berg. „Stenotrophomonas rhizophila sp. nov., a novel plant-associated bacterium with antifungal properties.“ International Journal of Systematic and Evolutionary Microbiology 52, Nr. 6 (01.11.2002): 1937–44. http://dx.doi.org/10.1099/00207713-52-6-1937.

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Liu, Ying, Jie Gao, Zhihui Bai, Shanghua Wu, Xianglong Li, Na Wang, Xiongfeng Du et al. „Unraveling Mechanisms and Impact of Microbial Recruitment on Oilseed Rape (Brassica napus L.) and the Rhizosphere Mediated by Plant Growth-Promoting Rhizobacteria“. Microorganisms 9, Nr. 1 (12.01.2021): 161. http://dx.doi.org/10.3390/microorganisms9010161.

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Plant growth-promoting rhizobacteria (PGPR) are noticeably applied to enhance plant nutrient acquisition and improve plant growth and health. However, limited information is available on the compositional dynamics of rhizobacteria communities with PGPR inoculation. In this study, we investigated the effects of three PGPR strains, Stenotrophomonas rhizophila, Rhodobacter sphaeroides, and Bacillus amyloliquefaciens on the ecophysiological properties of Oilseed rape (Brassica napus L.), rhizosphere, and bulk soil; moreover, we assessed rhizobacterial community composition using high-throughput Illumina sequencing of 16S rRNA genes. Inoculation with S. rhizophila, R. sphaeroides, and B. amyloliquefaciens, significantly increased the plant total N (TN) (p < 0.01) content. R. sphaeroides and B. amyloliquefaciens selectively enhanced the growth of Pseudomonadacea and Flavobacteriaceae, whereas S. rhizophila could recruit diazotrophic rhizobacteria, members of Cyanobacteria and Actinobacteria, whose abundance was positively correlated with inoculation, and improved the transformation of organic nitrogen into inorganic nitrogen through the promotion of ammonification. Initial colonization by PGPR in the rhizosphere affected the rhizobacterial community composition throughout the plant life cycle. Network analysis indicated that PGPR had species-dependent effects on niche competition in the rhizosphere. These results provide a better understanding of PGPR-plant-rhizobacteria interactions, which is necessary to develop the application of PGPR.

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Yakubovskij, Vyacheslav I., Vera V. Morozova, Yuliya N. Kozlova, Artem Y. Tikunov, Igor V. Babkin, Alevtina V. Bardasheva, Elena V. Zhirakovskaya, Ivan K. Baykov, Galina B. Kaverina und Nina V. Tikunova. „A Novel Podophage StenR_269 Suggests a New Family in the Class Caudoviricetes“. Viruses 15, Nr. 12 (15.12.2023): 2437. http://dx.doi.org/10.3390/v15122437.

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Stenotrophomonas rhizophila was first discovered in soil; it is associated with the rhizosphere and capable of both protecting roots and stimulating plant growth. Therefore, it has a great potential to be used in biocontrol. The study of S. rhizophila phages is important for a further evaluation of their effect on the fitness and properties of host bacteria. A novel phage StenR_269 and its bacterial host S. rhizophila were isolated from a soil sample in the remediation area of a coal mine. Electron microscopy revealed a large capsid (~Ø80 nm) connected with a short tail, which corresponds to the podovirus morphotype. The length of the genomic sequence of the StenR_269 was 66,322 bp and it contained 103 putative genes; 40 of them encoded proteins with predicted functions, 3 corresponded to tRNAs, and the remaining 60 were identified as hypothetical ones. Comparative analysis indicated that the StenR_269 phage had a similar genome organization to that of the unclassified Xanthomonas phage DES1, despite their low protein similarity. In addition, the signature proteins of StenR_269 and DES1 had low similarity and these proteins clustered far from the corresponding proteins of classified phages. Thus, the StenR_269 genome is orphan and the analyzed data suggest a new family in the class Caudoviricetes.

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Rickman, Olivia J., M. Auður Sigurbjörnsdóttir und Oddur Vilhemsson. „Xylanolytic Psychotrophs From Andosolic Sedge Fens and Moss Heaths in Iceland“. Fine Focus 4, Nr. 2 (21.12.2018): 171–86. http://dx.doi.org/10.33043/ff.4.2.171-186.

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Nine xylanolytic bacterial strains were isolated from fen and heath soils in northern Iceland. They were found by 16S rRNA gene sequencing to belong to the genera Paenibacillus, Bacillus, Pseudomonas, and Stenotrophomonas. Using a simple, plate-based semiquantitative assay with azo-crosslinked xylan as the substrate, it was determined that although isolated from cold environments, most of the strains displayed greater xylanolytic activity under mesophilic conditions, with only the paenibacilli displaying markedly cold-active xylanolytic activity. Indeed, for one isolate, Paenibacillus castaneae OV2122, xylanolytic activity was only detected at 15°C and below under the conditions tested. Of the nine strains, Paenibacillus amylolyticus OV2121 displayed the greatest activity at 5°C. Glycohydrolase family-specific PCR indicated that the paenibacilli produced multiple xylanases of families 10 and 11, whereas a family 8 xylanase was detected in Pseudomonas kilonensis AL1515, and a family 11 xylanase in Stenotrophomonas rhizophila AL1610.

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Burakaeva, A. D., G. V. Petrova und A. G. Goncharov. „Bacteria Stenotrophomonas are Promising Agents for the Treatment of Fat-containing Sewage“. Ecology and Industry of Russia 27, Nr. 7 (11.07.2023): 43–47. http://dx.doi.org/10.18412/1816-0395-2023-7-43-47.

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The results of monitoring the biological properties of indigenous bacterial strains isolated from soils, which for a long time were in contact with highly concentrated wastewater from the slaughterhouse of meat processing units, were presented. The resulting strains are able to grow on slaughterhouse wastewater in the presence of animal fats as a carbon source in concentration exceeding the maximum acceptable level for wastewater intended for biological treatment with activated sludge, it demonstrated combined high growth rates and resistance to chlorides. The stimulating effect of wastewater treated by combined indigenous bacterial strains on the germination of barley and corn seeds was confirmed. These strains were identified as Stenotrophomonas rhizophila.

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Clifton-García, Berenice, Juan Villafaña-Rojas, Orfil González-Reynoso, Jorge Robledo-Ortiz, Ricardo Manríquez-González, Porfirio Gutiérrez-González und Yolanda González-García. „Use of an internal loop airlift bioreactor to produce polyhydroxyalkanoates by Stenotrophomonas rhizophila“. Chemical Industry and Chemical Engineering Quarterly, Nr. 00 (2024): 14. http://dx.doi.org/10.2298/ciceq230819014c.

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Airlift-type bioreactors present advantages over conventional systems such as efficient mass transfer, simplicity of construction and low energy consumption. Thus, they are a good alternative for the production of polyhydroxyalkanoates (PHAs) nevertheless, their use for that purpose has been barely studied. This work addresses the design, construction and hydrodynamic characterization of a 2.4 L internal loop airlift bioreactor, evaluating the effect of the air flow, liquid volume, and disperser position, on the interfacial area and the mixing time. Then, it was used for the fed-batch production of PHB by Stenotrophomonas rhizophila from sugar cane molasses. It was found that the conditions to increase the interfacial area and and minimize the mixing time were: airflow, 1.5 vvm; liquid volume, 2400 mL; and disperser position, 5 mm (distance between the air disperser and the drag tube). Under that configuration, the maximum biomass concentration, PHB production, and PHB accumulation achieved (54 h of culture) were: 65.4 g/L, 39.9 g/L, and 60.2 % (g of PHB/100 g dry biomass). The polymer was poli-3-hydroxybutyrate, with a melting temperature of 170?C, crystallinity of 56.4 %, and a Mw of 735 kDa.

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Lara-Capistran, Liliana, Ramon Zulueta-Rodriguez, Thelma Castellanos-Cervantes, Juan J. Reyes-Perez, Pablo Preciado-Rangel und Luis G. Hernandez-Montiel. „Efficiency of Marine Bacteria and Yeasts on the Biocontrol Activity of Pythium ultimum in Ancho-Type Pepper Seedlings“. Agronomy 10, Nr. 3 (18.03.2020): 408. http://dx.doi.org/10.3390/agronomy10030408.

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Ancho-type pepper (Capsicum annuum L.) is a crop susceptible to Pythium ultimum, which has already been controlled with synthetic fungicide applications; however, marine antagonist microorganisms could be an alternative source of control. The efficiency in vitro and in vivo of marine bacteria and yeasts was determined against P. ultimum. The inhibition of the radial growth of P. ultimum was quantified in vitro by the bacteria Stenotrophomonas rhizophila KM01 and KM02; Bacillus subtilis RBM01 and RBM02, B. amyloliquefaciens 2RLBF and 3R4CF; and Pseudomonas spp. 2R6BF and 2RE9CF, as well as the yeasts Debaryomyces hansenii 1R11AB, 1R11CB, and LL01 and Cryptococcus laurentii 2R3BF and 2R1CB. The β-1,3-glucanase activity of the marine microorganisms was quantified in the presence of the phytopathogen. The disease index (DI), growth parameters, and colony forming units (CFU) were determined in ancho-type pepper plants inoculated with marine bacteria, yeasts, and P. ultimum. The radial zone of the phytopathogen was inhibited by 80% and 75% by S. rhizophila KM01 and C. laurentii 2R1CB, respectively. D. hansenii LL01 and S. rhizophila KM02 showed the highest activity of β-1,3-glucanase, with 6060 U/mL and 47 U/mL, respectively. B. subtilis RBM02 protected 100% of the plants from the oomycete, and an increase was quantified in all the growth parameters and CFU. The use of these marine bacteria and yeasts are, therefore, an option for P. ultimum biocontrol in ancho-type pepper plants, thereby minimizing the application of synthetic fungicides.

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Sun, Shang-Chen, Ji-Xiang Chen, Yong-Gang Wang, Fei-Fan Leng, Jian Zhao, Kai Chen und Qing-Chun Zhang. „Molecular mechanisms of heavy metals resistance of Stenotrophomonas rhizophila JC1 by whole genome sequencing“. Archives of Microbiology 203, Nr. 5 (14.03.2021): 2699–709. http://dx.doi.org/10.1007/s00203-021-02271-0.

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Schmidt, Christoph Stephan, Mohamadali Alavi, Massimiliano Cardinale, Henry Müller und Gabriele Berg. „Stenotrophomonas rhizophila DSM14405T promotes plant growth probably by altering fungal communities in the rhizosphere“. Biology and Fertility of Soils 48, Nr. 8 (03.05.2012): 947–60. http://dx.doi.org/10.1007/s00374-012-0688-z.

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Mourou, Marwa, Arafat Hanani, Anna Maria D’Onghia, Salvatore Walter Davino, Giorgio Mariano Balestra und Franco Valentini. „Antagonism and Antimicrobial Capacity of Epiphytic and Endophytic Bacteria against the Phytopathogen Xylella fastidiosa“. Agronomy 12, Nr. 6 (25.05.2022): 1266. http://dx.doi.org/10.3390/agronomy12061266.

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Olive quick decline syndrome (OQDS), which is caused by Xylella fastidiosa, poses a severe threat to the agriculture of Mediterranean countries and causes severe damage to the olive trees in Italy. Since no effective control measures are currently available, the objective of this study was the screening of antagonistic bacteria that are potentially deployable as biocontrol agents against X. fastidiosa. Therefore, two approaches were used, i.e., the evaluation of the antagonistic activity of (i) endophytic bacteria isolated from two different cultivars of olive trees (Leccino and Ogliarola salentina) and (ii) epiphytic bacteria isolated from the phyllospheres of different host plant species of X. fastidiosa. In vitro dual culture tests showed that 12 out of 200 isolates inhibited X. fastidiosa growth, with appearances of clear zones between 4.0 and 38.6 mm. 16S rRNA gene sequencing revealed different species of the genera Paenibacillus, Bacillus, Pantoea, Microbacterium, Stenotrophomonas, Delftia, and Pseudomonas. Furthermore, an investigation for antimicrobial activity identified 5 out of the 12 antagonistic bacteria, Paenibacillus rigui, Bacillus subtilis, Bacillus pumilus, Microbacterium oxydans, and Stenotrophomonas rhizophila, that were able to produce culture filtrates with inhibitory activities. Our results are promising for further investigation to develop an eco-sustainable strategy to control X. fastidiosa using biocontrol agents or their secreted metabolites.

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Chiquito-Contreras, Roberto G., Bernardo Murillo-Amador, Saul Carmona-Hernandez, Cesar J. Chiquito-Contreras und Luis G. Hernandez-Montiel. „Effect of Marine Bacteria and Ulvan on the Activity of Antioxidant Defense Enzymes and the Bio-Protection of Papaya Fruit against Colletotrichum gloeosporioides“. Antioxidants 8, Nr. 12 (23.11.2019): 580. http://dx.doi.org/10.3390/antiox8120580.

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Anthracnose, caused by Colletotrichum gloeosporioides, is one of the most important diseases in papaya fruit. Its control has been achieved with synthetic fungicides, but the application of marine bacteria and the sulphated polysaccharide ulvan (structural description: β[1,4]-D-GlcA-α[1,4]-L-Rha 3 sulfate, β[1,4]-L-IdoA-α[1,4]-L-Rha 3 sulfate, β[1,4]-D-Xyl-α[1,4]-L-Rha 3 sulfate, and β[1,4]-D-Xyl 2-sulfate-α[1,4]-L-Rha 3 sulfate) from Ulva sp. can be an alternative in the use of agrochemicals. Thus, the objective of this study was to assess the effect in vitro and in vivo of two marine bacteria, Stenotrophomonas rhizophila and Bacillus amyloliquefaciens, and ulvan in papaya fruit’s bio-protection against C. gloeosporioides. The capacity of marine bacteria to inhibit mycelial growth and phytopathogen spore germination in vitro through volatile organic compounds (VOCs) and carbohydrate competition was evaluated. Fruit was inoculated with bacteria, ulvan, and C. gloeosporioides and incubated at 25 °C and 90% of relative humidity (RH) for seven days. Disease incidence (%), lesion diameter (mm), and antioxidant defense enzyme activity (such as superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) were quantified. In vitro, C. gloeosporioides was inhibited by S. rhizophila and B. amyloliquefaciens. In vivo, disease incidence and the lesion diameter of anthracnose on papaya fruit were significantly reduced by marine bacteria and ulvan. Antioxidant defense enzyme activity played an important role in fruit bio-protection against C. gloeosporioides. The application of marine bacteria and ulvan can be an alternative in the sustainable postharvest management of papaya.

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Chiquito-Contreras, Roberto Gregorio, Rocio Solis-Palacios, Juan José Reyes-Pérez, Juan Reyes, Bernardo Murillo-Amador, Jorge Alejandre-Rosas und Luis Guillermo Hernández-Montiel. „Promoción del crecimiento de plantas de albahaca utilizando hongos micorrízicos arbusculares y una bacteria marina“. Acta Universitaria 28, Nr. 6 (07.02.2019): 68–76. http://dx.doi.org/10.15174/au.2018.2086.

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La fertilización con microorganismos benéficos es una alternativa para aumentar el crecimiento y la productividad de los cultivos como la albahaca (Ocimum basilicum L.). El objetivo de este estudio fue determinar el efecto de hongos micorrízicos arbusculares (HMA) y la bacteria marina Stenotrophomonas rhizophila sobre el crecimiento de albahaca var. Nufar. Adicionalmente, se determinó en la bacteria la actividad de la enzima desaminasa del ácido 1-aminociclopropano-1-carboxílico (ACC) y fijación biológica de nitrógeno (FBN). Posteriormente, plantas de albahaca fueron inoculadas con dos consorcios de HMA (ORECIB01 y SALCIB01) y la bacteria marina. Se cuantificó altura, longitud de tallo y raíz, área foliar, biomasa, clorofila, colonización micorrízica y población bacteriana. Los resultados muestran que la inoculación simultánea de ORECIB01 y bacteria promovieron significativamente todos los parámetros morfológicos y de clorofila en las plantas. La interacción HMA-bacteria incrementó la micorrización y la población bacteriana. La fertilización biológica de plantas de albahaca puede ser una opción viable en el manejo orgánico y sustentable del cultivo.

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Liu, Ying, Jie Gao, Na Wang, Xianglong Li, Na Fang und Xuliang Zhuang. „Diffusible signal factor enhances the saline-alkaline resistance and rhizosphere colonization of Stenotrophomonas rhizophila by coordinating optimal metabolism“. Science of The Total Environment 834 (August 2022): 155403. http://dx.doi.org/10.1016/j.scitotenv.2022.155403.

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Güler Güney, İnci, Sibel Derviş, Göksel Özer, Hüsnü Aktaş und Mehmet Ata Keske. „Determination of Antagonistic Activities of Endophytic Bacteria Isolated from Different Wheat Genotypes Against Fusarium culmorum“. Uluslararası Tarım ve Yaban Hayatı Bilimleri Dergisi 10, Nr. 1 (08.01.2024): 96–116. http://dx.doi.org/10.24180/ijaws.1386741.

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This study aimed to evaluate the physiological and biochemical properties and enzyme activities of endophytic bacteria obtained from different wheat genotypes, as well as their effectiveness against Fusarium culmorum, which causes root and crown rot in wheat. The results obtained from double culture tests of isolates against F. culmorum showed that the inhibition rate varied between 80.56% and 13.90%. The inhibition rate against F. culmorum was 80.59% for Bacillus subtilis (MM11), 69.41% for Stenotrophomonas maltophilia (EY5), and 61.10% for Enterobacter sp. (MY3) under in vitro conditions, the most effective isolates. Pseudomonas putida (EM9) and Pseudomonas orientalis (MM21) isolates gave positive results in all tests in the production of amylase, cellulase, phosphatase, ACC deaminase, and siderophore. To identify six promising isolates, 16S rRNA gene-based sequence analysis was utilized. The efficacy of bacterial strains against F. culmorum, pot experiments were conducted in a growth room (in vivo). The results demonstrated that the combination of S. maltophilia, Enterobacter sp., and B. subtilis (MY3+EY5+MM11) yielded the most favorable outcomes in terms of disease severity, plant height, wet weight, dry weight, root wet weight, and root dry weight. The combination of Stenotrophomonas rhizophila, P. putida, and P. orientalis (EY1+EM9+MM21) exhibited promising results. Utilizing effective bacterial strains is anticipated to reduce the dependence on and costs associated with chemical fertilizers and pesticides while minimizing their environmental impact. Furthermore, these strains show potential for commercial applications pending further validation procedures. The findings from this study significantly contribute to the field of biological control strategies against F. culmorum by leveraging the diverse capabilities of endophytic bacteria.

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Yin, Panqing, Qin Zhang, Jianming Zhu, Guoqiang Wu, Sanjun Yin, Zhenhua Ma und Jin Zhou. „The data of genomic and phenotypic profiles of the N-acyl homoserine lactone-producing algicidal bacterium Stenotrophomonas rhizophila GA1“. Data in Brief 21 (Dezember 2018): 966–71. http://dx.doi.org/10.1016/j.dib.2018.10.051.

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Reyes-Perez, J. J., L. G. Hernandez-Montiel, S. Vero, J. C. Noa-Carrazana, E. E. Quiñones-Aguilar und G. Rincón-Enríquez. „Postharvest biocontrol of Colletotrichum gloeosporioides on mango using the marine bacterium Stenotrophomonas rhizophila and its possible mechanisms of action“. Journal of Food Science and Technology 56, Nr. 11 (29.07.2019): 4992–99. http://dx.doi.org/10.1007/s13197-019-03971-8.

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Gao, Jie, Shimin Wu, Ying Liu, Shanghua Wu, Cancan Jiang, Xianglong Li, Rui Wang, Zhihui Bai, Guoqiang Zhuang und Xuliang Zhuang. „Characterization and transcriptomic analysis of a highly Cr(VI)-resistant and -reductive plant-growth-promoting rhizobacterium Stenotrophomonas rhizophila DSM14405T“. Environmental Pollution 263 (August 2020): 114622. http://dx.doi.org/10.1016/j.envpol.2020.114622.

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Yudono, Bambang, Sari Ulfariani, Fatma Fatma, Parwiyanti Parwiyanti und Eka Lidiasari. „POME Processing with Bioremediation Using Indigenous Bacteria (Bacillus toyonensis and Stenotrophomonas rhizophila), Electrocoagulation, and Bioremediation assisted with Electrocoagulation Methods“. Indonesian Journal of Fundamental and Applied Chemistry 7, Nr. 3 (25.10.2022): 122–35. http://dx.doi.org/10.24845/ijfac.v7.i3.122.

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Palm oil mill effluent (POME) is wastewater containing dissolved materials with concentrations above the threshold. Generally, POME processing in Indonesia uses an open pond system. It is less efficient because it requires large areas and causing greenhouse gas effects. This research aims to improve the POME processing, three methods were studied; bioremediation using enrich indigent lypholitics bacteria (Bacillus toyonensis and Stenotrophomonas rhizophila.), electrocoagulation system, and combination of those methods. The parameters were measured were oil and fat contents, COD, pH, TSS, TDS, Fe and Cu metals. In the electrocoagulation method, the electrodes were used iron electrodes with a variation of electrical voltage 1.5, 3, 4.5 and 6 V. The bioremediation using indigent bacteria results in the removal of oil and fat -74.62%, COD -52.44%, TSS -43.11% and pH 6.38 at the incubation time for 6 days, TDS 21.42%, Fe -5.3% and Cu -64.70%. The electrocoagulation methods results oil and fat removal were -93.27%, COD was -85.71%, TDS -39%, TSS -84%, Cu -46%, Fe +92.35%, and pH 11.39 at a voltage of 6 V for 6 h. The combination of the two methods can reduce oil and fat levels by -87.39%, COD -56.70%, TDS -0.42%, TSS +15.88%, Cu -23.33%, Fe +93.74% and pH 8.82. The three methods were studied can improve the POME processing significantly.

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Virupakshappa, Praveen Kumar Siddalingappa, Manjunatha Bukkambudhi Krishnaswamy, Gaurav Mishra und Mohammed Ameenuddin Mehkri. „Optimization of Crude Oil and PAHs Degradation by Stenotrophomonas rhizophila KX082814 Strain through Response Surface Methodology Using Box-Behnken Design“. Biotechnology Research International 2016 (28.12.2016): 1–13. http://dx.doi.org/10.1155/2016/4769542.

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The present paper describes the process optimization study for crude oil degradation which is a continuation of our earlier work on hydrocarbon degradation study of the isolate Stenotrophomonas rhizophila (PM-1) with GenBank accession number KX082814. Response Surface Methodology with Box-Behnken Design was used to optimize the process wherein temperature, pH, salinity, and inoculum size (at three levels) were used as independent variables and Total Petroleum Hydrocarbon, Biological Oxygen Demand, and Chemical Oxygen Demand of crude oil and PAHs as dependent variables (response). The statistical analysis, via ANOVA, showed coefficient of determination R2 as 0.7678 with statistically significant P value 0.0163 fitting in second-order quadratic regression model for crude oil removal. The predicted optimum parameters, namely, temperature, pH, salinity, and inoculum size, were found to be 32.5°C, 9, 12.5, and 12.5 mL, respectively. At this optimum condition, the observed and predicted PAHs and crude oil removal were found to be 71.82% and 79.53% in validation experiments, respectively. The % TPH results correlate with GC/MS studies, BOD, COD, and TPC. The validation of numerical optimization was done through GC/MS studies and % removal of crude oil.

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Kusstatscher, Peter, Wisnu Adi Wicaksono, Dhivya P. Thenappan, Eveline Adam, Henry Müller und Gabriele Berg. „Microbiome Management by Biological and Chemical Treatments in Maize Is Linked to Plant Health“. Microorganisms 8, Nr. 10 (30.09.2020): 1506. http://dx.doi.org/10.3390/microorganisms8101506.

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The targeted application of plant growth-promoting rhizobacteria (PGPR) provides the key for a future sustainable agriculture with reduced pesticide application. PGPR interaction with the indigenous microbiota is poorly understood, but essential to develop reliable applications. Therefore, Stenotrophomonas rhizophila SPA-P69 was applied as a seed coating and in combination with a fungicide based on the active ingredients fludioxonil, metalaxyl-M, captan and ziram. The plant performances and rhizosphere compositions of treated and non-treated maize plants of two field trials were analyzed. Plant health was significantly increased by treatment; however, overall corn yield was not changed. By applying high-throughput amplicon sequencing of the 16S rRNA and the ITS genes, the bacterial and fungal changes in the rhizosphere due to different treatments were determined. Despite the fact that treatments had a significant impact on the rhizosphere microbiota (9–12%), the field site was identified as the main driver (27–37%). The soil microbiota composition from each site was significantly different, which explains the site-specific effects. In this study we were able to show the first indications how PGPR treatments increase plant health via microbiome shifts in a site-specific manner. This way, first steps towards a detailed understanding of PGPRs and developments of consistently efficient applications in diverse environments are made.

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ZAINI, NURUL AQILAH MOHD, HANIS HAZEERA HARITH, AKANBI TAIWO OLUSESAN, ANWARUL HIDAYAH ZULKIFLI, FATIMAH ABU BAKAR, AZIZAH OSMAN, AZIZAH ABD HAMID und NAZAMID SAARI. „Level of Chemical and Microbiological Contaminations in Chili Bo (Paste)“. Journal of Food Protection 73, Nr. 3 (01.03.2010): 541–46. http://dx.doi.org/10.4315/0362-028x-73.3.541.

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The objective of this study was to determine the level of preservatives and microbiological loads in various brands of commercially available chili bo (paste). Fifteen different brands of chili bo obtained from the local market and hypermarkets were analyzed for pH, moisture and benzoic acid content, microbiological loads (aerobic, anaerobic, aerobic spores, and fungi), and thermophilic microorganisms. Results showed that both moisture content and pH vary among samples. The concentrations of benzoic acid detected in chili bo were found to be in the range of 537 to 5,435 mg/kg. Nine of fifteen brands were found to exceed the maximum level permitted by the Malaysian Food Law in accordance with the Codex Alimentarius (1,000 mg/kg for benzoic acid). An apparent correlation between benzoic acid concentration and microbiological loads present in the chili bo was observed. The microbiological loads were found to be relatively low in the end products containing high amounts of benzoic acid. The heat-resistant (70 to 80°C) microorganisms present in chili bo were identified as Ochrobacterum tritici, Stenotrophomonas rhizophila, Microbacterium maritypicum, Roseomonas spp., CDC group II-E subgroup A, Flavimonas oryzihabitans, and Pseudomonas aeruginosa, with M. maritypicum being the most frequently found (in 9 of 15 samples) microorganism. Most of these identified microorganisms were not known to cause foodborne illnesses.

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Sangiorgio, Daniela, Antonio Cellini, Francesco Spinelli und Irene Donati. „Promoting Strawberry (Fragaria × ananassa) Stress Resistance, Growth, and Yield Using Native Bacterial Biostimulants“. Agronomy 13, Nr. 2 (11.02.2023): 529. http://dx.doi.org/10.3390/agronomy13020529.

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Strawberry production is challenged by several abiotic and biotic stresses, such as drought, soil salinity, and the angular leaf spot (ALS) disease caused by Xanthomonas fragariae. In recent decades, the development of commercial products containing combinations of different Plant-Growth-Promoting (PGP) microorganisms has been one of the main focuses of agricultural research. However, their results are often erratic depending on crop species, environmental conditions, and competition among the different strains or indigenous plant microbiota. The use of beneficial microorganisms selected from the crop-specific microbiota may help overcome this limitation, promoting their utilization for sustainable agriculture. The culturable bacteriota of strawberry plants was screened to identify PGP activities in vitro. Bacterial isolates were tested in vivo on strawberry plants in both optimal and stress (X. fragariae infection or salinity) conditions, allowing the selection of strains of Pseudomonas fluorescens, Stenotrophomonas rhizophila, and Agrobacterium rubi whose application showed a significant increase in plant growth and fruit production (up to seven-fold), even under stress conditions, and the ability to control ALS by over 50%. Potential synergistic effects among PGP isolates were tested by coordinated inoculation. However, plant growth and fruit quality were not promoted, except for fruit weight and size, by coordinate inoculation in comparison to m23 and m27 single-strain treatment.

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Egamberdieva, Dilfuza, Dilfuza Jabborova und Gabriele Berg. „Synergistic interactions between Bradyrhizobium japonicum and the endophyte Stenotrophomonas rhizophila and their effects on growth, and nodulation of soybean under salt stress“. Plant and Soil 405, Nr. 1-2 (08.09.2015): 35–45. http://dx.doi.org/10.1007/s11104-015-2661-8.

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Silambarasan, Sivagnanam, Peter Logeswari, Antonieta Ruiz, Pablo Cornejo und Velu Rajesh Kannan. „Influence of plant beneficial Stenotrophomonas rhizophila strain CASB3 on the degradation of diuron-contaminated saline soil and improvement of Lactuca sativa growth“. Environmental Science and Pollution Research 27, Nr. 28 (25.06.2020): 35195–207. http://dx.doi.org/10.1007/s11356-020-09722-z.

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Praveen Kumar, S. V., und B. K. Manjunatha. „Studies on hydrocarbon degradation by the bacterial isolate Stenotrophomonas rhizophila (PM-1) from oil spilled regions of Western Ghats of Karnataka“. Science, Technology and Arts Research Journal 4, Nr. 3 (29.08.2016): 139. http://dx.doi.org/10.4314/star.v4i3.21.

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Rivas-Garcia, Tomas, Bernardo Murillo-Amador, Alejandra Nieto-Garibay, Gabriel Rincon-Enriquez, Roberto G. Chiquito-Contreras und Luis G. Hernandez-Montiel. „Enhanced biocontrol of fruit rot on muskmelon by combination treatment with marine Debaryomyces hansenii and Stenotrophomonas rhizophila and their potential modes of action“. Postharvest Biology and Technology 151 (Mai 2019): 61–67. http://dx.doi.org/10.1016/j.postharvbio.2019.01.013.

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Wei, Yi, Lanhui Li, Wenjun Hu, Huiyan Ju, Mingzhe Zhang, Qingming Qin, Shihong Zhang und Guihua Li. „Suppression of Rice Blast by Bacterial Strains Isolated from Cultivated Soda Saline-Sodic Soils“. International Journal of Environmental Research and Public Health 17, Nr. 14 (21.07.2020): 5248. http://dx.doi.org/10.3390/ijerph17145248.

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Rice blast caused by Magnaporthe oryzae is one of the most serious rice diseases worldwide. Biological control is gaining popularity as a promising method for the control of this disease; however, more effective microbial strains with strong adaptability in rice fields need to be identified. Here, we report for the first time the successful identification of biocontrol bacterial strains from frozen soils of the soda saline-sodic land. We isolated 82 bacterial strains from rice fields in the western Songnen Plain of China, one of the three major soda saline soils in the world. Five of the isolated strains exhibited strong inhibition to M. oryzae growth. The potential strains were identified as Bacillus safensis JLS5, Pseudomonas koreensis JLS8, Pseudomonas saponiphila JLS10, Stenotrophomonas rhizophila JLS11 and Bacillus tequilensis JLS12, respectively, by 16s RNA gene sequence analysis. The antagonistic assay and the artificial inoculation tests showed that JLS5 and JLS12 could effectively inhibit conidial germination and pathogenicity of the rice blast fungus, both preventively and curatively. The suppression of pathogenicity was further confirmed by greenhouse experiments, showing the effectiveness of JLS5 and JLS12 as a potential biological control agents of M. oryzae. The potential application of these cold-tolerant strains for rice blast control in cold regions is discussed. Our data suggest that soda saline-sodic soils are a rich source for biocontrol strain isolation.

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Mehedi, Md Nazmul Hasan, Mahbub Robbani, Md Fakhrul Hasan, Habibur Rahman, Md Nazmul Hasan Mehedi und Shah Md Asraful Islam. „Isolation, screening and molecular identification of antagonistic bacteria against Colletotrichum gloeosporioides in mango“. Archives of Agriculture and Environmental Science 7, Nr. 3 (25.09.2022): 432–39. http://dx.doi.org/10.26832/24566632.2022.0703018.

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The study was conducted at the Postharvest and plant Biotechnology laboratory, Department of Horticulture, Patuakhali Science and Technology University, Patuakhali, Bangladesh during the period from January to July 2017 to isolate, screening and molecular identification of antagonistic bacteria against anthracnose of mango. All treatments were arranged in a completely randomized design (CRD) with replications and repeated twice. Epiphytic bacteria, isolated from leaf and fruit surfaces of mango, were tested as biocontrol agent against anthracnose disease caused by Colletotrichum gloeosporioides wherein 20 strains were confirmed as antagonistic. Molecular characterization of the three potential strains of bacteria were done by the amplification of 16S rDNA gene following the extraction of genomic DNA, polymerase chain reaction (PCR) amplification, gel electrophoresis and gel documentation. The PCR amplified products and the genomic DNA samples were sent to the Macrogen Company through Sunchon National University, Seoul, South Korea for molecular identification by sequence analysis. Among the 20 antagonistic bacteria screened in vitro by dual and concomitant tests, two isolates, namely GB6 (PSTU-Hort-8), and GB19 (PSTU-Hort-14) were recognized as antagonistics to the test fungus. Using the molecular identification systems, isolated bacterial strains PSTU-Hort-8 was identified as B. subtilis with National Center for Biotechnology Information (NCBI) accession numbers MW659188; on the other hand, strain PSTU-Hort-14 was identified as Stenotrophomonas rhizophila with NCBI accession number MW659190.

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Liu, Min, Xu Liu, Bao-Sen Cheng, Xue-Lei Ma, Xiao-Tong Lyu, Xian-Fang Zhao, Yan-Lun Ju, Zhuo Min, Zhen-Wen Zhang und Yu-Lin Fang. „Selection and evaluation of phosphate-solubilizing bacteria from grapevine rhizospheres for use as biofertilizers“. Spanish Journal of Agricultural Research 14, Nr. 4 (02.12.2016): e1106. http://dx.doi.org/10.5424/sjar/2016144-9714.

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Phosphate-solubilizing bacteria (PSB) have the ability to solubilize insoluble phosphorus (P) and release soluble P. Extensive research has been performed with respect to PSB isolation from the rhizospheres of various plants, but little is known about the prevalence of PSB in the grapevine rhizosphere. In this study, we aimed to isolate and identify PSB from the grapevine rhizosphere in five vineyards of Northwest China, to characterize their plant-growth-promoting (PGP) traits, evaluate the effect of stress on their phosphate-solubilizing activity (PSA), and test their ability to stimulate the growth of Vitis vinifera L. cv. Cabernet Sauvignon. From the vineyard soils, 66 PSB isolates were screened, and 10 strains with high PSA were identified by 16S rRNA sequencing. Sequence analysis revealed that these 10 strains belonged to 4 genera and 5 species: Bacillus aryabhattai, B. megaterium, Klebsiella variicola, Stenotrophomonas rhizophila, and Enterobacter aerogenes. The selected PSB strains JY17 (B. aryabhattai) and JY22 (B. aryabhattai) were positive for multiple PGP traits, including nitrogen fixation and production of indole acetic acid (IAA), siderophores, 1-aminocyclopropane-1-carboxylate (ACC) deaminase, chitinase, and protease. JY17 and JY22 showed strong PSA under stress conditions of high pH, high salt, and high temperature. Therefore, these two isolates can be used as biofertilizers in saline-alkaline soils. The inoculation with PSB significantly facilitated the growth of V. vinifera cv. Cabernet Sauvignon under greenhouse conditions. Use of these PSB as biofertilizers will increase the available P content in soils, minimize P-fertilizer application, reduce environmental pollution, and promote sustainable agriculture.

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Li, Yanlin, Jixiang Chen, Yonggang Wang, Dan Ma und Wenhong Rui. „The effects of the recombinant YeaZ of Vibrio harveyi on the resuscitation and growth of soil bacteria in extreme soil environment“. PeerJ 8 (21.12.2020): e10342. http://dx.doi.org/10.7717/peerj.10342.

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Numerous bacteria entered the viable but non-culturable state due to the stresses of dry and salt in soils. YeaZ of Gram-negative bacteria is a resuscitation promoting factor (Rpf) homologous protein could resuscitate bacteria of natural environment in VBNC state. To investigate the promoting effect of YeaZ on the isolation of viable but non-culturable (VBNC) bacteria from soil samples in extreme environments, the recombinant YeaZ of Vibrio harveyi was prepared and added to the soil samples from volcanic soil and saline soil in Northwest China. The study has shown that YeaZ can promote the recovery and growth of soil microorganisms, and the number of cultivable bacteria in volcanic and saline soil has increased from 0.17 × 103 and 2.03 × 103 cfu⋅ml−1 to 1.00 × 103 and 5.55 × 103 cfu⋅ml−1, respectively. The 16S rDNA gene sequencing and phylogenetic analysis showed that YeaZ played an essential role in the increase of composition and diversity of bacteria. A total of 13 bacterial strains were isolated from the volcanic soil samples, which belong to phyla Actinobacteria, Firmicutes and Gamma-proteobacteria. Four species, including Ornithinimicrobium kibberense, Agrococcus citreus, Stenotrophomonas rhizophila and Pseudomonas zhaodongensis were found in the control group, while Micrococcus antarcticus, Kocuria rose, Salinibacterium xinjiangense, Planococcus antarcticus, Ornithinimicrobium kibberense and Pseudomonas zhaodongensis were isolated from the treatment groups (addition of YeaZ). Twenty-one strains were isolated from the saline soil samples, including eight species from the control group and thirteen species from the treatment groups, among which nine species were only found, including Bacillus oceanisediminis, Brevibacillus brevis, Paenibacillus xylanilyticus, Microbacterium maritypicum, B. subtilis, B. alcalophilus, B. niabensis, Oceanimonas doudoroffii and Zobellella taiwanensis. The results suggest that addition of YeaZ to soil samples can promote the recovery of VBNC. This method has the implications for the discovery of VBNC bacteria that have potential environmental functions.

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Roodi, Davood, James P. Millner, Craig McGill, Richard D. Johnson, Ruy Jauregui und Stuart D. Card. „Methylobacterium, a major component of the culturable bacterial endophyte community of wild Brassica seed“. PeerJ 8 (10.07.2020): e9514. http://dx.doi.org/10.7717/peerj.9514.

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Background Plants are commonly colonized by a wide diversity of microbial species and the relationships created can range from mutualistic through to parasitic. Microorganisms that typically form symptomless associations with internal plant tissues are termed endophytes. Endophytes associate with most plant species found in natural and managed ecosystems. They are extremely important plant partners that provide improved stress tolerance to the host compared with plants that lack this symbiosis. Plant domestication has reduced endophyte diversity and therefore the wild relatives of many crop species remain untapped reservoirs of beneficial microbes. Brassica species display immense diversity and consequently provide the greatest assortment of products used by humans from a single plant genus important for agriculture, horticulture, bioremediation, medicine, soil conditioners, composting crops, and in the production of edible and industrial oils. Many endophytes are horizontally transmitted, but some can colonize the plant’s reproductive tissues, and this gives these symbionts an efficient mechanism of propagation via plant seed (termed vertical transmission). Methods This study surveyed 83 wild and landrace Brassica accessions composed of 14 different species with a worldwide distribution for seed-originating bacterial endophytes. Seed was stringently disinfected, sown within sterile tissue culture pots within a sterile environment and incubated. After approximately 1-month, direct isolation techniques were used to recover bacterial endophytes from roots and shoots of symptomless plants. Bacteria were identified based on the PCR amplification of partial 16S rDNA gene sequences and annotated using the BLASTn program against the NCBI rRNA database. A diversity index was used as a quantitative measure to reflect how many different bacterial species there were in the seed-originating microbial community of the Brassica accessions sampled. Results Bacterial endophytes were recovered from the majority of the Brassica accessions screened. 16S rDNA gene sequencing identified 19 different bacterial species belonging to three phyla, namely Actinobacteria, Firmicutes and Proteobacteria with the most frequently isolated species being Methylobacterium fujisawaense, Stenotrophomonas rhizophila and Pseudomonas lactis. Methylobacterium was the dominant genus composing 56% of the culturable isolated bacterial community and was common in 77% of accessions possessing culturable bacterial endophytes. Two selected isolates of Methylobacterium significantly promoted plant growth when inoculated into a cultivar of oilseed rape and inhibited the growth of the pathogen Leptosphaeria maculans in dual culture. This is the first report that investigates the seed-originating endophytic microorganisms of wild Brassica species and highlights the Brassica microbiome as a resource for plant growth promoting bacteria and biological control agents.

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Muhammad Ibrahim and Hassan Abdullahi Kawo und A. H. Kawo. „SALT TOLERANCE CAPACITY OF BACTERIA ISOLATED FROM IRRIGATED SOIL IN KANO, NIGERIA“. FUDMA JOURNAL OF SCIENCES 6, Nr. 2 (11.05.2022): 43–48. http://dx.doi.org/10.33003/fjs-2022-0602-872.

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Abstract This study characterized and screened NaCl tolerance in some bacterial isolates from irrigated soil of Bagwai, Kano State, Nigeria. The soil used for the study was sampled from Irrigation sites using random sampling method. The physicochemical properties and bacteriological characteristics of the soil sample were determined using culture, morphological, biochemical and molecular methods. The soil pH and electrical conductivity were 7.33 and 8.02 dSm-1 respectively. The total nitrogen and available phosphorus from the study area were 0.118% and 3.96 mgkg-1 respectively. The organic carbon recorded a very low content of 0.183%. Moisture content was 080% while temperature was found to be 29oC respectively. Bacteria isolated were identified as B subtilis, S rhizophilia and K pneumoniae. Further comfirmation using 16s rRNA sequencing showed the occurrence of Stenotrophomonas rhizophilia SBANHCu 14 (99.55%) and Klebisella pneumoniae GX 14 (98.68%). All the two bacterial isolates were able to tolerate salt concentration up to 20% but optimum tolerance was observed at 5%.

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Siti Zulaiha, Abdul Munif und Abdjad Asih Nawangsih. „Potential of the Endophytic Bacteria from Lantana camara, Palm Oil, and Mangroves to control Meloidogyne spp. on Eggplant“. Jurnal Fitopatologi Indonesia 18, Nr. 5 (22.12.2022): 213–21. http://dx.doi.org/10.14692/jfi.18.5.213-221.

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Nematoda puru akar (NPA) Meloidogyne spp. merupakan salah satu patogen penting pada tanaman terung. Puru akar sangat merugikan karena menurunkan hasil produksi. Penelitian ini bertujuan mendapatkan bakteri endofit dari Lantana camara dan mengevaluasinya bersama bakteri endofit dari akar kelapa sawit, dan mangrove yang berpotensi untuk mengendalikan Meloidogyne spp. dan menentukan pengaruhnya pada pertumbuhan tanaman terung, serta mengidentifikasi bakteri endofit yang potensial sebagai agens pengendalian hayati. Potensi agens hayati mengacu pada hasil pengujian uji mortalitas, uji senyawa organik volatil (SOV) dan uji penekanan puru akar dievaluasi dengan mengukur persentase penurunan jumlah puru, kerusakan akar, dan jumlah paket telur. Hasil uji menunjukkan seluruh isolat bakteri endofit berpotensi menyebabkan mortalitas, menghasilkan SOV, dan dapat menekan persentase jumlah puru pada akar, serta memberikan pengaruh terhadap bobot dan tinggi tanaman. Bakteri endofit LCA5 dan LCA13 menyebabkan mortalitas lebih dari 90% terhadap Meloidogyne spp. J2. Selama 24 jam dan pada uji SOV menyebabkan mortalitas lebih dari 60% selama 24 jam. Bakteri endofit yang memiliki potensi sebagai pengendalian hayati diidentifikasi sebagai Dyella marensis, Stenotrophomonas rhizophilla, dan Providencia vermicola.

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Броварська, О. С., und Л. Д. Варбанець. „Характеристика ліпополісахариду Stenotrophomonas rhizophila, представника Антарктики“. Problems of Environmental Biotechnology, Nr. 1 (12.12.2023). http://dx.doi.org/10.18372/2306-6407.1.18025.

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Raio, Aida, Federico Brilli, Luisa Neri, Rita Baraldi, Francesca Orlando, Claudio Pugliesi, Xiaoyulong Chen und Ivan Baccelli. „Stenotrophomonas rhizophila Ep2.2 inhibits growth of Botrytis cinerea through the emission of volatile organic compounds, restricts leaf infection and primes defense genes“. Frontiers in Plant Science 14 (02.10.2023). http://dx.doi.org/10.3389/fpls.2023.1235669.

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The bacterium Stenotrophomonas rhizophila is known to be beneficial for plants and has been frequently isolated from the rhizosphere of crops. In the present work, we isolated from the phyllosphere of an ornamental plant an epiphytic strain of S. rhizophila that we named Ep2.2 and investigated its possible application in crop protection. Compared to S. maltophilia LMG 958, a well-known plant beneficial species which behaves as opportunistic human pathogen, S. rhizophila Ep2.2 showed distinctive features, such as different motility, a generally reduced capacity to use carbon sources, a greater sensitivity to fusidic acid and potassium tellurite, and the inability to grow at the human body temperature. S. rhizophila Ep2.2 was able to inhibit in vitro growth of the plant pathogenic fungi Alternaria alternata and Botrytis cinerea through the emission of volatile compounds. Simultaneous PTR-MS and GC-MS analyses revealed the emission, by S. rhizophila Ep2.2, of volatile organic compounds (VOCs) with well-documented antifungal activity, such as furans, sulphur-containing compounds and terpenes. When sprayed on tomato leaves and plants, S. rhizophila Ep2.2 was able to restrict B. cinerea infection and to prime the expression of Pti5, GluA and PR1 plant defense genes.

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Mghazli, Najoua, Odile Bruneel, Rahma Zouagui, Rachid Hakkou und Laila Sbabou. „Characterization of plant growth promoting activities of indigenous bacteria of phosphate mine wastes, a first step toward revegetation“. Frontiers in Microbiology 13 (15.12.2022). http://dx.doi.org/10.3389/fmicb.2022.1026991.

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Morocco holds the vast majority of the world’s phosphate reserves, but due to the processes involved in extracting and commercializing these reserves, large quantities of de-structured, nutritionally deficient mine phosphate wastes are produced each year. In a semi-arid climate, these wastes severely hamper plant growth and development leading to huge unvegetated areas. Soil indigenous Plant Growth-Promoting Bacteria (PGPB) play a pivotal role in restauration of these phosphate mining wastes by revegetation, by increasing plants development, soil functioning, and nutrient cycling. The development of a vegetative cover above the degraded phosphate wastes, could stabilize and reintegrate these wastes in the surrounding environment. The current study’s objectives were to isolate, characterize, and identify indigenous bacterial strains, and test their PGP activity in vitro and, for the best-performing strains in planta, in order to assess their potential for acting as biofertilizers. A quantitative test for the synthesis of auxin and the production of siderophores as well as a qualitative test for the solubilization of phosphate were performed on all isolated bacterial strains. The production of hydrogen cyanide (HCN), exopolysaccharides (EPS), and enzymes were also examined. Three bacteria, selected among the best PGPB of this study, were tested in planta to determine whether such indigenous bacteria could aid plant growth in this de-structured and nutrient-poor mining soil. Using 16S rRNA gene sequencing, 41 bacterial strains were isolated and 11 genera were identified: Acinetobacter, Agrococcus, Bacillus, Brevibacterium, Microbacterium, Neobacillus, Paenibacillus, Peribacillus, Pseudarthrobacter, Stenotrophomonas, and Raoultella. Among the three best performing bacteria (related to Bacillus paramycoides, Brevibacterium anseongense, and Stenotrophomonas rhizophila), only Stenotrophomonas rhizophila and Brevibacterium anseongense were able to significantly enhance Lupinus albus L. growth. The best inoculation results were obtained using the strain related to Stenotrophomonas rhizophila, improving the plant’s root dry weight and chlorophyll content. This is also, to our knowledge, the first study to show a PGP activity of Brevibacterium anseongense.

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Garin, Tiffany, Chrystelle Brin, Anne Préveaux, Agathe Brault, Martial Briand, Marie Simonin, Matthieu Barret, Laure Journet und Alain Sarniguet. „The type VI secretion system of Stenotrophomonas rhizophilaCFBP13503 limits the transmission of Xanthomonas campestris pv. campestris 8004 from radish seeds to seedlings“. Molecular Plant Pathology 25, Nr. 1 (Januar 2024). http://dx.doi.org/10.1111/mpp.13412.

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AbstractStenotrophomonas rhizophila CFBP13503 is a seedborne commensal bacterial strain, which is efficiently transmitted to seedlings and can outcompete the phytopathogenic bacterium Xanthomonas campestris pv. campestris (Xcc8004). The type VI secretion system (T6SS), an interference contact‐dependent mechanism, is a critical component of interbacterial competition. The involvement of the T6SS of S. rhizophila CFBP13503 in the inhibition of Xcc8004 growth and seed‐to‐seedling transmission was assessed. The T6SS cluster of S. rhizophila CFBP13503 and nine putative effectors were identified. Deletion of two T6SS structural genes, hcp and tssB, abolished the competitive advantage of S. rhizophila against Xcc8004 in vitro. The population sizes of these two bacterial species were monitored in seedlings after inoculation of radish seeds with mixtures of Xcc8004 and either S. rhizophila wild‐type (wt) strain or isogenic hcp mutant. A significant decrease in the population size of Xcc8004 was observed during confrontation with the S. rhizophila wt in comparison with T6SS‐deletion mutants in germinated seeds and seedlings. We found that the T6SS distribution among 835 genomes of the Stenotrophomonas genus is scarce. In contrast, in all available S. rhizophila genomes, T6SS clusters are widespread and mainly belong to the T6SS group i4. In conclusion, the T6SS of S. rhizophila CFBP13503 is involved in the antibiosis against Xcc8004 and reduces seedling transmission of Xcc8004 in radish. The distribution of this T6SS cluster in the S. rhizophila complex could make it possible to exploit these strains as biocontrol agents against X. campestris pv. campestris.

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Pandey,, Vaibhav, D. K. Dwivedi, Harendra Singh,, S. S. Prasad, Purushottam Kumar,, Abhishek Mishra, und Anshuman Dwivedi. „Evaluation of Rhizobium along with Multifunctional Rhizobacteria for Improving the Growth and Yield of Black Gram [Vigna mungo (L.) Hepper]“. LEGUME RESEARCH - AN INTERNATIONAL JOURNAL, Of (08.08.2023). http://dx.doi.org/10.18805/lr-5175.

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Background: Indigenous rhizobial populations may be unable to achieve successful symbiosis in the field due to rare population and unfavourable soil environment. Introduced plant growth promoting rhizobacteria (PGPR) are frequently linked to faster growth, development, and yield of plant with synergetic effect on indigenous Rhizobium bacteria. Furthermore, co-inoculating legumes with both Rhizobium and PGPR is proven more effective for improving nodulation as well as growth and development of legumes. Methods: The experiment was conducted at research farm of TCA, Dholi Muzaffarpur a campus of Dr. Rajendra Prasad Central Agriculture University, Pusa, Bihar during kharif season of 2021 to investigate the “Evaluation of Rhizobium along with multifunctional Rhizobacteria for improving the growth and yield of black gram [Vigna mungo (L.) Hepper]”. There were eight number of treatments and replicated thrice in a randomized block design. The treatment comprised as T1- control, T2- Rhizobium (Bradyrhizobium spp.), T3- Rhizobium + PUK-171 (Stenotrophomonas rhizophila), T4- Rhizobium + NE 10 (Bacillus cereus), T5-Rhizobium + Pseudomonas spp., T6-Rhizobium + LMSR 45 (Pantoea agglomerans), T7-Rhizobium + Methylobacterium, T8-N as per RDF. Result: The result revealed that co-inoculation of Rhizobium + PUK-171 (Stenotrophomonas rhizophila) significantly increase the plant height, number of leaves plant-1, number of branches plant‑1, plant dry weight, crop growth rate, and in nodule studies number of nodules plant-1, dry weight of nodules recoded significantly higher result as compare to T1, T2, and T8 and found at par with rest of treatment. In yield attributing character number of pods plant-1 recorded significantly higher result in co-inoculation of Rhizobium + PUK-171 (Stenotrophomonas rhizophila) and rest of character did not produce significant effect, in case of seed yield similar trends was followed, while in case of stover yield co-inoculation of Rhizobium along with Rhizobium + NE 10 (Bacillus cereus) recorded significantly higher result as compare to T1 and T8 and at par with rest of treatments. Harvest index did not produce significant effect.

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Sun, Shangchen, Kexin Zhang, Yamiao Wu, Ning Zhu, Yonggang Wang, Jixiang Chen und Feifan Leng. „Transporter drives the biosorption of heavy metals by Stenotrophomonas rhizophila JC1“. Environmental Science and Pollution Research, 10.02.2022. http://dx.doi.org/10.1007/s11356-022-18900-0.

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Jankiewicz, Urszula, Bartosz Baranowski, Maria Swiontek Brzezinska und Magdalena Frąk. „Purification, characterization and cloning of a chitinase from Stenotrophomonas rhizophila G22“. 3 Biotech 10, Nr. 1 (10.12.2019). http://dx.doi.org/10.1007/s13205-019-2007-y.

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