Journal articles: 'Bacterial volatiles'

1

Hunziker, Lukas, Denise Bönisch, Ulrike Groenhagen, Aurélien Bailly, Stefan Schulz, and Laure Weisskopf. "Pseudomonas Strains Naturally Associated with Potato Plants Produce Volatiles with High Potential for Inhibition of Phytophthora infestans." Applied and Environmental Microbiology 81, no. 3 (November 14, 2014): 821–30. http://dx.doi.org/10.1128/aem.02999-14.

Full text

Abstract:

ABSTRACTBacteria emit volatile organic compounds with a wide range of effects on bacteria, fungi, plants, and animals. The antifungal potential of bacterial volatiles has been investigated with a broad span of phytopathogenic organisms, yet the reaction of oomycetes to these volatile signals is largely unknown. For instance, the response of the late blight-causing agent and most devastating oomycete pathogen worldwide,Phytophthora infestans, to bacterial volatiles has not been assessed so far. In this work, we analyzed this response and compared it to that of selected fungal and bacterial potato pathogens, using newly isolated, potato-associated bacterial strains as volatile emitters.P. infestanswas highly susceptible to bacterial volatiles, while fungal and bacterial pathogens were less sensitive. CyanogenicPseudomonasstrains were the most active, leading to complete growth inhibition, yet noncyanogenic ones also produced antioomycete volatiles. Headspace analysis of the emitted volatiles revealed 1-undecene as a compound produced by strains inducing volatile-mediatedP. infestansgrowth inhibition. Supplying pure 1-undecene toP. infestanssignificantly reduced mycelial growth, sporangium formation, germination, and zoospore release in a dose-dependent manner. This work demonstrates the high sensitivity ofP. infestansto bacterial volatiles and opens new perspectives for sustainable control of this devastating pathogen.

APA, Harvard, Vancouver, ISO, and other styles

2

Song, Geun Cheol, Je-Seung Jeon, Hee-Jung Sim, Soohyun Lee, Jihye Jung, Sang-Gyu Kim, Sun Young Moon, and Choong-Min Ryu. "Dual functionality of natural mixtures of bacterial volatile compounds on plant growth." Journal of Experimental Botany 73, no. 2 (October 22, 2021): 571–83. http://dx.doi.org/10.1093/jxb/erab466.

Full text

Abstract:

Abstract Bacteria emit volatile compounds that modulate plant growth. Previous studies reported the impacts of bacterial volatile compounds on plant growth; however, the results varied depending on bacterial nutrient availability. We investigated whether the effects of plant growth–inhibiting volatiles (PGIVs) and plant growth–promoting volatiles (PGPVs) depended on the perceived dose by evaluating the growth of Arabidopsis thaliana seedlings placed at 7, 14, and 21 cm away from Bacillus amyloliquefaciens GB03 colonies growing in rich medium. A large bacterial colony (500 μl inoculum) inhibited plant growth at 7 cm and promoted growth at 21 cm, whereas a small bacterial colony (100 μl inoculum) induced the opposite pattern of response. We identified pyrazine and 2,5-dimethylpyrazine as candidate PGIVs that significantly reduced plant growth at a distance of 7 cm. PGIV effects were validated by exposing plants to synthetic 2,5-dimethylpyrazine and bacteria emitting PGPVs, which showed that PGIVs overwhelm PGPVs to rapidly increase salicylic acid content and related gene expression. This is referred to as the defence-growth trade-off. Our results indicate that high PGIV concentrations suppress plant growth and promote immunity, whereas low PGPV concentrations promote growth. This study provides novel insights into the complex effects of bacterial volatile mixtures and fine-tuning of bacteria-plant interactions.

APA, Harvard, Vancouver, ISO, and other styles

3

Silva Dias, Bruno Henrique, Sung-Hee Jung, Juliana Velasco de Castro Oliveira, and Choong-Min Ryu. "C4 Bacterial Volatiles Improve Plant Health." Pathogens 10, no. 6 (May 31, 2021): 682. http://dx.doi.org/10.3390/pathogens10060682.

Full text

Abstract:

Plant growth-promoting rhizobacteria (PGPR) associated with plant roots can trigger plant growth promotion and induced systemic resistance. Several bacterial determinants including cell-wall components and secreted compounds have been identified to date. Here, we review a group of low-molecular-weight volatile compounds released by PGPR, which improve plant health, mostly by protecting plants against pathogen attack under greenhouse and field conditions. We particularly focus on C4 bacterial volatile compounds (BVCs), such as 2,3-butanediol and acetoin, which have been shown to activate the plant immune response and to promote plant growth at the molecular level as well as in large-scale field applications. We also disc/ uss the potential applications, metabolic engineering, and large-scale fermentation of C4 BVCs. The C4 bacterial volatiles act as airborne signals and therefore represent a new type of biocontrol agent. Further advances in the encapsulation procedure, together with the development of standards and guidelines, will promote the application of C4 volatiles in the field.

APA, Harvard, Vancouver, ISO, and other styles

4

Gfeller, Aurélie, Pascal Fuchsmann, Mout De Vrieze, Katia Gindro, and Laure Weisskopf. "Bacterial Volatiles Known to Inhibit Phytophthora infestans Are Emitted on Potato Leaves by Pseudomonas Strains." Microorganisms 10, no. 8 (July 26, 2022): 1510. http://dx.doi.org/10.3390/microorganisms10081510.

Full text

Abstract:

Bacterial volatiles play important roles in mediating beneficial interactions between plants and their associated microbiota. Despite their relevance, bacterial volatiles are mostly studied under laboratory conditions, although these strongly differ from the natural environment bacteria encounter when colonizing plant roots or shoots. In this work, we ask the question whether plant-associated bacteria also emit bioactive volatiles when growing on plant leaves rather than on artificial media. Using four potato-associated Pseudomonas, we demonstrate that potato leaves offer sufficient nutrients for the four strains to grow and emit volatiles, among which 1-undecene and Sulfur compounds have previously demonstrated the ability to inhibit the development of the oomycete Phytophthora infestans, the causative agent of potato late blight. Our results bring the proof of concept that bacterial volatiles with known plant health-promoting properties can be emitted on the surface of leaves and warrant further studies to test the bacterial emission of bioactive volatiles in greenhouse and field-grown plants.

APA, Harvard, Vancouver, ISO, and other styles

5

Warr, Jennifer, Fenny Dane, and Bob Ebel. "Effect of C6-Volatiles on Bioluminescent Plant Pathogens." HortScience 33, no. 3 (June 1998): 557d—557. http://dx.doi.org/10.21273/hortsci.33.3.557d.

Full text

Abstract:

C6 volatile compounds are known to be produced by the plant upon pathogen attack or other stress-related events. The biological activity of many of these substances is poorly understood, but some might produce signal molecules important in host–pathogen interactions. In this research we explored the possibility that lipid-derived C6 volatiles have a direct effect on bacterial plant pathogens. To this purpose we used a unique tool, a bacterium genetically engineered to bioluminesce. Light-producing genes from a fish-associated bacterium were introduced into Xanthomonas campestris pv. campestris, enabling nondestructive detection of bacteria in vitro and in the plant with special computer-assisted camera equipment. The effects of different C6 volatiles (trans-2 hexanal, trans-2 hexen-1-ol and cis-3 hexenol) on growth of bioluminescent Xanthomonas campestris were investigated. Different volatile concentrations were used. Treatment with trans-2 hexanal appeared bactericidal at low concentrations (1% and 10%), while treatments with the other volatiles were not inhibitive to bacterial growth. The implications of these results with respect to practical use of trans-2 hexanal in pathogen susceptible and resistant plants will be discussed.

APA, Harvard, Vancouver, ISO, and other styles

6

Papaioannou, Georgia, Ioanna Kosma, Anastasia V. Badeka, and Michael G. Kontominas. "Profile of Volatile Compounds in Dessert Yogurts Prepared from Cow and Goat Milk, Using Different Starter Cultures and Probiotics." Foods 10, no. 12 (December 20, 2021): 3153. http://dx.doi.org/10.3390/foods10123153.

Full text

Abstract:

The purpose of this study was to determine the profile of volatile compounds (aroma) and overall flavor in dessert yogurts prepared from cow and goat milk, using three different, commercially available starter cultures, in the presence or absence of probiotic bacteria and to correlate this to organoleptic evaluation results obtained using a consumer acceptability method. The extraction of volatile compounds was carried out by solid phase micro-extraction; separation and analysis by gas chromatography-mass spectrometry. Variations among the different classes of compounds (i.e., aldehydes, alcohols, ketones, volatile acids, hydrocarbons, and terpenes) were recorded for different treatments. The results showed that the main volatiles in the cow milk dessert yogurts without Bifidobacterium BB-12 were: acetaldehyde, 2,3-butanedione, 2,3-pentanedione, 3-OH-2-butanone, 2-propanone, hexanoic acid and limonene). Respective volatiles in cow milk dessert yogurts with Bifidobacterium BB-12 were: acetaldehyde, pentanal, hexanal, the same ketones, acetic acid and limonene). The volatiles in goat milk dessert yogurts without Lactobacillus acidophilus LA-5 were: acetaldehyde, the same ketones, no carboxylic acids, limonene, camphene, α- and β-pinene. Respective volatiles in goat milk dessert yogurts with Lactobacillus acidophilus LA-5 were: aldehydes acetaldehyde, the same ketones, butanoic acid, α-pinene and camphene varying in concentration in different samples. Based on the results of volatiles and organoleptic evaluation, it can be concluded that dessert yogurts from cow milk without probiotic bacterial strains using the mild and classic starter cultures, and dessert yogurts from goat milk with probiotic bacterial strains using the classic and acidic starter cultures are found to be more organoleptically acceptable by consumers. In most cases, a positive correlation was found between dessert yogurt organoleptically determined flavor and volatiles (aldehydes, ketones and carboxylic acids).

APA, Harvard, Vancouver, ISO, and other styles

7

Blom, Dirk, Carlotta Fabbri, Leo Eberl, and Laure Weisskopf. "Volatile-Mediated Killing ofArabidopsis thalianaby Bacteria Is Mainly Due to Hydrogen Cyanide." Applied and Environmental Microbiology 77, no. 3 (November 29, 2010): 1000–1008. http://dx.doi.org/10.1128/aem.01968-10.

Full text

Abstract:

ABSTRACTThe volatile-mediated impact of bacteria on plant growth is well documented, and contrasting effects have been reported ranging from 6-fold plant promotion to plant killing. However, very little is known about the identity of the compounds responsible for these effects or the mechanisms involved in plant growth alteration. We hypothesized that hydrogen cyanide (HCN) is a major factor accounting for the observed volatile-mediated toxicity of some strains. Using a collection of environmental and clinical strains differing in cyanogenesis, as well as a defined HCN-negative mutant, we demonstrate that bacterial HCN accounts to a significant extent for the deleterious effects observed when growingArabidopsis thalianain the presence of certain bacterial volatiles. The environmental strainPseudomonas aeruginosaPUPa3 was less cyanogenic and less plant growth inhibiting than the clinical strainP. aeruginosaPAO1. Quorum-sensing deficient mutants ofC. violaceumCV0,P. aeruginosaPAO1, andP. aeruginosaPUPa3 showed not only diminished HCN production but also strongly reduced volatile-mediated phytotoxicity. The double treatment of providing plants with reactive oxygen species scavenging compounds and overexpressing the alternative oxidase AOX1a led to a significant reduction of volatile-mediated toxicity. This indicates that oxidative stress is a key process in the physiological changes leading to plant death upon exposure to toxic bacterial volatiles.

APA, Harvard, Vancouver, ISO, and other styles

8

Popova, Alexandra A., Olga A. Koksharova, Valentina A. Lipasova, Julia V. Zaitseva, Olga A. Katkova-Zhukotskaya, Svetlana Iu Eremina, Alexander S. Mironov, Leonid S. Chernin, and Inessa A. Khmel. "Inhibitory and Toxic Effects of Volatiles Emitted by Strains ofPseudomonasandSerratiaon Growth and Survival of Selected Microorganisms,Caenorhabditis elegans, andDrosophila melanogaster." BioMed Research International 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/125704.

Full text

Abstract:

In previous research, volatile organic compounds (VOCs) emitted by various bacteria into the chemosphere were suggested to play a significant role in the antagonistic interactions between microorganisms occupying the same ecological niche and between bacteria and target eukaryotes. Moreover, a number of volatiles released by bacteria were reported to suppress quorum-sensing cell-to-cell communication in bacteria, and to stimulate plant growth. Here, volatiles produced byPseudomonasandSerratiastrains isolated mainly from the soil or rhizosphere exhibited bacteriostatic action on phytopathogenicAgrobacterium tumefaciensand fungi and demonstrated a killing effect on cyanobacteria, flies (Drosophila melanogaster), and nematodes (Caenorhabditis elegans). VOCs emitted by the rhizosphericPseudomonas chlororaphisstrain 449 and bySerratia proteamaculansstrain 94 isolated from spoiled meat were identified using gas chromatography-mass spectrometry analysis, and the effects of the main headspace compounds—ketones (2-nonanone, 2-heptanone, 2-undecanone) and dimethyl disulfide—were inhibitory toward the tested microorganisms, nematodes, and flies. The data confirmed the role of bacterial volatiles as important compounds involved in interactions between organisms under natural ecological conditions.

APA, Harvard, Vancouver, ISO, and other styles

9

Riu, Myoungjoo, Jin-Soo Son, Sang-Keun Oh, and Choong-Min Ryu. "Aromatic Agriculture: Volatile Compound-Based Plant Disease Diagnosis and Crop Protection." Research in Plant Disease 28, no. 1 (March 31, 2022): 1–18. http://dx.doi.org/10.5423/rpd.2022.28.1.1.

Full text

Abstract:

Volatiles exist ubiquitously in nature. Volatile compounds produced by plants and microorganisms confer inter-kingdom and intra-kingdom communications. Autoinducer signaling molecules from contact-based chemical communication, such as bacterial quorum sensing, are relayed through short distances. By contrast, biogenic volatiles derived from plant-microbe interactions generate long-distance (>20 cm) alarm signals for sensing harmful microorganisms. In this review, we discuss prior work on volatile compound-mediated diagnosis of plant diseases, and the use of volatile packaging and dispensing approaches for the biological control of fungi, bacteria, and viruses. In this regard, recent developments on technologies to analyze and detect microbial volatile compounds are introduced. Furthermore, we survey the chemical encapsulation, slow-release, and bio-nano techniques for volatile formulation and delivery that are expected to overcome limitations in the application of biogenic volatiles to modern agriculture. Collectively, technological advances in volatile compound detection, packaging, and delivery provide great potential for the implementation of ecologically-sound plant disease management strategies. We hope that this review will help farmers and young scientists understand the nature of microbial volatile compounds, and shift paradigms on disease diagnosis and management to aromatic (volatile-based) agriculture.

APA, Harvard, Vancouver, ISO, and other styles

10

Perez, Rufino, John Linz, Matt Rasick, and Randolph M. Beaudry. "Volatile Profiles of Microorganisms on Various Substrates, Including Fruits and Vegetables." HortScience 32, no. 3 (June 1997): 489B—489. http://dx.doi.org/10.21273/hortsci.32.3.489b.

Full text

Abstract:

Minimally processed fruits and vegetables, by virtue of cell disruption resulting from processing and handling, can encourage the growth of microorganisms. There is potential for identification of microorganisms and characterization of microbial products and constituents in food, based on volatile profile analysis. We have prepared a flow-through system to grow several bacteria including E. coli 25922-ATCC and E. coli 0157:H7 and monitored the volatile profiles under conditions similar to those experienced by minimally processed fruits and vegetables during marketing conditions. Specific volatiles have been identified that may have potential to serve as signature-type volatiles in accurate automated quality control systems. For example, indole and a number of short-chain fatty acids are produced in copious amount by E. coli 25922-ATCC, but are not constituent of broccoli or carrot aroma profiles. The data suggest that specific volatiles may serve as “markers” for bacterial presence.

APA, Harvard, Vancouver, ISO, and other styles

11

Nawrath, Thorben, Georgies F. Mgode, Bart Weetjens, Stefan H. E. Kaufmann, and Stefan Schulz. "The volatiles of pathogenic and nonpathogenic mycobacteria and related bacteria." Beilstein Journal of Organic Chemistry 8 (February 22, 2012): 290–99. http://dx.doi.org/10.3762/bjoc.8.31.

Full text

Abstract:

Volatiles released by pathogenic and nonpathogenic mycobacteria, as well as by mycobacteria-relatedNocardiaspp., were analyzed. Bacteria were cultivated on solid and in liquid media, and headspace samples were collected at various times during the bacterial lifecycle to elucidate the conditions giving optimal volatile emission. Emitted volatiles were collected by using closed-loop stripping analysis (CLSA) and were analyzed by gas-chromatography–mass-spectrometry. A wide range of compounds was produced, although the absolute amount was small. Nevertheless, characteristic bouquets of compounds could be identified. Predominantly aromatic compounds and fatty-acid derivatives were released by pathogenic/nonpathogenic mycobacteria, while the twoNocardiaspp. (N. asteroidesandN. africana) emitted the sesquiterpene aciphyllene. PathogenicMycobacterium tuberculosisstrains grown on agar plates produced a distinct bouquet with different volatiles, while liquid cultures produce less compounds but sometimes an earlier onset of volatile production because of their steeper growth curves under this conditions. This behavior differentiatesM. tuberculosisfrom other mycobacteria, which generally produced fewer compounds in seemingly lower amounts. Knowledge of the production of volatiles byM. tuberculosiscan facilitate the rational design of alternative and faster diagnostic measures for tuberculosis.

APA, Harvard, Vancouver, ISO, and other styles

12

Mülner, Pascal, Alessandro Bergna, Philipp Wagner, Dženana Sarajlić, Barbara Gstöttenmayr, Kristin Dietel, Rita Grosch, Tomislav Cernava, and Gabriele Berg. "Microbiota Associated with Sclerotia of Soilborne Fungal Pathogens – A Novel Source of Biocontrol Agents Producing Bioactive Volatiles." Phytobiomes Journal 3, no. 2 (January 2019): 125–36. http://dx.doi.org/10.1094/pbiomes-11-18-0051-r.

Full text

Abstract:

Soilborne plant pathogens are an increasing problem in modern agriculture, and their ability to survive long periods in soil as persistent sclerotia makes control and treatment particularly challenging. To develop new control strategies, we explored bacteria associated with sclerotia of Sclerotinia sclerotiorum and Rhizoctonia solani, two soilborne fungi causing high yield losses. We combined different methodological approaches to get insights into the indigenous microbiota of sclerotia, to compare it to bacterial communities of the surrounding environment, and to identify novel biocontrol agents and antifungal volatiles. Analysis of 16S rRNA gene fragment amplicons revealed significant compositional differences in the bacterial microbiomes of Rhizoctonia sclerotia, the unaffected tuber surface and surrounding soil. Moreover, distinctive bacterial lineages were associated with specific sample types. Flavobacteriaceae and Caulobacteraceae were primarily found in unaffected areas, while Phyllobacteriaceae and Bradyrhizobiaceae were associated with sclerotia of R. solani. In parallel, we studied a strain collection isolated from sclerotia of the pathogens for emission of bioactive volatile compounds. Isolates of Bacillus, Pseudomonas, and Buttiauxella exhibited high antagonistic activity toward both soilborne pathogens and were shown to produce novel, not yet described volatiles. Differential imaging showed that volatiles emitted by the antagonists altered the melanized sclerotia surface of S. sclerotiorum. Interestingly, combinations of bacterial antagonists increased inhibition of mycelial growth up to 60% when compared with single isolates. Our study showed that fungal survival structures are associated with a specific microbiome, which is also a reservoir for new biocontrol agents.

APA, Harvard, Vancouver, ISO, and other styles

13

Lammers, Alexander, Michael Lalk, and Paolina Garbeva. "Air Ambulance: Antimicrobial Power of Bacterial Volatiles." Antibiotics 11, no. 1 (January 14, 2022): 109. http://dx.doi.org/10.3390/antibiotics11010109.

Full text

Abstract:

We are currently facing an antimicrobial resistance crisis, which means that a lot of bacterial pathogens have developed resistance to common antibiotics. Hence, novel and innovative solutions are urgently needed to combat resistant human pathogens. A new source of antimicrobial compounds could be bacterial volatiles. Volatiles are ubiquitous produced, chemically divers and playing essential roles in intra- and interspecies interactions like communication and antimicrobial defense. In the last years, an increasing number of studies showed bioactivities of bacterial volatiles, including antibacterial, antifungal and anti-oomycete activities, indicating bacterial volatiles as an exciting source for novel antimicrobial compounds. In this review we introduce the chemical diversity of bacterial volatiles, their antimicrobial activities and methods for testing this activity. Concluding, we discuss the possibility of using antimicrobial volatiles to antagonize the antimicrobial resistance crisis.

APA, Harvard, Vancouver, ISO, and other styles

14

Norton, J. M., and G. E. Harman. "Responses of soil microorganisms to volatile exudates from germinating pea seeds." Canadian Journal of Botany 63, no. 6 (June 1, 1985): 1040–45. http://dx.doi.org/10.1139/b85-142.

Full text

Abstract:

Responses of soil microorganisms to volatile exudates from germinating pea seeds of differing quality were determined. Germination of sclerotia of Rhizoctonia solani and Sclerotium rolfsii and subsequent hyphal growth were stimulated by exposure to volatiles from aged but not nonaged pea seeds. Hyphae grew preferentially toward aged seeds. In natural soil, bacterial and fungal populations showed significant increases after exposure to volatiles from aged seed. For example, Fusarium spp. and Pseudomonas spp. showed increases of 79 and 2200%, respectively, over their original population levels after a 48-h exposure to volatiles. Conversely, Pythium populations and associated seed-rotting potential of soil decreased in natural soils exposed to volatiles. In autoclaved soils infested with P. ultimum (PHP4), Pythium populations increased dramatically after exposure to volatiles from aged pea seeds. In soils infested with either soil fungi or bacteria in addition to P. ultimum, Pythium levels remained constant or decreased, respectively, with time of exposure. Exposure to the volatiles from aged pea seeds stimulated soil microbial activity. These results suggest that Pythium germlings, when unable to reach a host, are subjected to microbial antagonism in the presence of the native soil microflora. A decrease in cucumber seed rot coincided with decreases in Pythium numbers.

APA, Harvard, Vancouver, ISO, and other styles

15

Sá, Carina, Diana Matos, Paulo Cardoso, and Etelvina Figueira. "Do Volatiles Affect Bacteria and Plants in the Same Way? Growth and Biochemical Response of Non-Stressed and Cd-Stressed Arabidopsis thaliana and Rhizobium E20-8." Antioxidants 11, no. 11 (November 21, 2022): 2303. http://dx.doi.org/10.3390/antiox11112303.

Full text

Abstract:

Plant roots are colonized by rhizobacteria, and these soil microorganisms can not only stimulate plant growth but also increase tolerance to stress through the production of volatile organic compounds. However, little is known about the effect that these plant beneficial volatiles may have on bacteria. In this study, the effects on growth and oxidative status of different concentrations of three volatiles already reported to have a positive influence on plant growth (2-butanone, 3-methyl-1-butanol, and 2,3-butanediol) were determined in A. thaliana and Rhizobium sp. strain E20-8 via airborne exposure in the presence and absence of Cd. It was expected to ascertain if the plant and the bacterium are influenced in the same way by the volatiles, and if exposure to stress (Cd) shifts the effects of volatiles on plants and bacteria. Results showed the antioxidant activity of the volatiles protecting the plant cell metabolism from Cd toxicity and increasing plant tolerance to Cd. Effects on bacteria were less positive. The two alcohols (3-methyl-1-butanol and 2,3-butanediol) increased Cd toxicity, and the ketone (2-butanone) was able to protect Rhizobium from Cd stress, constituting an alternative way to protect soil bacterial communities from stress. The application of 2-butanone thus emerges as an alternative way to increase crop production and crop resilience to stress in a more sustainable way, either directly or through the enhancement of PGPR activity.

APA, Harvard, Vancouver, ISO, and other styles

16

Wootton, Lucie. "Bacterial volatiles give the game away." Nature Reviews Microbiology 9, no. 9 (July 25, 2011): 632. http://dx.doi.org/10.1038/nrmicro2635.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Ryu, C. M., M. A. Farag, C. H. Hu, M. S. Reddy, H. X. Wei, P. W. Pare, and J. W. Kloepper. "Bacterial volatiles promote growth in Arabidopsis." Proceedings of the National Academy of Sciences 100, no. 8 (April 8, 2003): 4927–32. http://dx.doi.org/10.1073/pnas.0730845100.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Kai, Marco, Maria Haustein, Francia Molina, Anja Petri, Birte Scholz, and Birgit Piechulla. "Bacterial volatiles and their action potential." Applied Microbiology and Biotechnology 81, no. 6 (January 2009): 1001–12. http://dx.doi.org/10.1007/s00253-008-1760-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Yu, Jie, Guicai Du, Ronggui Li, Li Li, Zi Li, Changjing Zhou, Congcong Chen, and Daosen Guo. "Nematicidal activities of bacterial volatiles and components from two marine bacteria, Pseudoalteromonas marina strain H-42 and Vibrio atlanticus strain S-16, against the pine wood nematode, Bursaphelenchus xylophilus." Nematology 17, no. 9 (2015): 1011–25. http://dx.doi.org/10.1163/15685411-00002920.

Full text

Abstract:

Bacterial volatiles represent an important source for new natural nematicidal compounds that may be developed as novel nematicidal agents to control plant-parasitic nematodes. In this study, two marine bacteria,Pseudoalteromonas marinastrain H-42 andVibrio atlanticusstrain S-16, were isolated from seawater and the bay scallop (Argopecten irradians), respectively, collected from the subtidal beds at Qingdao, China.In vitrobioassays indicated that culture supernatants of the two bacteria displayed strong nematicidal activities with corrected mortalities of more than 93% after 24 h exposure against the pine wood nematode (PWN),Bursaphelenchus xylophilus. Maximal nematicidal activity was exhibited by culture supernatants of the two marine bacteria incubated at 15-20°C for 3 days in Zobell 2216E medium prepared with 100% seawater and initial pH 6.0-7.0, inoculating 19-h-old cultures. Through analysis using solid-phase microextraction-gas chromatography/mass spectrometry, the volatiles produced by the two bacteria were shown to contain mainly dimethyl disulphide, benzaldehyde, dimethyl trisulphide,tert-butylamine, acetone and dimethylamine, N-(diisopropylphosphino)methyl-. Results from nematicidal assay using pure commercial compounds instead of the candidate volatiles demonstrated that the four volatile compounds, dimethyl trisulphide (LC90 = 0.060 mmol l−1), benzaldehyde (LC90 = 0.309 mmol l−1), dimethyl disulphide (LC90 = 0.162 mmol l−1) andtert-butylamine (LC90 = 0.366 mmol l−1), showed strong nematicidal activities against PWN. This is the first report on the nematicidal activity of volatile organic compounds (VOC) from marine microorganisms. This study indicates that the nematicidal VOC produced by marine bacteria are potential substitutes for current chemical control options of pine wilt disease caused by PWN which greatly threatens global forest resources.

APA, Harvard, Vancouver, ISO, and other styles

20

Adams, A. S., C. R. Currie, Y. Cardoza, K. D. Klepzig, and K. F. Raffa. "Effects of symbiotic bacteria and tree chemistry on the growth and reproduction of bark beetle fungal symbionts." Canadian Journal of Forest Research 39, no. 6 (June 2009): 1133–47. http://dx.doi.org/10.1139/x09-034.

Full text

Abstract:

Bark beetles are associated with diverse assemblages of microorganisms, many of which affect their interactions with host plants and natural enemies. We tested how bacterial associates of three bark beetles with various types of host relationships affect growth and reproduction of their symbiotic fungi. Fungi were exposed to volatiles from bacteria in an arena that imposed physical separation but shared airspace. We also exposed fungi to vapors of the host compound, α-pinene, and to combinations of bacterial volatiles and α-pinene. Bacterial volatiles commonly stimulated growth of Leptographium procerum (W.B. Kendr.) M.J. Wingf. and Grosmannia clavigera (Rob.-Jeffr. & R.W. Davidson) Zipfel, Z.W. de Beer & Wingf., which are symbiotic fungi of Dendroctonus valens LeConte and Dendroctonus ponderosae Hopkins, respectively. They less commonly stimulated growth of Ophiostoma ips (Rumbold) Nannf., which is associated with Ips grandicollis Eichhoff. Some bacteria inhibited L. procerum, Ophiostoma montium (Rumbold) von Arx (another associate of D. ponderosae), and O. ips. Bacteria greatly stimulated spore production of symbionts of D. valens and D. ponderosae. α-Pinene strongly affected some of these relationships, causing amplification, reduction, or reversal of the interactions among the bacteria and fungi. Our results show that some bacteria associated with bark beetles directly affect fungal symbionts and interact with tree chemistry to affect fungal growth and sporulation. The strongest effects were induced by bacteria associated with beetles adapted to attacking living trees with vigorous defenses, and on fungal reproductive structures.

APA, Harvard, Vancouver, ISO, and other styles

21

Weise, Teresa, Marco Kai, Anja Gummesson, Armin Troeger, Stephan von Reuß, Silvia Piepenborn, Francine Kosterka, et al. "Volatile organic compounds produced by the phytopathogenic bacteriumXanthomonas campestrispv.vesicatoria85-10." Beilstein Journal of Organic Chemistry 8 (April 17, 2012): 579–96. http://dx.doi.org/10.3762/bjoc.8.65.

Full text

Abstract:

Xanthomonas campestrisis a phytopathogenic bacterium and causes many diseases of agricultural relevance. Volatiles were shown to be important in inter- and intraorganismic attraction and defense reactions. Recently it became apparent that also bacteria emit a plethora of volatiles, which influence other organisms such as invertebrates, plants and fungi. As a first step to study volatile-based bacterial–plant interactions, the emission profile ofXanthomonas c.pv.vesicatoria85-10 was determined by using GC/MS and PTR–MS techniques. More than 50 compounds were emitted by this species, the majority comprising ketones and methylketones. The structure of the dominant compound, 10-methylundecan-2-one, was assigned on the basis of its analytical data, obtained by GC/MS and verified by comparison of these data with those of a synthetic reference sample. Application of commercially available decan-2-one, undecan-2-one, dodecan-2-one, and the newly synthesized 10-methylundecan-2-one in bi-partite Petri dish bioassays revealed growth promotions in low quantities (0.01 to 10 μmol), whereas decan-2-one at 100 μmol caused growth inhibitions of the fungusRhizoctonia solani. Volatile emission profiles of the bacteria were different for growth on media (nutrient broth) with or without glucose.

APA, Harvard, Vancouver, ISO, and other styles

22

Mülner, Pascal, Elisa Schwarz, Kristin Dietel, Stefanie Herfort, Jennifer Jähne, Peter Lasch, Tomislav Cernava, Gabriele Berg, and Joachim Vater. "Fusaricidins, Polymyxins and Volatiles Produced by Paenibacillus polymyxa Strains DSM 32871 and M1." Pathogens 10, no. 11 (November 15, 2021): 1485. http://dx.doi.org/10.3390/pathogens10111485.

Full text

Abstract:

Paenibacilli are efficient producers of potent agents against bacterial and fungal pathogens, which are of great interest both for therapeutic applications in medicine as well as in agrobiotechnology. Lipopeptides produced by such organisms play a major role in their potential to inactivate pathogens. In this work we investigated two lipopeptide complexes, the fusaricidins and the polymyxins, produced by Paenibacillus polymyxa strains DSM 32871 and M1 by MALDI-TOF mass spectrometry. The fusaricidins show potent antifungal activities and are distinguished by an unusual variability. For strain DSM 32871 we identified numerous yet unknown variants mass spectrometrically. DSM 32871 produces polymyxins of type E (colistins), while M1 forms polymyxins P. For both strains, novel but not yet completely characterized polymyxin species were detected, which possibly are glycosylated. These compounds may be of interest therapeutically, because polymyxins have gained increasing attention as last-resort antibiotics against multiresistant pathogenic Gram-negative bacteria. In addition, the volatilomes of DSM 32781 and M1 were investigated with a GC–MS approach using different cultivation media. Production of volatile organic compounds (VOCs) was strain and medium dependent. In particular, strain M1 manifested as an efficient VOC-producer that exhibited formation of 25 volatiles in total. A characteristic feature of Paenibacilli is the formation of volatile pyrazine derivatives.

APA, Harvard, Vancouver, ISO, and other styles

23

Schulz, Stefan, and Jeroen S. Dickschat. "Bacterial volatiles: the smell of small organisms." Natural Product Reports 24, no. 4 (2007): 814. http://dx.doi.org/10.1039/b507392h.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Ryu, Choong-Min, Mohamed A. Farag, Chia-Hui Hu, Munagala S. Reddy, Joseph W. Kloepper, and Paul W. Paré. "Bacterial Volatiles Induce Systemic Resistance in Arabidopsis." Plant Physiology 134, no. 3 (February 19, 2004): 1017–26. http://dx.doi.org/10.1104/pp.103.026583.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Pinto, Gabriele Marques, Juliana Barbosa Succar, Cristiane Pimentel Victorio, and Maria Cristina de Assis. "Plant volatiles from the Brazilian restinga with bactericidal activity against multiresistant bacteria." Concilium 22, no. 7 (December 20, 2022): 598–612. http://dx.doi.org/10.53660/clm-724-769.

Full text

Abstract:

This study aimed to evaluate the bactericidal activity of Myrtaceae foliar volatile compounds against strains of Pseudomonas aeruginosa (PAO-1) and Burkholderia cenocepacia (ET-12). Although these bacteria are clinically important to human health, they, along with other bacteria (Escherichia coli, Staphylococcus aureus and Streptococcus agalactiae), also have a high profile of antimicrobial resistance associated with bovine mastitis. The chemical composition of volatiles found in Myrtaceae foliar volatiles was also characterized. To accomplish this, the essential oil was extracted from dry leaves of Eugenia astringens, Eugenia arenaria and Myrrhinum atropurpureum by hydrodistillation. Minimum inhibitory concentration (MIC) was determined by microdilution in broth. Essential oil from E. astringens leaf could inhibit growth the fives trains by the Agar diffusion method. MIC demonstrated a reduction in bacterial growth by 74% ± 2.8 (P. aeruginosa), 78.3% ±10.5 (B. cenocepacia), 87.1% ± 1.4 (E. coli), 99 % ±0.02 (S. aureus) and 99.9 ±0.01 (S. agalactiae). The terpene α-pinene was detected in all thre especies, especially M. atropurpureum and E. astringens. E. astringens showed a high contente of (E)-caryophyllene.

APA, Harvard, Vancouver, ISO, and other styles

26

Yates, David I., Bonnie H. Ownley, Nicole Labbé, Joseph J. Bozell, William E. Klingeman, Emma K. Batson, and Kimberly D. Gwinn. "Sciadopitys verticillata Resin: Volatile Components and Impact on Plant Pathogenic and Foodborne Bacteria." Molecules 24, no. 20 (October 19, 2019): 3767. http://dx.doi.org/10.3390/molecules24203767.

Full text

Abstract:

Sciadopitys verticillata (Sv) produces a white, sticky, latex-like resin with antimicrobial properties. The aims of this research were to evaluate the effects of this resin (Sv resin) on bacterial populations and to determine the impact of its primary volatile components on bioactivity. The impact of sample treatment on chemical composition of Sv resin was analyzed using Fourier transform infrared spectroscopy (FTIR) coupled with principal component analysis. The presence and concentration of volatiles in lyophilized resin were determined using gas chromatography/mass spectrometry (GC/MS). Changes in bacterial population counts due to treatment with resin or its primary volatile components were monitored. Autoclaving of the samples did not affect the FTIR spectra of Sv resin; however, lyophilization altered spectra, mainly in the CH and C=O regions. Three primary bioactive compounds that constituted >90% of volatiles (1R-α-pinene, tricyclene, and β-pinene) were identified in Sv resin. Autoclaved resin impacted bacterial growth. The resin was stimulatory for some plant and foodborne pathogens (Pseudomonas fluorescens, P. syringae, and Xanthomonas perforans) and antimicrobial for others (Escherichia coli, Bacillus cereus, Agrobacterium tumefaciens, and Erwinia amylovora). Treatment with either 1R-α-pinene or β-pinene reduced B. cereus population growth less than did autoclaved resin. The complex resin likely contains additional antimicrobial compounds that act synergistically to inhibit bacterial growth.

APA, Harvard, Vancouver, ISO, and other styles

27

Wirth, Sophia, Katrin Krause, Maritta Kunert, Selina Broska, Christian Paetz, Wilhelm Boland, and Erika Kothe. "Function of sesquiterpenes from Schizophyllum commune in interspecific interactions." PLOS ONE 16, no. 1 (January 15, 2021): e0245623. http://dx.doi.org/10.1371/journal.pone.0245623.

Full text

Abstract:

Wood is a habitat for a variety of organisms, including saprophytic fungi and bacteria, playing an important role in wood decomposition. Wood inhabiting fungi release a diversity of volatiles used as signaling compounds to attract or repel other organisms. Here, we show that volatiles of Schizophyllum commune are active against wood-decay fungi and bacteria found in its mycosphere. We identified sesquiterpenes as the biologically active compounds, that inhibit fungal growth and modify bacterial motility. The low number of cultivable wood inhabiting bacteria prompted us to analyze the microbial community in the mycosphere of S. commune using a culture-independent approach. Most bacteria belong to Actinobacteria and Proteobacteria, including Pseudomonadaceae, Sphingomonadaceae, Erwiniaceae, Yersiniaceae and Mariprofundacea as the dominating families. In the fungal community, the phyla of ascomycetes and basidiomycetes were well represented. We propose that fungal volatiles might have an important function in the wood mycosphere and could meditate interactions between microorganisms across domains and within the fungal kingdom.

APA, Harvard, Vancouver, ISO, and other styles

28

Stojanović, Gordana S., Jovana D. Ickovski, Aleksandra S. Đorđević, Goran M. Petrović, Katarina D. Stepić, Ivan R. Palić, and Jelena G. Stamenković. "The First Report on Chemical Composition and Antimicrobial Activity of Artemisia scoparia Waldst. et Kit. Extracts." Natural Product Communications 15, no. 3 (March 2020): 1934578X2091503. http://dx.doi.org/10.1177/1934578x20915034.

Full text

Abstract:

Volatiles of diethyl ether extract (DE), ethyl acetate extract (EE), and hexane extract (HE) of Artemisia scoparia Waldst. et Kit. were analyzed by gas chromatography with flame ionization detector and gas chromatography-mass spectrometry. In both DE and EE, the main compound was scoparone (24.0% and 86.1%, respectively) while in the HE, alkanes were dominant with nonacosane as the most represented (19.4%). Antimicrobial activity was tested against 4 bacterial strains and 1 fungal strain using disc-diffusion method. Tested samples were inactive against Gram-negative bacteria and they exhibited activity against Gram-positive bacteria and yeast Candida albicans. This is the first report on the chemical composition of volatile components and antimicrobial activity of DE, EE, and HE of A. scoparia Waldst. et Kit.

APA, Harvard, Vancouver, ISO, and other styles

29

Das, Piyali, Uta Effmert, Gunnar Baermann, Manuel Quella, and Birgit Piechulla. "Impact of bacterial volatiles on phytopathogenic fungi: an in vitro study on microbial competition and interaction." Journal of Experimental Botany 73, no. 2 (October 29, 2021): 596–614. http://dx.doi.org/10.1093/jxb/erab476.

Full text

Abstract:

Abstract Microorganisms in the rhizosphere are abundant and exist in very high taxonomic diversity. The major players are bacteria and fungi, and bacteria have evolved many strategies to prevail over fungi, among them harmful enzyme activities and noxious secondary metabolites. Interactions between plant growth promoting rhizobacteria and phytopathogenic fungi are potentially valuable since the plant would benefit from fungal growth repression. In this respect, the role of volatile bacterial metabolites in fungistasis has been demonstrated, but the mechanisms of action are less understood. We used three phytopathogenic fungal species (Sclerotinia sclerotiorum, Rhizoctonia solani, and Juxtiphoma eupyrena) as well as one non-phytopathogenic species (Neurospora crassa) and the plant growth promoting rhizobacterium Serratia plymuthica 4Rx13 in co-cultivation assays to investigate the influence of bacterial volatile metabolites on fungi on a cellular level. As a response to the treatment, we found elevated lipid peroxidation, which indirectly reflected the loss of fungal cell membrane integrity. An increase in superoxide dismutase, catalase, and laccase activities indicated oxidative stress. Acclimation to these adverse growth conditions completely restored fungal growth. One of the bioactive bacterial volatile compounds seemed to be ammonia, which was a component of the bacterial volatile mixture. Applied as a single compound in biogenic concentrations ammonia also caused an increase in lipid peroxidation and enzyme activities, but the extent and pattern did not fully match the effect of the entire bacterial volatile mixture.

APA, Harvard, Vancouver, ISO, and other styles

30

Mirzajani, Fateme, and Amin Hamidi. "Comparison of the Effects of Silver in Nanostructured and Ultrahigh Diluted Form on Growth and Volatile Compounds Produced by Escherichia coli and Staphylococcus aureus." Nanoscience & Nanotechnology-Asia 10, no. 3 (June 17, 2020): 316–29. http://dx.doi.org/10.2174/2210681209666190627161850.

Full text

Abstract:

Introduction: In this project, the growth and volatile metabolites profiles of Escherichia coli (E. coli ) and Staphylococcus aureus were monitored under the influence of silver base chemical, nanoparticle and ultra-highly diluted compounds. Materials & Methods: The treatments were done for 12000 life cycles using silver nanoparticles (AgNPs) as well as ultra-highly diluted Argentum nitricum (Arg-n). Volatile organic metabolites analysis was performed using gas chromatography mass spectrometry (GC-MS). The results indicated that AgNPs treatment made the bacteria resistant and adapted to growth in the nanoparticle condition. The use of ultra-highly diluted Arg-n initially increased growth but it decreased later. Also, with the continuous usage of these materials, no more bacterial growth was observed. Results: The most important compounds produced by E. coli are Acetophenone, Octyl acetate, Styrene, 1,8-cineole, 4-t-butyl-2-(1-methyl-2-nitroethyl)cyclohexane, hexadecane and 2-Undecanol. The main compounds derived from S. aureus are Acetophenone,1,8-cineole, Benzaldehyde, 2-Hexan-1-ol, Tridecanol, Dimethyl Octenal and tetradecane. Acetophenone and 1,8-cineole were common and produced by both organisms. Conclusion: Based on the origin of the produced volatiles, main volatiles percentage of untreated sample is hydrocarbon (>50%), while bacteria treatments convert the ratio in to aldehydes, ketones and alcohols in the case of AgNPs, (>80%) and aldehydes, ketones and terpenes in the case of Arg-n (>70%).

APA, Harvard, Vancouver, ISO, and other styles

31

Kanchiswamy, Chidananda Nagamangala, Mickael Malnoy, and Massimo E. Maffei. "Bioprospecting bacterial and fungal volatiles for sustainable agriculture." Trends in Plant Science 20, no. 4 (April 2015): 206–11. http://dx.doi.org/10.1016/j.tplants.2015.01.004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Chaudhury, M. F., J. J. Zhu, and S. R. Skoda. "Bacterial Volatiles Attract Gravid Secondary Screwworms (Diptera: Calliphoridae)." Journal of Economic Entomology 109, no. 2 (January 9, 2016): 947–51. http://dx.doi.org/10.1093/jee/tov390.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Bean, Heather D., Jaime Jiménez-Díaz, Jiangjiang Zhu, and Jane E. Hill. "Breathprints of model murine bacterial lung infections are linked with immune response." European Respiratory Journal 45, no. 1 (October 16, 2014): 181–90. http://dx.doi.org/10.1183/09031936.00015814.

Full text

Abstract:

In this model study, we explored the host's contribution of breath volatiles to diagnostic secondary electrospray ionisation-mass spectrometry (SESI-MS) breathprints for acute bacterial lung infections, their correlation with the host's immune response, and their use in identifying the lung pathogen.Murine airways were exposed to Pseudomonas aeruginosa and Staphylococcus aureus bacterial cell lysates or to PBS (controls), and their breath and bronchoalveolar lavage fluid (BALF) were collected at six time points (from 6 to 120 h) after exposure. Five to six mice per treatment group and four to six mice per control group were sampled at each time. Breath volatiles were analysed using SESI-MS and the BALF total leukocytes, polymorphonuclear neutrophils, lactate dehydrogenase activity, and cytokine concentrations were quantified.Lysate exposure breathprints contain host volatiles that persist for up to 120 h; are pathogen specific; are unique from breathprints of controls, active infections and cleared infections; and are correlated with the host's immune response.Bacterial lung infections induce changes to the host's breath volatiles that are selective and specific predictors of the source of infection. Harnessing the pathogen-specific volatiles in the host's breath may provide useful information for detecting latent bacterial lung infections and managing the spread of respiratory diseases.

APA, Harvard, Vancouver, ISO, and other styles

34

Costa, Lilian Simara Abreu S., Vicente Paulo Campos, Willian C. Terra, and Ludwig H. Pfenning. "Microbiota from Meloidogyne exigua egg masses and evidence for the effect of volatiles on infective juvenile survival." Nematology 17, no. 6 (2015): 715–24. http://dx.doi.org/10.1163/15685411-00002904.

Full text

Abstract:

Egg masses ofMeloidogyne exiguafrom coffee plants are subjected to a range of microbial populations and these resident soil organisms in the egg masses may affect nematode communities. The incidence of fungi and bacteria inM. exiguaegg masses was investigated and the toxic effect of their volatile organic compounds (VOCs) was tested on second-stage juveniles (J2). Bacteria and fungi were isolated from egg masses on coffee root and identified to species. The nematicidal activity of VOCs from bacterial and fungal strains was tested againstM. exiguainin vitroexperiments. Several bacterial and fungal strains were found inM. exiguaegg masses and produced VOCs that were toxic toM. exiguaJ2. Bacterial strains induced more nematode mortality compared with fungal strains. The continued colonisation of fungi and bacteria inM. exiguaegg masses occurred during the year and their VOCs reduced the viable inocula ofM. exiguaand should be explored as biocontrol agents.

APA, Harvard, Vancouver, ISO, and other styles

35

Yu, K., T. R. Hamilton-Kemp, D. D. Archbold, M. Newman, and B. E. Langlois. "386 Volatiles of E. coli O157:H7 and Foodborne Pathogen Detection on Strawberry Fruit." HortScience 34, no. 3 (June 1999): 510D—510. http://dx.doi.org/10.21273/hortsci.34.3.510d.

Full text

Abstract:

Strawberry fruit were inoculated with the human pathogen E. coli O157:H7, and the bacteria were recovered from the fruit over a 3-day period of storage at room temperature. The bacterial population was maintained on fruit when the inoculation level was relatively high and increased when the inoculation level was low. The volatile metabolites of E. coli O157:H7 growing on plate count agar (PCA) and on inoculated strawberry fruit were collected by a headspace trapping system and analyzed by gas chromatography and GC-mass spectrometry. E. coli O157:H7 grown on PCA produced a variety of volatile compounds including indole as a major component and a series of methyl ketones. A nonpathogenic E. coli also produced these compounds. However, there was not an appreciable amount of indole collected from E. coli O157:H7 inoculated strawberry fruit as compared to the large amount of volatiles produced by the fruit. Strawberry fruit were able to capture over 95% of the vapor phase indole fed to them from a neat source.

APA, Harvard, Vancouver, ISO, and other styles

36

Vespermann, Anja, Marco Kai, and Birgit Piechulla. "Rhizobacterial Volatiles Affect the Growth of Fungi and Arabidopsis thaliana." Applied and Environmental Microbiology 73, no. 17 (June 29, 2007): 5639–41. http://dx.doi.org/10.1128/aem.01078-07.

Full text

Abstract:

ABSTRACT Volatiles of Stenotrophomonas, Serratia, and Bacillus species inhibited mycelial growth of many fungi and Arabidopsis thaliana (40 to 98%), and volatiles of Pseudomonas species and Burkholderia cepacia retarded the growth to lesser extents. Aspergillus niger and Fusarium species were resistant, and B. cepacia and Staphylococcus epidermidis promoted the growth of Rhizoctonia solani and A. thaliana. Bacterial volatiles provide a new source of compounds with antibiotic and growth-promoting features.

APA, Harvard, Vancouver, ISO, and other styles

37

Bailly, Aurélien, and Laure Weisskopf. "The modulating effect of bacterial volatiles on plant growth." Plant Signaling & Behavior 7, no. 1 (January 2012): 79–85. http://dx.doi.org/10.4161/psb.7.1.18418.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Ahmad, A., A. M. Viljoen, and H. Y. Chenia. "The impact of plant volatiles on bacterial quorum sensing." Letters in Applied Microbiology 60, no. 1 (November 25, 2014): 8–19. http://dx.doi.org/10.1111/lam.12343.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Kwon, Young Sang, Choong-Min Ryu, Soohyun Lee, Hyo Bee Park, Ki Soo Han, Jung Han Lee, Kyunghee Lee, et al. "Proteome analysis of Arabidopsis seedlings exposed to bacterial volatiles." Planta 232, no. 6 (September 4, 2010): 1355–70. http://dx.doi.org/10.1007/s00425-010-1259-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

O'HALLORAN, D. M., and A. M. BURNELL. "An investigation of chemotaxis in the insect parasitic nematode Heterorhabditis bacteriophora." Parasitology 127, no. 4 (October 2003): 375–85. http://dx.doi.org/10.1017/s0031182003003688.

Full text

Abstract:

We tested the chemotactic responses of dauer juvenile stages (DJs) of the insect parasitic nematode Heterorhabditis bacteriophora to a variety of compounds that are known to be highly attractive or highly repellent to Caenorhabditis elegans. While H. bacteriophora DJs respond to alcohols and some aromatic compounds as well as to host metabolites such as uric acid and CO2, the most notable difference in the responses of these two nematodes is that H. bacteriophora DJs are unresponsive to a large number of compounds which C. elegans finds highly attractive. The latter compounds are typical by-products of bacterial metabolism and include aldehydes, esters, ketones and short-chain alcohols. While C. elegans finds long-chain alcohols (e.g. 1-heptanol and 1-octanol) repellent and short-chain alcohols highly attractive, H. bacteriophora DJs are strongly attracted to 1-heptanol, 1-octanol and 1-nonanol and find short-chain alcohols to be only slightly attractive. Parasitic-stage H. bacteriophora nematodes show a very weak chemotactic response to volatile molecules that DJs find highly attractive. Our results suggest that, associated with the adoption of a parasitic mode of life by Heterorhabditis, there was an adaptive change in chemotactic behaviour of the infective stages, resulting in a decreased sensitivity to volatile by-products of bacterial metabolism and an increased sensitivity towards long-chain alcohols and other insect-specific volatiles and possibly also to herbivore-induced plant volatiles.

APA, Harvard, Vancouver, ISO, and other styles

41

LLOYD, STEVEN W., CASEY C. GRIMM, MAREN A. KLICH, and SHANNON B. BELTZ. "Fungal Infections of Fresh-Cut Fruit Can Be Detected by the Gas Chromatography–Mass Spectrometric Identification of Microbial Volatile Organic Compounds." Journal of Food Protection 68, no. 6 (June 1, 2005): 1211–16. http://dx.doi.org/10.4315/0362-028x-68.6.1211.

Full text

Abstract:

There is a large and rapidly growing market for fresh-cut fruit. Microbial volatile organic compounds indicate the presence of fungal or bacterial contamination in fruit. In order to determine whether microbial volatile organic compounds can be used to detect contamination before fruit becomes unmarketable, pieces of cantaloupe, apple, pineapple, and orange were inoculated with a variety of fungal species, incubated at 25°C, then sealed in glass vials. The volatiles were extracted by headspace solid-phase microextraction and analyzed by gas chromatography–mass spectrometry. Forty-five compounds were identified that might serve as unique identifiers of fungal contamination. Fungal contamination can be detected as early as 24 h after inoculation.

APA, Harvard, Vancouver, ISO, and other styles

42

Monedeiro, Fernanda, Viorica Railean-Plugaru, Maciej Monedeiro-Milanowski, Paweł Pomastowski, and Bogusław Buszewski. "Metabolic Profiling of VOCs Emitted by Bacteria Isolated from Pressure Ulcers and Treated with Different Concentrations of Bio-AgNPs." International Journal of Molecular Sciences 22, no. 9 (April 29, 2021): 4696. http://dx.doi.org/10.3390/ijms22094696.

Full text

Abstract:

Considering the advent of antibiotic resistance, the study of bacterial metabolic behavior stimulated by novel antimicrobial agents becomes a relevant tool to elucidate involved adaptive pathways. Profiling of volatile metabolites was performed to monitor alterations of bacterial metabolism induced by biosynthesized silver nanoparticles (bio-AgNPs). Escherichia coli, Enterococcus faecalis, Klebsiella pneumoniae and Proteus mirabilis were isolated from pressure ulcers, and their cultures were prepared in the presence/absence of bio-AgNPs at 12.5, 25 and 50 µg mL−1. Headspace solid phase microextraction associated to gas chromatography–mass spectrometry was the employed analytical platform. At the lower concentration level, the agent promoted positive modulation of products of fermentation routes and bioactive volatiles, indicating an attempt of bacteria to adapt to an ongoing suppression of cellular respiration. Augmented response of aldehydes and other possible products of lipid oxidative cleavage was noticed for increasing levels of bio-AgNPs. The greatest concentration of agent caused a reduction of 44 to 80% in the variety of compounds found in the control samples. Pathway analysis indicated overall inhibition of amino acids and fatty acids routes. The present assessment may provide a deeper understanding of molecular mechanisms of bio-AgNPs and how the metabolic response of bacteria is untangled.

APA, Harvard, Vancouver, ISO, and other styles

43

Kai, Marco, Anja Vespermann, and Birgit Piechulla. "The growth of fungi andArabidopsis thalianais influenced by bacterial volatiles." Plant Signaling & Behavior 3, no. 7 (July 2008): 482–84. http://dx.doi.org/10.4161/psb.3.7.5681.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Veraart, A. J., P. Garbeva, F. van Beersum, A. Ho, C. A. Hordijk, M. Meima-Franke, A. J. Zweers, and P. L. E. Bodelier. "Living apart together—bacterial volatiles influence methanotrophic growth and activity." ISME Journal 12, no. 4 (January 30, 2018): 1163–66. http://dx.doi.org/10.1038/s41396-018-0055-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

PING, L. "Signals from the underground: bacterial volatiles promote growth in Arabidopsis." Trends in Plant Science 9, no. 6 (June 2004): 263–66. http://dx.doi.org/10.1016/j.tplants.2004.04.008.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Garbeva, Paolina, and Laure Weisskopf. "Airborne medicine: bacterial volatiles and their influence on plant health." New Phytologist 226, no. 1 (November 27, 2019): 32–43. http://dx.doi.org/10.1111/nph.16282.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Orban, Axel, Jeanny Jaline Jerschow, Florian Birk, Christian Suarez, Sylvia Schnell, and Martin Rühl. "Effect of bacterial volatiles on the mycelial growth of mushrooms." Microbiological Research 266 (January 2023): 127250. http://dx.doi.org/10.1016/j.micres.2022.127250.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Farag, Mohamed A., Huiming Zhang, and Choong-Min Ryu. "Dynamic Chemical Communication between Plants and Bacteria through Airborne Signals: Induced Resistance by Bacterial Volatiles." Journal of Chemical Ecology 39, no. 7 (July 2013): 1007–18. http://dx.doi.org/10.1007/s10886-013-0317-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Vitanović, Elda, Jeffrey R. Aldrich, Kyria Boundy-Mills, Marin Čagalj, Susan E. Ebeler, Hannah Burrack, and Frank G. Zalom. "Olive Fruit Fly, Bactrocera oleae (Diptera: Tephritidae), Attraction to Volatile Compounds Produced by Host and Insect-Associated Yeast Strains." Journal of Economic Entomology 113, no. 2 (December 27, 2019): 752–59. http://dx.doi.org/10.1093/jee/toz341.

Full text

Abstract:

Abstract The olive fruit fly, Bactrocera oleae (Rossi), is one of the most damaging insect pests of olives worldwide, requiring the use of insecticides for fruit protection in many orchards. Olive fruit flies are attracted to volatile composunds, including a female-produced pheromone, and host-plant and bacterial volatiles. Preliminary laboratory bioassays were conducted for olive fruit fly attraction to over 130 yeast strains from among 400 that were isolated from B. oleae adults and larvae or other insects, infested olives, and potential feeding sites. Kuraishia capsulata, Scheffersomyces ergatensis, Peterozyma xylosa, Wickerhamomyces subpelliculosus, and Lachancea thermotolerans appeared to attract B. oleae as well or better than did torula yeast pellets (Cyberlindnera jadinii; syn. Candida utilis). Volatile compounds emitted by these yeast strains were chemically identified, and included isobutanol, isoamyl alcohol, 2-phenethyl alcohol, isobutyl acetate, and 2-phenethyl acetate. The behavioral response of B. oleae adults to these volatile compounds at three concentrations was tested in a laboratory Y-tube olfactometer. The same volatile compounds were also tested in the field. Isoamyl alcohol was more attractive than the other compounds tested in both laboratory and field bioassays. Isobutanol was not attractive to B. oleae in either laboratory bioassay or field bioassay. Identifying yeast volatiles attractive to the olive fruit fly may lead to development of a more effective lure for detection, monitoring, and possibly control of B. oleae.

APA, Harvard, Vancouver, ISO, and other styles

50

Mazorra-Alonso, Mónica, Manuel Martín-Vivaldi, Juan Manuel Peralta-Sánchez, and Juan José Soler. "Autoclaving Nest-Material Remains Influences the Probability of Ectoparasitism of Nestling Hoopoes (Upupa epops)." Biology 9, no. 10 (September 23, 2020): 306. http://dx.doi.org/10.3390/biology9100306.

Full text

Abstract:

Nest bacterial environment influences avian reproduction directly because it might include pathogenic- or antibiotic-producing bacteria or indirectly because predators or ectoparasites can use volatile compounds from nest bacterial metabolism to detect nests of their avian hosts. Hoopoes (Upupa epops) do not build nests. They rather reuse holes or nest-boxes that contain remains of nest-materials from previous breeding seasons. Interestingly, it has been recently described that the nest’s bacterial environment partly affects the uropygial gland microbiota of hoopoe females and eggshells. Blood-sucking ectoparasites use chemical cues to find host nests, so we experimentally tested the hypothetical effects of microorganisms inhabiting nest-material remains before reproduction regarding the intensity of ectoparasitism suffered by 8-day-old nestling hoopoes. In accordance with the hypothesis, nestlings hatched in nest-boxes with autoclaved nest-material remains from the previous reproductive seasons suffered less from ectoparasites than those hatched in the control nest-boxes with nonautoclaved nest-material. Moreover, we found a positive association between the bacterial density of nest-material during the nestling phase and ectoparasitism intensity that was only apparent in nest-boxes with autoclaved nest-material. However, contrary to our expectations, nest bacterial load was positively associated with fledgling success. These results suggest a link between the community of microorganisms of nest-material remains and the intensity of ectoparasitism, and, on the other hand, that the nest bacterial environment during reproduction is related to fledging success. Here, we discuss possible mechanisms explaining the experimental and correlative results, including the possibility that the experimental autoclaving of nest material affected the microbiota of females and nestlings’ secretion and/or nest volatiles that attracted ectoparasites, therefore indirectly affecting both the nest bacterial environment at the nestling stage and fledging success.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Bacterial volatiles'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles