Dimethyl disulfide is an induced systemic resistance elicitor produced by Bacillus cereus C1L

BACKGROUND: Bacillus cereus C1L is a plant growth‐promoting rhizobacterium and can elicit induced systemic resistance (ISR) in plants against necrotrophic pathogens. However, little is known about ISR elicitors produced by B. cereus C1L, and no ISR elicitor has been identified and characterised. The...

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Published in:Pest management science 2012-09, Vol.68 (9), p.1306-1310
Main Authors: Huang, Chien‐Jui, Tsay, Jia‐Fang, Chang, Shu‐Yu, Yang, Hsiu‐Ping, Wu, Wen‐Shi, Chen, Chao‐Ying
Format: Article
Language:English
Subjects:
Bacillus cereus
Bacillus cereus - chemistry
Bacillus cereus - immunology
Bacillus cereus - physiology
Biological and medical sciences
Botrytis - drug effects
Botrytis - growth & development
Botrytis cinerea
Chemical compounds
Cochliobolus heterostrophus
dimethyl disulfide
Disease Resistance
Disulfides - analysis
Disulfides - immunology
Disulfides - pharmacology
foliar diseases
Fundamental and applied biological sciences. Psychology
fungal diseases of plants
gas chromatography
Gram-positive bacteria
greenhouses
Immunity, Innate
induced resistance
mass spectrometry
Metabolites
microextraction
Nicotiana - immunology
Nicotiana - microbiology
Pathogens
Plant diseases
Plant Diseases - immunology
Plant Diseases - microbiology
Plant resistance
Rhizobium
soil drenching
soil fumigation
tobacco
Volatile Organic Compounds - analysis
Volatile Organic Compounds - immunology
Volatile Organic Compounds - pharmacology
volatiles
Zea mays
Zea mays - immunology
Zea mays - microbiology
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Summary:BACKGROUND: Bacillus cereus C1L is a plant growth‐promoting rhizobacterium and can elicit induced systemic resistance (ISR) in plants against necrotrophic pathogens. However, little is known about ISR elicitors produced by B. cereus C1L, and no ISR elicitor has been identified and characterised. Therefore, the objective of this study is to identify volatile ISR elicitor(s) produced by B. cereus C1L. RESULTS: The volatile metabolites produced by B. cereus C1L were extracted, separated and identified by solid‐phase microextraction, gas chromatography and mass spectrometry. Dimethyl disulfide (DMDS) was the only separated metabolite being determined. Afterwards, application of DMDS by means of soil drench significantly protected tobacco and corn plants against Botrytis cinerea and Cochliobolus heterostrophus, respectively, under greenhouse conditions. The results reveal that DMDS could play an important role in ISR by B. cereus C1L. CONCLUSION: This is the first report of DMDS as an elicitor produced by an ISR‐eliciting B. cereus strain and its ability to suppress plant fungal diseases under greenhouse conditions. It is suggested that DMDS has potential for practical use in controlling plant foliar diseases besides soil fumigation.
ISSN:1526-498X
1526-4998
DOI:10.1002/ps.3301