Activation of the jasmonic acid plant defence pathway alters the composition of rhizosphere bacterial communities

Jasmonic acid (JA) signalling plays a central role in plant defences against necrotrophic pathogens and herbivorous insects, which afflict both roots and shoots. This pathway is also activated following the interaction with beneficial microbes that may lead to induced systemic resistance. Activation...

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Bibliographic Details
Published in:PloS one 2013-02, Vol.8 (2), p.e56457
Main Authors: Carvalhais, Lilia C, Dennis, Paul G, Badri, Dayakar V, Tyson, Gene W, Vivanco, Jorge M, Schenk, Peer M
Format: Article
Language:English
Subjects:
Acetates - pharmacology
Acids
Activation
Arabidopsis - cytology
Arabidopsis - drug effects
Arabidopsis - immunology
Arabidopsis - microbiology
Arabidopsis thaliana
Bacteria
Biodiversity
Biology
Community composition
Community structure
Cyclopentanes - metabolism
Cyclopentanes - pharmacology
Defense industry
Deoxyribonucleic acid
DNA
Ethanol
Gene expression
Horticulture
Hostages
Hypotheses
Insects
Jasmonic acid
Laboratories
Landscape architecture
Methyl jasmonate
Microbial activity
Microorganisms
Oxylipins - metabolism
Oxylipins - pharmacology
Pathogens
Plant growth
Plant resistance
Rhizosphere
Roots
rRNA 16S
Shoots
Signal transduction
Signal Transduction - drug effects
Signaling
Soil bacteria
Soil microbiology
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Summary:Jasmonic acid (JA) signalling plays a central role in plant defences against necrotrophic pathogens and herbivorous insects, which afflict both roots and shoots. This pathway is also activated following the interaction with beneficial microbes that may lead to induced systemic resistance. Activation of the JA signalling pathway via application of methyl jasmonate (MeJA) alters the composition of carbon containing compounds released by roots, which are implicated as key determinants of rhizosphere microbial community structure. In this study, we investigated the influence of the JA defence signalling pathway activation in Arabidopsis thaliana on the structure of associated rhizosphere bacterial communities using 16S rRNA gene amplicon pyrosequencing. Application of MeJA did not directly influence bulk soil microbial communities but significant changes in rhizosphere community composition were observed upon activation of the jasmonate signalling pathway. Our results suggest that JA signalling may mediate plant-bacteria interactions in the soil upon necrotrophic pathogen and herbivorous insect attacks.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0056457