Plastic Transcriptomes Stabilize Immunity to Pathogen Diversity: The Jasmonic Acid and Salicylic Acid Networks within the Arabidopsis/Botrytis Pathosystem.

Abstract

To respond to pathogen attack, selection and associated evolution has led to the creation of plant immune system that are a highly effective and inducible defense system. Central to this system are the plant defense hormones jasmonic acid (JA) and salicylic acid (SA) and crosstalk between the two, which may play an important role in defense responses to specific pathogens or even genotypes. Here, we used the Arabidopsis thaliana-Botrytis cinerea pathosystem to test how the host's defense system functions against genetic variation in a pathogen. We measured defense-related phenotypes and transcriptomic responses in Arabidopsis wild-type Col-0 and JA- and SA-signaling mutants, coi1-1 and npr1-1, individually challenged with 96 diverse B. cinerea isolates. Those data showed genetic variation in the pathogen influences on all components within the plant defense system at the transcriptional level. We identified four gene coexpression networks and two vectors of defense variation triggered by genetic variation in B. cinerea This showed that the JA and SA signaling pathways functioned to constrain/canalize the range of virulence in the pathogen population, but the underlying transcriptomic response was highly plastic. These data showed that plants utilize major defense hormone pathways to buffer disease resistance, but not the metabolic or transcriptional responses to genetic variation within a pathogen.

• Authors: Wei Zhang, Jason A Corwin, Daniel Copeland, Julie Feusier, Robert Eshbaugh, Fang Chen, Susana Atwell, Daniel J Kliebenstein
• Journal: The Plant cell (Plant Cell) Vol. 29 Issue 11 Pg. 2727-2752 (Nov 2017) ISSN: 1532-298X [Electronic] England
• PMID: 29042403 (Publication Type: Journal Article)
• Copyright: © 2017 American Society of Plant Biologists. All rights reserved.

Chemical References

• Arabidopsis Proteins
• Cyclopentanes
• Indoles
• Oxylipins
• Thiazoles
• camalexin
• jasmonic acid
• Salicylic Acid

Topics

• Arabidopsis (genetics, metabolism, microbiology)
• Arabidopsis Proteins (genetics)
• Botrytis (genetics, physiology)
• Cyclopentanes (metabolism)
• Disease Resistance (genetics, immunology)
• Gene Expression Regulation, Plant
• Gene Regulatory Networks
• Genotype
• Host-Pathogen Interactions (genetics)
• Indoles
• Mutation
• Oxylipins (metabolism)
• Plant Diseases (genetics, immunology, microbiology)
• Salicylic Acid (metabolism)
• Signal Transduction (genetics)
• Thiazoles
• Transcriptome