Deficiencies in Jasmonate-Mediated Plant Defense Reveal Quantitative Variation in Botrytis cinerea Pathogenesis

PLoS Pathogens

Katayoon Dehesh¹  Justin W. Walley¹  Jason Corwin²  Heather C. Rowe²  Daniel J. Kliebenstein²  Eva K.-F. Chan² 

[1] Department of Plant Biology, University of California Davis, Davis, California, United States of America;Department of Plant Sciences, University of California Davis, Davis, California, United States of America

关键词: Leaves;    Arabidopsis thaliana;    Plant defenses;    Plant pathogens;    Biosynthesis;    Necrotrophic pathogens;    Plant fungal pathogens;    Pathogens;   

DOI  :  10.1371/journal.ppat.1000861

学科分类：生物科学（综合）

来源: Public Library of Science

【 摘 要 】

Despite the described central role of jasmonate signaling in plant defense against necrotrophic pathogens, the existence of intraspecific variation in pathogen capacity to activate or evade plant jasmonate-mediated defenses is rarely considered. Experimental infection of jasmonate-deficient and jasmonate-insensitive Arabidopsis thaliana with diverse isolates of the necrotrophic fungal pathogen Botrytis cinerea revealed pathogen variation for virulence inhibition by jasmonate-mediated plant defenses and induction of plant defense metabolites. Comparison of the transcriptional effects of infection by two distinct B. cinerea isolates showed only minor differences in transcriptional responses of wild-type plants, but notable isolate-specific transcript differences in jasmonate-insensitive plants. These transcriptional differences suggest B. cinerea activation of plant defenses that require plant jasmonate signaling for activity in response to only one of the two B. cinerea isolates tested. Thus, similar infection phenotypes observed in wild-type plants result from different signaling interactions with the plant that are likely integrated by jasmonate signaling.

【 授权许可】

CC BY