Novel JAZ co‐operativity and unexpected JA dynamics underpin Arabidopsis defence responses to Pseudomonas syringae infection

• DOI: 10.1111/nph.13683
• Publication Date: 2015-10-02T11:26:38Z
• Authors: Marta de Torres Z...; Bing Zhai; Siddharth Jayaraman; Garoufalia Elefth...; Rebecca Winsbury; Ron Yang; William Truman; Saijung Tang; Nicholas Smirnoff; Murray Grant
• Keywords: Jasmonate; Pseudomonas syringae; Jasmonic acid; Coronatine

Summary Pathogens target phytohormone signalling pathways to promote disease. Plants deploy salicylic acid ( SA )‐mediated defences against biotrophs. antagonize immunity by activating jasmonate signalling, for example Pseudomonas syringae pv. tomato DC 3000 produces coronatine COR ), a jasmonic JA ) mimic. This study found unexpected dynamics between , and co‐operation JAZ repressor proteins during infection. We used systems‐based approach involving targeted hormone profiling, high‐temporal‐resolution micro‐array analysis, reverse genetics mRNA ‐seq. Unexpectedly, foliar did not accumulate until late in the infection process was higher leaves challenged with ‐deficient P. or more resistant receptor mutant coi1 . regulation complex alone insufficient sustainably induce s. s contribute early basal subsequent secondary plant defence responses. showed that 5 10 specifically co‐operate restrict cytotoxicity pathogen growth through transcriptional reprogramming does involve basic helix‐loop‐helix transcription factors MYC 2 related 3 4 previously shown growth. ‐seq predicts compromised jaz5/10 rapid suppression of ‐related components on bacterial