Estradiol-inducible AvrRps4 expression reveals distinct properties of TIR-NLR-mediated effector-triggered immunity.

Abstract:

:Plant nucleotide-binding domain, leucine-rich repeat receptor (NLR) proteins play important roles in recognition of pathogen-derived effectors. However, the mechanism by which plant NLRs activate immunity is still largely unknown. The paired Arabidopsis NLRs RRS1-R and RPS4, that confer recognition of bacterial effectors AvrRps4 and PopP2, are well studied, but how the RRS1/RPS4 complex activates early immediate downstream responses upon effector detection is still poorly understood. To study RRS1/RPS4 responses without the influence of cell surface receptor immune pathways, we generated an Arabidopsis line with inducible expression of the effector AvrRps4. Induction does not lead to hypersensitive cell death response (HR) but can induce electrolyte leakage, which often correlates with plant cell death. Activation of RRS1 and RPS4 without pathogens cannot activate mitogen-associated protein kinase cascades, but still activates up-regulation of defence genes, and therefore resistance against bacteria.

journal_name

J Exp Bot

authors

Ngou BPM,Ahn HK,Ding P,Redkar A,Brown H,Ma Y,Youles M,Tomlinson L,Jones JDG

doi

10.1093/jxb/erz571

subject

Has Abstract

pub_date

2020-03-25 00:00:00

pages

2186-2197

issue

6

eissn

0022-0957

issn

1460-2431

pii

5734761

journal_volume

71

pub_type

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