A putative RNA-binding protein positively regulates salicylic acid-mediated immunity in Arabidopsis

Molecular Plant-microbe Interactions : MPMI
Yiping QiFumiaki Katagiri

Abstract

RNA-binding proteins (RBP) can control gene expression at both transcriptional and post-transcriptional levels. Plants respond to pathogen infection with rapid reprogramming of gene expression. However, little is known about how plant RBP function in plant immunity. Here, we describe the involvement of an RBP, Arabidopsis thaliana RNA-binding protein-defense related 1 (AtRBP-DR1; At4g03110), in resistance to the pathogen Pseudomonas syringae pv. tomato DC3000. AtRBP-DR1 loss-of-function mutants showed enhanced susceptibility to P. syringae pv. tomato DC3000. Overexpression of AtRBP-DR1 led to enhanced resistance to P. syringae pv. tomato DC3000 strains and dwarfism. The hypersensitive response triggered by P. syringae pv. tomato DC3000 avrRpt2 was compromised in the Atrbp-dr1 mutant and enhanced in the AtRBP-DR1 overexpression line at early time points. AtRBP-DR1 overexpression lines showed higher mRNA levels of SID2 and PR1, which are salicylic acid (SA) inducible, as well as spontaneous cell death in mature leaves. Consistent with these observations, the SA level was low in the Atrbp-dr1 mutant but high in the overexpression line. The SA-related phenotype in the overexpression line was fully dependent on SID2. Thus, AtRBP-DR1...Continue Reading

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Citations

Jul 16, 2011·The Journal of Biological Chemistry·Yiping QiFumiaki Katagiri
Jun 11, 2014·PloS One·Clémentine Le RouxValérie Gaudin
Jan 1, 2011·Journal of Pathogens·Virginia WoloshenXin Li
May 30, 2012·The Plant Journal : for Cell and Molecular Biology·Dong Hyuk LeeByung Kook Hwang
Nov 21, 2012·The New Phytologist·Dorothee StaigerLionel Navarro
Aug 22, 2013·Plant, Cell & Environment·Christian HackmannDorothee Staiger
Oct 30, 2016·BMC Genomics·Delasa AghamirzaieRuth Grene
Sep 24, 2020·Proceedings. Biological Sciences·C Marondedze
Mar 5, 2018·Bio-protocol·Noriyuki Hatsugai, Fumiaki Katagiri

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