A Putative RNA-Binding Protein Positively Regulates Salicylic Acid-Mediated Immunity in Arabidopsis

被引：36

作者：

Qi, Yiping ^{[1
]}

Tsuda, Kenichi ^{[1
]}

Joe, Anna ^{[2
,3
,4
]}

Sato, Masanao ^{[1
]}

Nguyen, Le V. ^{[1
]}

Glazebrook, Jane ^{[1
]}

Alfano, James R. ^{[2
,3
]}

Cohen, Jerry D. ^{[5
]}

Katagiri, Fumiaki ^{[1
]}

机构：

[1] Univ Minnesota, Dept Plant Biol, Microbial & Plant Genom Inst, St Paul, MN 55108 USA

[2] Univ Nebraska, Ctr Plant Sci Innovat, Lincoln, NE 68588 USA

[3] Univ Nebraska, Dept Plant Pathol, Lincoln, NE 68588 USA

[4] Univ Nebraska, Sch Biol Sci, Lincoln, NE 68588 USA

[5] Univ Minnesota, Dept Hort Sci, St Paul, MN 55108 USA

来源：

MOLECULAR PLANT-MICROBE INTERACTIONS | 2010年 / 23卷 / 12期

基金：

美国国家科学基金会; 美国国家卫生研究院; 日本学术振兴会;

关键词：

DISEASE RESISTANCE GENE; HYPERSENSITIVE RESPONSE; SYRINGAE; DEFENSE; THALIANA; EXPRESSION; EFFECTOR; PATHWAYS; ENCODES; TOMATO;

D O I：

10.1094/MPMI-05-10-0106

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

RNA-bmdmg 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-bind mg 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 is a positive regulator of SA-mediated immunity, possibly acting on SA signaling-related genes at a post-transcriptional level

引用

页码：1573 / 1583

页数：11