OsWRKY62 is a negative regulator of basal and Xa21-mediated defense against Xanthomonas oryzae pv. oryzae in rice

被引：220

作者：

Peng, Ying ^{[1
]}

Bartley, Laura E. ^{[1
]}

Chen, Xuewei ^{[1
]}

Dardick, Christopher ^{[1
]}

Chern, Mawsheng ^{[1
]}

Ruan, Randy ^{[1
]}

Canlas, Patrick E. ^{[1
]}

Ronald, Pamela C. ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Plant Pathol, Davis, CA 95616 USA

来源：

MOLECULAR PLANT | 2008年 / 1卷 / 03期

基金：

美国国家卫生研究院;

关键词：

rice; OsWRKY62; Xa21; defense response;

D O I：

10.1093/mp/ssn024

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：

The rice Xa21 gene, which confers resistance to the bacterial pathogen Xanthomonas oryzae pv. oryzae (Xoo), encodes a receptor-like kinase. Few components involved in transducing the Xa21-mediated defense response have yet been identified. Here, we report that XA21 binds to a WRKY transcription factor, called OsWRKY62. The OsWRKY62 gene encodes two splice variants (OsWRKY62.1 and OsWRKY62.2). OsWRKY62.1:smGFP2 and OsWRKY62.2: smGFP2 fusion proteins partially localize to the nucleus. Transgenic plants overexpressing OsWRKY62.1 are compromised in basal defense and Xa21-mediated resistance to Xoo. Furthermore, overexpression of OsWRKY62.1 suppresses the activation of defense-related genes. These results imply that OsWRKY62 functions as a negative regulator of innate immunity in rice, and serves as a critical mediator of both basal and race-specific defense responses.

引用

页码：446 / 458

页数：13

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