OsWRKY62 is a Negative Regulator of Basal and Xa21-Mediated Defense against Xanthomonas oryzae pv. oryzae in Rice

Autor: Chris Dardick, Xuewei Chen, Mawsheng Chern, Ying Peng, Patrick E. Canlas, Randy Ruan, Pamela C. Ronald, Laura E. Bartley
Rok vydání: 2008
Předmět:
Zdroj: Peng, Ying; Bartley, Laura E; Chen, Xuewei; Dardick, Christopher; Chern, Mawsheng; Ruan, Randy; et al.(2008). OsWRKY62 is a negative regulator of basal and Xa21-mediated defense against Xanthomonas oryzae pv. oryzae in rice.. Molecular plant, 1(3), 446-458. UC Davis: Retrieved from: http://www.escholarship.org/uc/item/50j187hq
ISSN: 1674-2052
Popis: 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.
Databáze: OpenAIRE