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title: The WRKY57 Transcription Factor Affects the Expression of Jasmonate ZIM-Domain Genes Transcriptionally to Compromise Botrytis cinerea Resistance
author: Jiang, Yanjuan;  Yu, Diqiu
Issued Date: 2016
Abstract: Although necrotrophic pathogens cause many devastating plant diseases, our understanding of the plant defense response to them is limited. Here, we found that loss of function of WRKY57 enhanced the resistance of Arabidopsis (Arabidopsis thaliana) against Botrytis cinerea infection. Further investigation suggested that the negative regulation of WRKY57 against B. cinerea depends on the jasmonic acid (JA) signaling pathway. Chromatin immunoprecipitation experiments revealed that WRKY57 directly binds to the promoters of JASMONATE ZIM-DOMAIN1 (JAZ1) and JAZ5, encoding two important repressors of the JA signaling pathway, and activates their transcription. In vivo and in vitro experiments demonstrated that WRKY57 interacts with nuclear-encoded SIGMA FACTOR BINDING PROTEIN1 (SIB1) and SIB2. Further experiments display that the same domain, the VQ motif, of SIB1 and SIB2 interact with WRKY33 and WRKY57. Moreover, transient transcriptional activity assays confirmed that WRKY57 and WRKY33 competitively regulate JAZ1 and JAZ5, SIB1 and SIB2 further enhance these competitions of WRKY57 to WRKY33. Therefore, coordinated regulation of Arabidopsis against B. cinerea by transcription activators and repressors would benefit plants by allowing fine regulation of defense
Source: PLANT PHYSIOLOGY
Appears in Collections:植物分子生物学研究组_期刊论文

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Recommended Citation:
Jiang, Yanjuan,Yu, Diqiu. The Wrky57 Transcription Factor Affects The Expression Of Jasmonate Zim-domain Genes Transcriptionally To Compromise Botrytis Cinerea Resistance[J]. Plant Physiology,2016,171(4):2771-2782.

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