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Opposing Effects on Two Phases of Defense Responses from Concerted Actions of HEAT SHOCK COGNATE70 and BONZAI1 in Arabidopsis

文献类型： 外文期刊

作者： Gou, Mingyue 1 ; Zhang, Zemin 1 ; Zhang, Ning 1 ; Huang, Quansheng 1 ; Monaghan, Jacqueline 5 ; Yang, Huijun 1 ; Shi, 1 ;

作者机构： 1.Cornell Univ, Sch Integrated Plant Sci, Plant Biol Sect, Ithaca, NY 14853 USA

2.South China Agr Univ, Coll Agr, State Key Lab Conservat & Utilizat Subtrop Agrobi, Guangzhou 510642, Guangdong, Peoples R China

3.Zhejiang Univ, Inst Nucl Agr Sci, State Key Lab Rice Biol, Hangzhou 310029, Zhejiang, Peoples R China

4.Xinjiang Acad Agr Sci, Inst Nucl & Biol Technol, Urumqi 830091, Peoples R China

5.Norwich Res Pk, Sainsbury Lab, Norwich NR4 7UH, Norfolk, England

6.Chinese Acad Sci, Shanghai

期刊名称：PLANT PHYSIOLOGY （ 影响因子：8.34； 五年影响因子：8.972 ）

ISSN： 0032-0889

年卷期： 2015 年 169 卷 3 期

页码：

收录情况： SCI

摘要： The plant immune system consists of multiple layers of responses targeting various phases of pathogen infection. Here, we provide evidence showing that two responses, one controlling stomatal closure and the other mediated by intracellular receptor proteins, can be regulated by the same proteins but in an antagonistic manner. The HEAT SHOCK COGNATE70 (HSC70), while previously known as a negative regulator of stomatal closure, is a positive regulator of immune responses mediated by the immune receptor protein SUPPRESSOR OF NPR1-1, CONSTITUTIVE1 (SNC1) as well as basal defense responses. In contrast to HSC70, a calcium-binding protein, BONZAI1 (BON1), promotes abscisic acid-and pathogen-triggered stomatal closure in addition to and independent of its previously known negative role in SNC1 regulation. BON1 likely regulates stomatal closure through activating SUPPESSOR OF THE G2 ALLELE OF SKP1 VARIANT B and inhibiting HSC70. New functions of BON1 and HSC70 identified in this study thus reveal opposite effects of each of them on immunity. The opposing roles of these regulators at different phases of plant immune responses exemplify the complexity in immunity regulation and suggest that immune receptors may guard positive regulators functioning at stomatal closure control.

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