Abscisic acid negatively modulates plant defence against rice black-streaked dwarf virus infection by suppressing the jasmonate pathway and regulating reactive oxygen species levels in rice

文献类型： 外文期刊

第一作者： Xie, Kaili

作者： Xie, Kaili;Zhang, Hehong;Wang, Rong;Sun, Zongtao;Chen, Jianping;Xie, Kaili;Li, Junmin;Yan, Fei;Sun, Zongtao;Chen, Jianping;Xie, Kaili;Li, Lulu;Zhang, Hehong;Wang, Rong;Tan, Xiaoxiang;He, Yuqing;Hong, Gaojie;Li, Lulu;Ming, Feng;Yao, Xuefeng

作者机构：

关键词： abscisic acid (ABA); jasmonate (JA); reactive oxygen species (ROS); rice black-streaked dwarf virus (RBSDV)

期刊名称：PLANT CELL AND ENVIRONMENT （ 影响因子：7.228； 五年影响因子：7.791 ）

ISSN： 0140-7791

年卷期： 2018 年 41 卷 10 期

页码：

收录情况： SCI

摘要： Abscisic acid (ABA) plays a multifaceted role in plant immunity and can either increase resistance or increase susceptibility to some bacterial and fungal pathogens depending on the pathosystem. ABA is also known to mediate plant defence to some viruses. In this study, the relationship between the ABA pathway and rice black-streaked dwarf virus (RBSDV) was investigated in rice. The expression of ABA pathway genes was significantly reduced upon RBSDV infection. Application of exogenous hormones and various ABA pathway mutants revealed that the ABA pathway plays a negative role in rice defence against RBSDV. Exogenous hormone treatment and virus inoculation showed that ABA inhibits the jasmonate-mediated resistance to RBSDV. ABA treatment also suppressed accumulation of reactive oxygen species by inducing the expression of superoxidase dismutases and catalases. Thus, ABA modulates the rice-RBSDV interaction by suppressing the jasmonate pathway and regulating reactive oxygen species levels. This is the first example of ABA increasing susceptibility to a plant virus. The multifaceted roles of abscisic acid (ABA) in response to bacterial or fungal pathogens have been widely studied, but only ABA-mediated defence has been reported for plant viruses. In this study, the relationship between the ABA pathway and rice black-streaked dwarf virus was investigated. By using exogenous chemical treatment and various ABA mutants, we demonstrate that the ABA pathway plays a negative role in rice defence against viral infection. Further investigation showed that ABA-mediated susceptibility to viral infection operates by suppressing the jasmonate pathway and preventing reactive oxygen species accumulation. To our knowledge, this is the first example of ABA increasing susceptibility to a plant virus.

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