文献类型： 外文期刊
作者： Yang, Zhirui 1 ; Huang, Yu 1 ; Yang, Jialin 2 ; Yao, Shengze 1 ; Zhao, Kun 1 ; Wang, Donghui 1 ; Qin, Qingqing 1 ; Bian, 1 ;
作者机构： 1.Peking Univ, Sch Life Sci, State Key Lab Prot & Plant Gene Res, Beijing 100871, Peoples R China
2.Peking Univ, Acad Adv Interdisciplinary Studies, Beijing 100871, Peoples R China
3.Tsinghua Univ, Ctr Plant Biol, Tsinghua Peking Ctr Life Sci, Sch Life Sci, Beijing 100084, Peoples R China
4.Jiangsu Acad Agr Sci, Inst Plant Protect, Nanjing 210014, Peoples R China
5.Sichuan Agr Univ, Rice Res Inst, Chengdu 611130, Peoples R China
6.Sichuan Agr Univ, Coll Agron, Chengdu 611130, Peoples R China
期刊名称：CELL HOST & MICROBE （ 影响因子：21.023； 五年影响因子：22.103 ）
ISSN： 1931-3128
年卷期： 2020 年 28 卷 1 期
页码：
收录情况： SCI
摘要： Small RNA-mediated RNA silencing is an important antiviral mechanism in higher plants. It has been shown that RNA silencing components can be upregulated by viral infection. However, the mechanisms underlying the upregulation remain largely unknown. Here, we show that jasmonate (JA) signaling transcriptionally activates Argonaute 18 (AGO18), a core RNA silencing component that promotes rice antiviral defense through sequestering miR168 and miR528, which repress key antiviral defense proteins. Mechanistically, the JA-responsive transcription factor JAMYB directly binds to the AGO18 promoter to activate AGO18 transcription. Rice stripe virus (RSV) coat protein (CP) triggers JA accumulation and upregulates JAMYB to initiate this host defense network. Our study reveals that regulatory crosstalk exists between the JA signaling and antiviral RNA silencing pathways and elucidates a molecular mechanism for CP-mediated viral resistance in monocot crops.
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