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The actin motor protein OsMYA1 associates with OsExo70H1 and contributes to rice secretory defense by modulating OsSyp121 distribution

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Journal of Integrative Plant Biology 2024年第9期66卷 2058-2075页

作者： Yuan‐Bao Li Chengyu Liu Ningning Shen Shuai Zhu Xianya Deng Zixuan Liu Li‐Bo Han Dingzhong Tang State Key Laboratory of Ecological Control of Fujian‐Taiwan Crop Pests Key Laboratory of Ministry of Education for GeneticsBreeding and Multiple Utilization of CropsPlant Immunity CenterFujian Agriculture and Forestry UniversityFuzhou 350002China College of Agriculture Fujian Agriculture and Forestry UniversityFuzhou 350002China College of Life Sciences Fujian Agriculture and Forestry UniversityFuzhou 350002China School of Future Technology Fujian Agriculture and Forestry UniversityFuzhou 350002China

Magnaporthe oryzae(***)is a devastating hemibiotrophic *** biotrophic invasive hyphae(IH)are enclosed in the extrainvasive hyphal membrane produced by plant cells,thus generating a front line of the battlefield between the pathogen and the host *** plants,defense-related complexes such as proteins,callose-rich materials and vesicles,are directionally secreted to this interface to confer defense responses,but the underlying molecular mechanism is poorly *** this study,we found that a Myosin gene,Myosin A1(OsMYA1),contributed to rice *** OsMYA1 knockout mutant exhibited decreased resistance to *** ***1 localizes to the actin cytoskeleton and surrounds the IH of ***1 interacts with an exocyst subunit,OsExo70H1,and regulates its accumulation at the plasma membrane(PM)and pathogen–plant ***,OsExo70H1 interacted with the rice syntaxin of the plants121 protein(OsSyp121),and the distribution of OsSyp121 to the PM or the pathogen–plant interface was disrupted in both the OsMYA1 and OsExo70H1 ***,these results not only reveal a new function of OsMYA1 in rice blast resistance,but also uncover a molecular mechanism by which plants regulate defense against *** by OsMYA1-initiated vesicle secretory pathway,which originates from the actin cytoskeleton to the PM.

关键词： cytoskeleton plant defense mechanism rice blast vesicle delivery

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