数字农科院2.0

miR398b negatively regulates cotton immune responses to Verticillium dahliae via multiple targets

文献类型： 外文期刊

作者： Miao, Yuhuan;Chen, Kun;Deng, Jinwu;Zhang, Lin;Wang, Weiran;Kong, Jie;Klosterman, Steven J.;Zhang, Xianlong;Aierxi, Alifu;Zhu, Longfu

作者机构：

关键词： Cotton;miR398b;NBS-LRR;ROS homeostasis;Verticillium dahliae

期刊名称： CROP JOURNAL

ISSN： 2095-5421

年卷期： 2022 年 10 卷 4 期

页码：

收录情况： SCIE（2022版） ; CSCD（2021-2022年度） ; 科技核心（2021版） ; 农林核心（2020版）

摘要： MicroRNAs (miRNAs) play essential roles in plant defense responses, although such roles have not been identified in cotton in response to the plant pathogenic fungus Verticillium dahliae. In this study, the func-tions of miR398b and its target genes in cotton -V. dahliae interaction were investigated. The transcript levels of miR398b were down-regulated by V. dahliae infection and miR398b overexpression in cotton made the plants more susceptible to V. dahliae. The results suggest that miR398b negatively regulates cotton resistance to V. dahliae. This may occur by miR398b repression of some CC-NBS-LRR genes via translational inhibition, interfering with defense responses and leading to cotton susceptibility to V. dah-liae. Alternatively, miR398b may guide the cleavage of the mRNAs of GhCSD1, GhCSD2 and GhCCS, each of which functions in reactive oxygen species (ROS) regulation and homeostasis, thereby causing excessive ROS accumulation in miR398b-overexpressing plants in response to V. dahliae infection. This study sug-gests conserved and novel roles of miR398b in the cotton-V. dahliae interaction. These discoveries may be coupled with new strategies in cotton breeding programs to improve resistance to V. dahliae. (c) 2022 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC -ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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