数字农科院2.0

Ghr-miR166b-GhHB14 Pair With GhDLO1 Partner Mediates Cotton Plant Defence Against Verticillium dahliae

文献类型： 外文期刊

作者： Meng, Yuan;Zhao, Ge;Tang, Ye;Xu, Lin;Li, Dongliang;Ge, Xiaoyang;Wu, Jiahe

作者机构：

关键词： cotton;Verticillium dahliae;ghr-miR166b;GhHB14;GhDLO1

期刊名称： MOLECULAR PLANT PATHOLOGY

ISSN： 1464-6722

年卷期： 2025 年 26 卷 6 期

页码：

收录情况： SCIE（2025版）

摘要： In plants, the class III homeodomain-leucine zipper (HD-ZIP III) transcription factors regulate a broad range of developmental processes. However, less research on HD-ZIP IIIs has been done on Verticillium wilt, which is a devastating disease of cotton production worldwide. Here, we report that a cotton HD-ZIP III (GhHB14) targeted by ghr-miR166b participates in plant resistance to Verticillium wilt. According to degradome data, RACE sequencing and in vivo fluorescent light assay, ghr-miR166b can target GhHB14 mRNA to directly cleave it at nucleotide position 586, suggesting that GhHB14 expression is mediated by a post-transcriptional process. Yeast two-hybrid and bimolecular fluorescence complementation analyses showed that GhHB14 can interact with GhDLO1 in cells. Plants silenced for ghr-miR166b showed significantly higher susceptibility to Verticillium dahliae infection compared to the control, while GhHB14- and GhDLO1-silenced plants exhibited significantly higher resistance. These results suggested that ghr-miR166b is a positive regulator in plant resistance against Verticillium wilt, whereas GhHB14 and GhDLO1 are both negative regulators. Therefore, ghr-miR166b-GhHB14 coupled with GhDLO1 regulates cotton plant defence against V. dahliae.

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