Overexpression of a BRASSINAZOLE RESISTANT 1 homolog attenuates drought tolerance by suppressing the expression of PLETHORA-LIKE 1 in Setaria italica

文献类型： 外文期刊

第一作者： Zhao, Zhiying

作者： Zhao, Zhiying;Wang, Ruiju;Tang, Wenqiang;Tang, Sha;Diao, Xianmin;Li, Wei;Diao, Xianmin;Yang, Xiaorui

作者机构：

关键词： SiBZR1; SiPLT-L1; Brassinosteroids; Drought tolerance; Foxtail millet

期刊名称：CROP JOURNAL （ 影响因子：4.407； 五年影响因子：5.687 ）

ISSN： 2095-5421

年卷期： 2021 年 9 卷 5 期

页码：

收录情况： SCI

摘要： Two potential BRASSINAZOLE RESISTANT 1 (BZR1) homologs were downregulated by brassinosteroids (BRs) in Setaria italica roots. Functional analysis showed that BR regulates the dephosphorylation and nuclear localization of SiBZR1 and that SiBZR1 binds conserved BZR1-recognizing cis elements. In comparison with the wild type, SiBZR1-overexpressing S. italica seedlings were more sensitive to BR-inhibited primary root growth and drought stress, indicating that SiBZR1 is a positive regulator of BR signaling and a negative regulator of drought tolerance in S. italica. PLETHORA-LIKE 1 (SiPLT-L1) was found to be a direct target gene of SiBZR1 in S. italica roots. The expression of SiPLT-L1 was downregulated by SiBZR1. SiPLT-L1-overexpressing S. italica was less sensitive to BR-inhibited root growth and more tolerant to drought stress, possibly owing to the upregulation of drought-inducible Dehydrin-family genes. (C) 2021 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.

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