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
作者： Zhao, Zhiying 1 ; Tang, Sha 2 ; Li, Wei 3 ; Yang, Xiaorui 4 ; Wang, Ruiju 1 ; Diao, Xianmin 2 ; Tang, Wenqiang 1 ;
作者机构： 1.Hebei Normal Univ, Hebei Collaborat Innovat Ctr Cell Signaling, Hebei Key Lab Mol & Cellular Biol, Minist Educ,Key Lab Mol & Cellular Biol,Coll Life, Shijiazhuang 050024, Hebei, Peoples R China
2.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China
3.Hebei Acad Agr & Forestry Sci, Foxtail Millet Improvement Ctr China, Inst Millet Crops, Shijiazhuang 050031, Hebei, Peoples R China
4.Hebei Univ Sci & Technol, Coll Biosci & Bioengn, Shijiazhuang 050018, Hebei, Peoples R China
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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