Flavonol synthase gene MsFLS13 regulates saline-alkali stress tolerance in alfalfa

文献类型： 外文期刊

第一作者： Zhang, Lishuang

作者： Zhang, Lishuang;Sun, Yugang;Ji, Jinqiang;Zhao, Weidi;Guo, Weileng;Li, Jiaqi;Bai, Yan;Wang, Dan;Guo, Changhong;Yan, Zhe

作者机构：

关键词： Alfalfa; Saline-alkali; Msfls13; Msmyb12; Antioxidant

期刊名称：CROP JOURNAL （ 影响因子：6.6； 五年影响因子：6.5 ）

ISSN： 2095-5421

年卷期： 2023 年 11 卷 4 期

页码：

收录情况： SCI

摘要： Alfalfa (Medicago sativa L.) is one of the most extensively grown leguminous forage worldwide. Environmental saline-alkali stress significantly influences the growth, development, and yield of alfalfa, posing a threat to its agricultural production. However, little is known about the potential mechanisms by which alfalfa responds to saline-alkali stress. Here, we investigated these mechanisms by cloning a saline-alkali-induced flavonol synthase gene (MsFLS13) from alfalfa, which was previously reported to be significantly upregulated under saline-alkali stress, and examining its function in the saline-alkali response. Overexpression of MsFLS13 in alfalfa promoted plant tolerance to saline-alkali stress by enhancing flavonol accumulation, antioxidant capacity, osmotic balance, and photosynthetic efficiency. Conversely, MsFLS13 inhibition using RNA interference reduced flavonol synthase activity and inhibited hairy root growth under saline-alkali stress. Yeast one-hybrid and dual-luciferase reporter assays indicated that the R2R3-MYB MsMYB12 transcription factor activates MsFLS13 expression by binding to the MBS motif in the MsFLS13 promoter. Further analysis revealed that abscisic acid mediates the salinealkali stress response partially by inducing MsMYB12 and MsFLS13 expression, which consequently increases flavonol levels and maintains antioxidant homeostasis in alfalfa. Collectively, our findings highlight the crucial role of MsFLS13 in alfalfa in response to saline-alkali stress and provide a novel genetic resource for creating saline-alkali-resistant alfalfa through genetic engineering.(c) 2023 Crop Science Society of China and Institute of Crop Science, CAAS. Publishing services 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/).

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序