文献类型： 外文期刊
作者： Chai, Wenbo 1 ; Li, Hongtao 1 ; Xu, Hanyuan 1 ; Zhu, Qing 1 ; Li, Shufen 1 ; Yuan, Chao 1 ; Ji, Wei 1 ; Wang, Jun 1 ; Sheng, Lei 2 ;
作者机构： 1.Lianyungang Acad Agr Sci, Lianyungang 222006, Peoples R China
2.Anhui Acad Agr Sci, Hefei 230036, Peoples R China
关键词： maize; drought tolerance; ZmmiR139; ZmDST44
期刊名称：BIOLOGY-BASEL （ 影响因子：3.5； 五年影响因子：4.0 ）
ISSN：
年卷期： 2024 年 13 卷 8 期
页码：
收录情况： SCI
摘要： Improving drought tolerance in plants is essential for increasing crop yields under water-limited conditions. In this study, we investigated the functional role of the maize gene ZmDST44, which is targeted by the miRNA ZmmiR139. Our results indicate that ZmmiR139 regulates ZmDST44 by cleaving its mRNA, as confirmed by inverse expression patterns and 5 '-RACE analysis. Overexpression of ZmDST44 in Arabidopsis, rice, and maize resulted in significant enhancements in drought tolerance. Transgenic plants exhibited reduced malondialdehyde (MDA) levels, increased proline accumulation, and upregulation of drought-responsive genes compared to wild-type plants. Transgenic Arabidopsis and rice showed improved drought resistance and higher post-drought recovery rates, and transgenic maize displayed lower sensitivity to drought stress. These findings suggest that ZmDST44 acts as a positive regulator of drought tolerance across different plant species and holds promise for developing drought-resistant crops through genetic engineering.
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