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Keywords = ZmDST44

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12 pages, 3804 KB  
Article
ZmDST44 Gene Is a Positive Regulator in Plant Drought Stress Tolerance
by Wenbo Chai, Hongtao Li, Hanyuan Xu, Qing Zhu, Shufen Li, Chao Yuan, Wei Ji, Jun Wang and Lei Sheng
Biology 2024, 13(8), 552; https://doi.org/10.3390/biology13080552 - 23 Jul 2024
Cited by 2 | Viewed by 1718
Abstract
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 [...] Read more.
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. Full article
(This article belongs to the Section Plant Science)
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