1. The transcription factor ZmMYB-CC10 improves drought tolerance by activating ZmAPX4 expression in maize.
- Author
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Zhang, Gaofeng, Li, Guangdong, Xiang, Yang, and Zhang, Aying
- Subjects
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DROUGHT tolerance , *TRANSCRIPTION factors , *CORN - Abstract
MYB transcription factors play a vital role in response to stress in plant. MYB-CC transcription factors belong to MYB transcription factors, which contain a conserved MYB DNA-binding domain and a coiled-coil (CC) domain. MYB-CC transcription factors participate in the process of plant drought tolerance. However, the underlying molecular mechanisms of ZmMYB-CC in regulating drought tolerance are still largely unknown. Here, we found that ZmMYB-CC10 enhanced drought tolerance by reducing oxidative damage in maize. Further, ZmMYB-CC10 improves the activity of APX and decreases the content of H 2 O 2. Overexpression of ZmMYB-CC10 increases the expression of ZmAPX4 under drought stress. Luciferase assays and Yeast one-hybrid assays (Y1H) showed that ZmMYB-CC10 activates the expression of ZmAPX4 by directly binding to its promoter. Taken together, our results demonstrate that ZmMYB-CC10 enhances tolerance to drought stress by directly activating ZmAPX4 expression, thereby reducing H 2 O 2 content. • ZmMYB-CC10 enhances drought tolerance by reducing oxidative damage in maize. • ZmMYB-CC10 decreases the content of H 2 O 2 by increasing the activity of APX under drought stress. • ZmMYB-CC10 directly binds to ZmAPX4 promotor and activates its expression. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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