脱水反应的元素结合转录因子,GuDREB35,积极调节甘 (Glycyrrhiza uralensis) 的干旱耐受性
Mingming Yang1, Li Liu2, Menghan Li1
1Key Laboratory of Beijing for Identification and Safety Evaluation of Chinese Medicine, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
International journal of biological macromolecules
|March 8, 2025
概括
这项研究确定了甘中79个脱水反应元素结合 (DREB) 基因,发现GuDREB35通过增强抗氧化剂防御和黄酸生产来增强干旱耐受性.
科学领域:
- 植物分子生物学 植物分子生物学
- 无生物应激反应应激反应
- 代谢工程是代谢工程.
背景情况:
- 脱水反应性元素结合 (DREB) 转录因子调节植物对非生物应激的反应.
- 对于DREB基因家族在甘 (Glycyrrhiza uralensis) 干旱耐受性中的作用的理解有限.
研究的目的:
- 在甘基因组中识别和描述DREB基因.
- 阐明特定DREB基因,特别是GuDREB35在干旱耐受性中的功能.
- 为了研究基底的分子机制 GuDREB35介导的耐旱性.
主要方法:
- 79个GuDREB基因的全基因组识别和遗传学分析.
- 在干旱压力条件下的基因表达分析.
- 过度表达和RNA干扰 (RNAi) 测试以评估GuDREB35的功能.
- 转录组分析以确定下游的目标基因.
- 蛋白质-DNA相互作用测定 (例如,ChIP-qPCR) 来确认直接结合.
主要成果:
- 79个GuDREB基因被确定并分为六组.
- 干旱压力显著诱导了GuDREB35的表达.
- 过度表达GuDREB35增强了干旱耐受性和黄类积累.
- 在GuDREB35-RNAi植物中,干旱耐力和黄类植物水平降低.
- GuDREB35激活了抗氧化防御和黄生物合成基因,包括直接与GuBGLU12和GuOMT1促进体结合.
结论:
- GuDREB35在提高甘干旱应激耐受性方面发挥着至关重要的作用.
- 该机制涉及激活抗氧化剂防御和黄类生物合成途径.
- 这为开发抗旱甘品种提供了基础.
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