NAC转录因子MdNAC4通过增强果中的ABA生物合成来积极调节缺乏引起的叶子衰老
Binbin Wen1, Xuehui Zhao2, Xingyao Gong1
1State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, China.
Molecular horticulture
|October 3, 2023
概括
缺会导致叶子衰老. 研究人员发现,酸 (ABA) 和MdNAC4蛋白相互作用,通过调节ABA生物合成和与衰老相关的基因来促进这一过程.
科学领域:
- 植物生物学 植物生物学
- 分子植物生理学分子植物生理学
- 农业科学 农业科学
背景情况:
- 缺是已知的叶子衰老的诱导因素.
- 在缺乏引起的叶子衰老背后的精确分子机制尚未完全理解.
研究的目的:
- 阐明对酸 (ABA) 敏感的NAC转录因子在缺乏引起的叶子衰老中的作用.
- 研究果中ABA,MdNAC4和衰老相关基因之间的相互作用.
主要方法:
- 在果里MdNAC4的过度表达.
- 测量ABA水平和ABA生物合成基因的表达 (MdNCED2).
- 对衰老相关基因 (MdSAG39) 表达和促进体结合的分析.
- 在MdNAC4和ABA受体MdPYL4.4之间进行蛋白质-蛋白质相互作用研究.
主要成果:
- 通过激活MdNCED2转录,MdNAC4的过度表达增加了ABA水平.
- MdNAC4直接上调了与衰老相关的基因MdSAG39.3的表达.
- ABA增强了MdNAC4的功能,促进了由缺乏引起的叶子衰老.
- 确定了MdNAC4和ABA受体MdPYL4之间的相互作用,MdPYL4表现出类似的功能.
结论:
- 酸在缺乏引起的叶子衰老中起着至关重要的作用.
- MdPYL4与MdNAC4相互作用,增强其对缺乏的反应,并促进叶子衰老.
- MdNAC4是缺乏引起的叶子衰老的ABA介导途径的关键调节者.
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