米基因激活蛋白激酶调节血清的积累,并在长时间暴露于UV-B辐射下与细胞循环调节剂相互作用
Gopal Banerjee1, Dhanraj Singh1, Chandana Pandey1
1National Institute of Plant Genome Research, Aruna Asaf Ali Road, New Delhi, 110067, India.
Plant physiology and biochemistry : PPB
|October 13, 2023
概括
紫外线B辐射触发了米米激活蛋白激酶 (MAPK) 路径,影响了基因表达和血清生物合成. 然而,过度表达MPK3和MPK6会损害大米,降低UV-B的耐受性.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物应激反应 植物应激反应
- 文字转录学 (Transcriptomics) 是一个学科.
背景情况:
- 紫外线B辐射对植物构成重大威胁,包括光系统损伤,DNA病变和反应性氧物种 (ROS) 生成.
- 已知基激活蛋白激酶 (MAPKs) 被激活的压力条件在植物如阿拉比多普西斯和大米.
研究的目的:
- 为了研究暴露于UV-B辐射的苗的全球转录基因变化.
- 阐明MAPK信号在米对UV-B应激反应中的作用.
- 了解MPK3和MPK6在UV-B耐受性和细胞周期调节中的功能.
主要方法:
- 全球转录对短期 (1小时) 和长期 (16小时) 紫外线B辐射暴露的苗进行分析.
- 对MPK3和MPK6.6的诱导性过度表达转基因大米系中特定基因的表达分析.
- 分析MPK3/MPK6和细胞循环抑制剂之间的蛋白相互作用.
- 评估转基因系中的UV-B耐受性和细胞死亡.
主要成果:
- 长期暴露于UV-B (16小时) 导致大米苗转录组发生显著变化,影响细胞循环和代谢途径.
- 紫外线B辐射激活了MAPK信号级联,这种信号级联在单种植物和双种植物中都存在.
- 过度表达MPK3和MPK6导致植物和血清生物合成基因的表达增加,血清水平升高与MPK转录水平相关.
- MPK3和MPK6与细胞循环抑制剂 (WEE1,SMR1) 相互作用,表明它们在压力诱导的细胞循环调节中起作用.
- 过度表达MPK3和MPK6导致的细胞死亡增加和UV-B耐受性降低.
结论:
- MAPK信号通路,特别是MPK3和MPK6,在米对UV-B压力的反应中起着至关重要的作用,影响基因表达和血清素积累.
- 虽然MPK3和MPK6参与应激反应,但它们的过度表达对大米有害,导致UV-B耐受性受损,细胞死亡增加.
- 了解MPK3和MPK6的复杂作用对于开发提高植物应激弹性策略至关重要.
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