使用植物染色体B的黑暗逆转变种,phyB[G515E]调节温暖温度敏感生长,在阿拉比多普西斯和大米中
Jin Jeon1, Md Mizanor Rahman2, Hee Wook Yang1
1Department of Biological Sciences, Chungnam National University, Daejeon 34134, Republic of Korea.
Journal of advanced research
|November 5, 2023
概括
通过使用遗传变异来改变植物色素B (phyB) 暗反转率,可以减少植物中因热引起的阴囊延长. 这种方法为工程工厂提供了一种新的方法,可以提高耐热性.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 视觉遗传学 视觉遗传学
背景情况:
- 环境温度影响植物的生长,主要是通过阿拉比多普西斯幼苗的 hypocotyl 延伸.
- 植物染色体B (phyB) 作为热传感器,启动一个信号级联,涉及植物染色体相互作用因子4 (PIF4) 和辅酶生物合成.
- phyB-PIF4模块是开发对高温敏感度降低的植物的关键目标.
研究的目的:
- 通过在翻译后水平上修改植物染色体B (phyB) 来操纵温暖温度诱导的植物延长.
- 为了研究phyB变异的作用,改变了暗色反转率在热形态发生.
- 评估这些变体在工程耐热植物中的潜力.
主要方法:
- 阿拉比多普西斯·塔利亚纳 (Arabidopsis thaliana) 被设计为在热冲击诱导性促进体下表达具有改变暗回归率的phyB变体 (例如,phyB[G515E],phyB[G564E],phyB[S584F],phyB[G767R)).
- 热敏生长反应通过在高温下测量阴囊延长来分析.
- 转基因大米 (Oryza sativa) 是通过表达Arabidopsis PHYB[G515E]和PHYB[G564E]来测试单植物的反应而开发的.
主要成果:
- 在热冲击下表达PHYB[G515E]的阿拉比多普西斯幼苗在高温下表现出显著缩短的阴茎,这表明温暖温度诱导的延伸减少.
- 这种减少的延长与减少的PIF4和auxin反应相关,表明信号通路发生了变化.
- 表达PHYB[G515E]和PHYB[G564E]的转基因大米在温暖的温度下表现出抑制的芽生长,在单种植物中表现出保存的功能.
结论:
- 用调节的暗回归率对phyB变体的短暂表达有效地操纵了热形态反应.
- 这种方法提供了一种光遗传工具,用于控制PIF4-auxin介导的增长,以应对温度.
- 这些发现表明,在农业中提高植物耐热性的潜在策略.
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