ABA参与OSDSR3介导的调节大米中性耐受性
Xuping Lu1, Weifang Min2, Yangmengfei She2
1School of Agriculture, Ningxia University, Ningxia, Yinchuan, 750021, China; Technique College of Agriculture and Forestry, Longnan Normal University, Gansu, Longnan, 742500, China.
Journal of plant physiology
|July 24, 2025
概括
OsDSR3基因通过调节酸 (ABA) 信号来增强水压力耐受性. 过度表达OsDSR3会增加ABA水平和抗氧化活性,在性条件下改善植物生存.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 无生物性压力生理学生理学
背景情况:
- 性压力严重影响大米产量.
- 酸 (ABA) 和未知功能的域 (DUF) 蛋白质对于植物的应激耐受性至关重要.
- 之前,DUF966家族基因的OsDSR3被确定为米酸盐应激耐受性的积极调节者.
研究的目的:
- 调查OsDSR3在ABA信号通路中的作用,与大米中性压力耐受性有关.
- 阐明OsDSR3赋予抗性的分子机制.
主要方法:
- RNA测序和RT-qPCR用于分析基因表达.
- 在ABA治疗和性压力下对OsDSR3过度表达线和osdsr3突变物的表型分析.
- 测量ABA含量,活性氧物种 (ROS),抗氧化酶活性和透性物质.
- 酵母两杂交试验以确定蛋白质相互作用.
主要成果:
- OsDSR3过度表达线路对ABA和更高的内源ABA水平的敏感性增加,而osdsr3突变体表现出相反的反应.
- 外源性ABA应用在OsDSR3过度表达系中增强了性耐受性.
- 在性压力下,OsDSR3过度表达导致抗氧化酶活性增加,透调节器升高,ROS降低,并增强了ABA信号基因表达.
- OsDSR3与OsMT-3a相互作用,通过ABA途径促进ROS清理.
结论:
- OsDSR3通过与OsMT-3a相互作用并增强ABA信号传递,积极调节的性应激耐受性.
- OsDSR3介导的ABA通路改善了ROS清理,透调整和抗氧化防御,赋予了显著的抗性.
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