对多种非生物应激的耐受性由相互作用的CNGC蛋白调节米中Ca2+流入和口腔运动的介导
Lilin Luo1, Yongmei Cui1,2, Nana Ouyang1
1State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, College of Agriculture, Nanjing Agricultural University, Nanjing, 210095, China.
Journal of integrative plant biology
|January 8, 2025
概括
三种大米循环核酸通道 (CNGC) 蛋白,OsCNGC14,OsCNGC15,和OsCNGC16,调节离子流入和口腔运动,增强对多种非生物应激的耐受性,如热,冷却和干旱.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 压力生理学 压力生理学
背景情况:
- 循环核酸通道 (CNGC) 蛋白质与植物对生物/无生物应激和口腔调节的反应有关.
- 单个CNGC成员在调解多重压力反应中的具体作用在很大程度上仍然没有特征.
研究的目的:
- 为了研究三种大米CNGC基因 (OsCNGC14,OsCNGC15,OsCNGC16) 在应对多种非生物性压力时的功能.
- 确定这些基因在压力条件下是否调节口腔运动和离子流入.
主要方法:
- 在大米中对OsCNGC14,OsCNGC15和OsCNGC16的功能丧失突变物和过度表达线的表征.
- 评估了离子 (Ca2+) 流入,口腔关闭率和耐热,冷却和干旱压力的耐受性.
- 在OsCNGC成员中研究了蛋白质与蛋白质的相互作用.
主要成果:
- 功能丧失的突变者表现出减少的Ca2+流入,更慢的口腔关闭,以及对热,冷却和干旱的耐受性降低.
- 过度表达OsCNGC16增强了口腔关闭和应力耐受.
- OsCNGC14,OsCNGC15和OsCNGC16蛋白质在物理上相互作用,形成异质寡合体.
结论:
- OsCNGC14,OsCNGC15和OsCNGC16在调节口腔运动和流量方面发挥着至关重要的作用,从而使大米对多种非生物应激产生耐受性.
- 这些发现表明,非生物应激耐受性的保存机制涉及CNGC介导的信号传递和口腔调节.
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