OsMYB58 通过调节酸盐平衡来负面调节植物生长和发育
Dongwon Baek1, Soyeon Hong2, Hye Jeong Kim3
1Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 52828, Republic of Korea.
International journal of molecular sciences
|February 24, 2024
概括
酸盐饥饿限制了作物生长. OsMYB58基因通过增强microRNA表达来负面调节米中的酸盐信号,影响根部发育和低酸盐条件下的整体植物生长.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物生理学 植物生理学
- 农业科学 农业科学
背景情况:
- 酸盐 (Pi) 缺乏是农作物生产率的一个主要限制.
- R2R3-MYB转录因子参与压力反应,但它们在Pi恒温中的作用尚不清楚.
- 了解Pi饥饿信号对于提高作物弹性至关重要.
研究的目的:
- 确定和描述R2R3-MYB转录因子OsMYB58在米Pi饥饿信号和恒温中的作用.
- 研究OsMYB58在低酸盐条件下的调节机制.
- 为了阐明OsMYB58,微RNA和酸盐输送基因表达之间的关系.
主要方法:
- 在各种营养缺乏的情况下对OsMYB58的基因表达分析.
- 在Arabidopsis thaliana和大米中过度表达OsMYB58,以评估表型效应.
- 分析根部发育,微RNA表达 (OsmiR399a,OsmiR399j) 和目标基因表达 (OsPHO2).
- 转录活动测试以确定OsMYB58作为抑制剂的功能.
主要成果:
- OsMYB58表达显著受到Pi饥饿的诱导.
- 过度表达OsMYB58抑制了植物生长,并损害了在Pi缺乏的情况下的根部发育.
- OsMYB58的过度表达减少了OsmiR399的表达,并增加了OsPHO2的表达.
- OsMYB58作为一个转录抑制剂.
结论:
- OsMYB58负面调节了中的Pi饥饿信号.
- OsMYB58-OsmiR399-OsPHO2通路是Pi恒温的关键组成部分.
- OsMYB58在抑制microRNA表达中的作用影响植物适应低酸盐环境.
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