一个AP2/ERF转录因子赋予了大米的冷却耐受性
Liang Xu1, Lijia Yang1, Aipeng Li1
1State Key Laboratory of Rice Biology and Breeding, Zhejiang Provincial Key Laboratory of Crop Genetic Resources, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China.
Science advances
|August 28, 2024
概括
研究人员确定了OsERF52作为大米寒冷耐受性的关键因素. 增强OsERF52可以提高耐冷性,而不会影响产量,为培育耐寒米品种提供了宝贵的工具.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 农业科学 农业科学
背景情况:
- 寒冷压力对大米产量和生长有重大影响.
- 了解冷却耐受性机制对于开发弹性大米品种至关重要.
研究的目的:
- 确定大米冷却耐受性的关键调节者.
- 阐明大米冷反应的分子机制.
- 探索OsERF52作为改善耐寒米的目标.
主要方法:
- 鉴定了OsERF52,一个APETALA2/乙烯响应因子 (AP2/ERF) 转录因子.
- 研究了OsERF52在调节C-重复结合因子 (CBF) 基因中的作用.
- 通过奥斯莫斯应激/ABA激活蛋白激酶9分析了OsERF52的酸化.
- 研究了OsERF52,理想植物架构1和OsbHLH002/OsICE1.1之间的相互作用.
- 使用基调编辑来修改米植物中的OsERF52.
主要成果:
- OsERF52 作为大米寒冷应激反应的积极调节剂.
- OsERF52直接控制大米CBF基因的表达.
- OsMAPK9的酸化增强了OsERF52的稳定性及其与其他转录因子的相互作用,激活OsCBFs.
- 用修改后的OsERF52进行基调编辑的米米显示出更好的抗冷性,而不会影响产量.
结论:
- 一个涉及OsERF52,OsMAPK9,IPA1和OsICE1的调节途径协调了大米冷却反应.
- OsERF52是启动大米耐寒性的关键组成部分.
- OsERF52为开发高产,耐寒的米品种提供了有前途的遗传资源.
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