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在米中介导热原料增强的爆破阻力

Jiehua Qiu¹, Xiuxiu Cao¹, Huanbin Shi¹

¹State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China.

Proceedings of the National Academy of Sciences of the United States of America

|September 3, 2025

概括

通过涉及miR44b.2,HsfA1和AOC1的途径,热应激增强了米粉的抗爆性,从而增加了酸 (JA) 的产生. 这一发现为培育适应气候变化的米品种提供了策略.

科学领域:

植物科学
分子生物学
适应气候变化

背景情况:

由于气候变化造成的极端高温事件影响了作物性.
热应激和抗米爆病之间的相互作用尚不清楚.

研究的目的:

确定调节大米中热原料增强的抗爆机制.
阐明热传感途径和特定基因在这个过程中的作用.

主要方法:

综合转录组概况和突变表型.
微RNA (miRNA) 动态分析,生物信息学和RNA下拉试验.
基因分析,基因编辑和激素治疗.

主要成果:

HsfA1 作为热阻爆电阻的正调节器.
对温度敏感的miR444b.2直接抑制了HsfA1的表达.
热应激降低了miR444b.2,提高了HsfA1的调节,并激活了雅斯蒙酸 (JA) 生合成的AOC1,从而增强了弹性.
HsfA1变种和编辑的线条显示了更好的抗爆性能.

结论:

miR444b.2-HsfA1-AOC1模块将热传感器与JA介导的阻力连接起来.
这一途径为设计具有生物和非生物应激耐受性的耐气候水提供了分子基础.

关键词:

气候变化疾病耐药性热冲击转录系数大米炸弹时间

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