转录因子OsERF110调节大米花粉对重离子辐射反应的机制分析
Kai Sun1,2,3, Jinzhao Liu1,3, Jiameng Zhang1,3
1National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou 510642, China.
Biology
|September 27, 2025
概括
重离子辐射对米花粉产生影响,DNA双链断裂 (DSB) 快速修复,但复杂的损伤需要更长的时间. 研究人员确定了OsERF110作为调节大米的关键基因.
科学领域:
- 植物分子生物学 植物分子生物学
- 辐射生物学 辐射生物学
- 基因组学就是基因组学.
背景情况:
- 了解大米对重离子辐射的分子反应对于粮食安全至关重要.
- 重离子辐射可以诱导DNA损伤,影响植物发育和产量.
- 识别参与辐射反应的关键基因对于作物改善至关重要.
研究的目的:
- 分析大米花粉对重离子辐射反应的分子机制.
- 为了确定关键的基因和参与大米重离子辐射反应的调节网络.
- 为米突变育种和辐射生物学研究提供理论基础.
主要方法:
- 对照射的米花粉构建剂量生存率回归方程.
- 免疫光显微镜用于评估DNA双链断裂 (DSB) 修复动态.
- RNA测序 (RNA-seq) 用于在辐射后的不同时间点分析基因表达特征.
- 权重基因共同表达网络分析 (WGCNA) 和趋势分析以确定关键调节者.
- DNA亲和力净化测序 (DAP-seq) 用于识别转录因子结合部位.
- 整合DAP-seq和RNA-seq以识别目标基因.
主要成果:
- 辐射引起的DSB被快速修复,而复杂的损坏修复则取决于时间.
- 观察到基因表达模式的显著差异,确定了5556个差异表达基因 (DEG).
- DEGs主要涉及应激反应,蛋白质折叠和辐射后0-1小时的DNA修复.
- OsERF110被确定为一个关键的转录因子,调节对重离子辐射的反应.
- 确定了62个参与DNA修复,应激反应,氧化还原和代谢调节的OsERF110向基因,形成了一个调节网络.
结论:
- 在大米对重离子辐射的反应中,OsERF110起着至关重要的作用.
- 识别的OsERF110介导的监管网络为辐射反应机制提供了洞察力.
- 这项研究为米突变育种提供了新的目标,并推动了辐射生物学研究.
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