在关键谷物作物中,bHLH转录因子PIL1调节粉合成
Yanjun Meng1, Jiaxing Cui1, Wenbo Zeng1
1National Engineering Research Center for Wheat, Henan Agricultural University, Zhengzhou, China.
Nature communications
|December 10, 2025
概括
研究人员确定了一种关键的转录因子TaPIL1-5D,它增强了谷物粉的合成和谷物作物如小麦和玉米的产量. 这一发现为提高作物生产率提供了新的策略.
科学领域:
- 植物分子生物学 植物分子生物学
- 农业科学 农业科学
- 遗传学和基因组学 遗传学和基因组学
背景情况:
- 粉是谷物谷物的主要成分,对全球热量摄入至关重要.
- 了解粉合成的遗传调节对于提高作物产量至关重要.
- 目前对关键作物中粉合成调节机制的知识仍然有限.
研究的目的:
- 识别和描述参与调节谷物粉合成的转录因子.
- 阐明在谷物作物中粉积累背后的分子机制.
- 探索这些因素在提高作物产量和粉含量方面的潜力.
主要方法:
- 在小麦中识别和表征转录因子TaPIL1-5D.
- 分析TaPIL1-5D对关键粉合成基因 (TaAGPS1a-7A,TaGBSSI-4A,TaBEIIb-2D) 的促进体结合活性.
- 在大米 (OsPIL11) 和玉米 (ZmPIL1) 中对同类PIL1基因的功能验证.
- 对转基因植物的谷物产量改善的评估.
- 研究TaPIL1-5B相互作用和TaBZR1.1.1.调节的研究.
主要成果:
- 鉴定出TaPIL1-5D是一种转录因子,它与关键粉合成基因的促进者结合.
- 同类的OsPIL11和ZmPIL1也分别在米和玉米中激活粉合成基因.
- 在实地试验中,TaPIL1-5D和ZmPIL1显著改善了谷物产量.
- 确定了TaPIL1-5B的9个等位基因,其中Hap1被TaBZR1.1.1.抑制.
- 塔皮尔1-5B与塔皮尔1-5D相互作用,增强转录激活.
结论:
- 这项研究确定了TaPIL1-5D及其同类作为谷物粉合成和产量的积极调节者.
- 一个涉及TaPIL1-5D,TaPIL1-5B和TaBZR1.1在粉合成中的新型调节网络被阐明.
- 这些发现为改善主要谷物作物的粉含量和产量提供了宝贵的遗传资源.
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