一个移动的DELLA控制Medicago truncatula根皮层模式,以接纳状菌根真菌
Jianyong An1, Liu Fang2, Willem Cremers2
1Laboratory of Molecular Biology, Wageningen University & Research, Wageningen, the Netherlands. jyanwur@gmail.com.
Nature plants
|October 6, 2025
概括
德拉蛋白控制根细胞的身份,使得植物中有益的树枝状菌根 (AM) 真菌共生. 这一发现揭示了植物如何建立获取营养的根结构.
科学领域:
- 植物生物学 植物生物学
- 菌类学 菌类学是指菌类学.
- 遗传学 遗传学 是一个
背景情况:
- 植物的发展依赖于细胞分裂和特异化以适应.
- 树枝状菌根 (AM) 的共生对于植物克服营养限制至关重要.
- 根内皮层细胞中AM易受性的细胞基础仍然不清楚.
研究的目的:
- 在Medicago truncatula根内皮层细胞中确定AM易受性的因素.
- 阐明DELLA转录调节器在确定AM敏感细胞身份方面的作用.
- 研究DELLA蛋白在促进AM共生中的运动和功能.
主要方法:
- 在Medicago truncatula中进行遗传分析.
- 对DELLA转录调节器的研究.
- 蛋白质局部化研究以追踪MtDELLA1的运动.
主要成果:
- 德拉转录调节器以剂量依赖的方式控制AM敏感的内皮层细胞的数量.
- 德拉的功能与地面组织发育中的SHORT-ROOT转录因子融合.
- MtDELLA1蛋白从石头/内皮移动到皮质,促进形的形成.
结论:
- 德拉蛋白是AM共生所必需的根细胞身份的关键调节者.
- 移动DELLA和SHORT-ROOT蛋白质为共生建立根内皮层细胞身份.
- 这种机制为陆地植物中树状菌根共生提供了基本的基础.
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