单细胞和组织转录组揭示了调节草叶原生植物静脉启动和发育的因素
Juan Yi1,2, Yonghe Chen1,2, Shilong Tian1
1Key Laboratory of Plant Carbon Capture, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China.
The Plant cell
|February 22, 2026
概括
这项研究揭示了auxin和SHORT-ROOT1 (SHR1) 如何相互作用,以控制玉米和大米的叶脉模式. 研究人员确定了关键的基因,并开发了一种系统来操纵大米的静脉形成,进步了我们对草叶发育的理解.
科学领域:
- 植物生物学 植物生物学
- 发育遗传学的发展遗传学.
- 分子植物科学 分子植物科学
背景情况:
- 叶子变异模式对植物功能至关重要,但玉米 (C4) 和大米 (C3) 等草的潜在遗传机制尚未完全理解.
- 玉米的叶子表现出比大米更密集的花纹,这表明了不同的发育调节.
研究的目的:
- 系统地研究玉米和大米叶原始的静脉形成的发育模式.
- 识别调节静脉启动和分化的关键基因和分子通路.
- 建立一个用于操纵大米静脉形成的实验系统.
主要方法:
- 玉米叶原始的单核转录学图表.
- 伪时间轨迹分析以确定细胞类型特定的标记基因.
- 在大米叶中对基因表达 (ZmSHR1,OsGH3.8,OsAUX1) 和auxin水平的实验性操纵.
主要成果:
- 在玉米中鉴定出不同的地面组织和前细胞群.
- 发现了参与静脉发育的新型标记基因,包括ZmEREB114,ZmAIC3,ZmEREB161和ZmAAS2.
- 证明ZmSHR1抑制了与素相关的基因 (OsGH3.8,OsAUX1),而素促进了它们,揭示了对抗性相互作用.
结论:
- 为草叶早期发育提供单细胞分辨率数据.
- 提供了一种用于操纵大米静脉启动的新型实验系统.
- 提出了一个模型,其中SHR1功能和辅酶信号相互作用来调节玉米和大米的叶脉模式.
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