细胞激素信号的扩散抑制产生内皮对称性和通道细胞
Tonni Grube Andersen1, Sadaf Naseer1, Robertas Ursache1
1Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland.
Nature
|March 15, 2018
概括
植物根通道细胞,对于营养吸收至关重要,由血管模式产生的. 这些细胞抵御亚体化,使其能够穿过内皮,并动态地适应营养的可用性.
科学领域:
- 植物生物学
- 根部的发展
- 细胞生物学
背景情况:
- 根内皮在血管植物中起着保护性屏障的作用,通过卡斯巴条和膜调节营养物质的运输.
- 通过细胞是内皮细胞的一个子集,已知可以促进穿越这一屏障,但它们的发育起源尚不清楚.
研究的目的:
- 阐明根内皮中通道细胞的发育起源和调节机制.
- 研究血管模式和激素信号在通道细胞形成中的作用.
- 了解通道细胞在营养吸收和运输中的功能意义.
主要方法:
- 分析根系结构和血管对称性.
- 研究细胞激素信号通路及其非细胞自主作用.
- 酸处理以研究耐分化.
- 对营养状况进行操纵,以观察通道细胞数量的动态变化.
- 在通道细胞和相邻的皮质细胞中分析载体基因表达.
主要成果:
- 通过细胞被确定为晚期发育的 меристематический模式,反映了血管的非辐射对称性.
- 根髓系统中的细胞因子信号抑制介导了花和杆相关的内皮细胞之间的区别.
- 杆关联的内皮细胞抵抗酸诱导的亚基化,形成通道细胞.
- 通过细胞数量由营养状况动态调节.
- 通过细胞表达运输体并影响邻近皮层细胞的运输体表达.
结论:
- 在根部发育过程中,通道细胞的形成与血管模式和细胞因素信号密切相关.
- 这些专门的细胞在内皮中感知和运输营养方面起着至关重要的作用.
- 通过细胞的动态调节突显了它们对环境信号的适应意义.
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