Department of Botany, University of Wisconsin, Birge Hall, 430 Lincoln Drive, Madison, WI 53706, United States.
Curr Opin Plant Biol. 2009 Dec;12(6):766-72. doi: 10.1016/j.pbi.2009.08.002. Epub 2009 Sep 25.
Because of their sessile lifestyle, the areas which plants can access to forage for resources are confined to those which can be explored by growth. High sensitivity to environmental conditions coupled to the appropriate readjustment of growth and developmental responses are thus critical to plant survival. In this review, we focus on how roots perceive physical cues such as soil water status and mechanical properties and translate them into physiological signals to redirect organ growth and modulate root system architecture. Because the precise molecular identity of most of the sensors used by the root to sample the soil environment remain to be determined, the mechanisms underlying similar processes in microbes are providing important models for how these receptor systems may be functioning in plants.
由于其固着的生活方式，植物可以获取资源的区域仅限于可以通过生长来探索的区域。因此，对环境条件的高度敏感以及对生长和发育反应的适当调整对于植物的生存至关重要。在这篇综述中，我们重点介绍了根如何感知物理线索，例如土壤水分状况和机械特性，并将其转化为生理信号，以重新引导器官生长并调节根系结构。由于根用来采样土壤环境的大多数传感器的确切分子身份仍有待确定，因此微生物中类似过程的机制为这些受体系统在植物中可能的功能提供了重要模型。
