Department of Biology, Oberlin College, Oberlin, OH 44074, USA.
J Exp Bot. 2013 Jun;64(9):2609-17. doi: 10.1093/jxb/ert155.
The locations in which lateral roots arise are determined by local peaks of auxin response driven by whole-plant physiology. The architecture of a plant root system adapts it to the conditions in which it grows: large shoot systems demand large root systems, and growth in soils that have low or patchy nutrient distributions is often best managed by non-uniform patterns of root branching. It is not surprising then that the regulation of lateral root spacing is responsive to a wide array of stimuli. Molecular genetic studies have outlined a mechanism by which multiple modules of auxin response in specific cell types drive lateral root initiation. These peaks of auxin responsiveness are functionally controlled by the growth of the plant and the changing environmental conditions it experiences. Thus, the process of lateral root initiation, which depends on strong local auxin response, is globally mediated.
侧根发生的位置是由整株植物生理学驱动的局部生长素响应峰所决定的。植物根系的结构使其适应生长环境：大的茎叶系统需要大的根系，而在养分分布低或不均匀的土壤中生长，通常最好通过非均匀的根系分支模式来管理。因此，侧根间距的调节对各种刺激做出反应也就不足为奇了。分子遗传学研究概述了一种机制，即特定细胞类型中多个生长素响应模块驱动侧根起始。这些生长素响应峰的功能受到植物生长和其经历的环境条件变化的控制。因此，依赖于强烈局部生长素响应的侧根起始过程是全局调节的。
