Sheng Lihong, Hu Xiaomei, Du Yujuan, Zhang Guifang, Huang Hai, Scheres Ben, Xu Lin
National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai 200032, China.
University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China.
Development. 2017 Sep 1;144(17):3126-3133. doi: 10.1242/dev.152132. Epub 2017 Jul 25.
Lateral roots (LRs), which originate from the growing root, and adventitious roots (ARs), which are formed from non-root organs, are the main contributors to the post-embryonic root system in However, our knowledge of how formation of the root system is altered in response to diverse inductive cues is limited. Here, we show that contributes to root system plasticity. When seedlings are grown vertically on medium, is not expressed in LR founder cells. During AR initiation, is expressed in AR founder cells and activates also functions in LR formation and is activated in that context by / and not by This indicates that divergent initial processes that lead to ARs and LRs may converge on a similar mechanism for primordium development. Furthermore, we demonstrated that when plants are grown in soil or upon wounding on medium, the primary root is able to produce both -mediated and non--mediated roots. The discovery of -mediated root-derived roots reveals a previously uncharacterized pathway that confers plasticity during the generation of root system architecture in response to different inductive cues.
侧根（LRs）起源于正在生长的根，不定根（ARs）由非根器官形成，它们是植物胚胎后根系的主要组成部分。然而，我们对于根系形成如何响应各种诱导信号而发生改变的了解有限。在这里，我们表明[具体内容]有助于根系可塑性。当幼苗在培养基上垂直生长时，[具体内容]在侧根起始细胞中不表达。在不定根起始过程中，[具体内容]在不定根起始细胞中表达并激活[具体内容]。[具体内容]也在侧根形成中起作用，并在这种情况下被[具体内容]/而非[具体内容]激活。这表明导致不定根和侧根的不同起始过程可能在原基发育的类似机制上汇聚。此外，我们证明当植物在土壤中生长或在培养基上受伤时，主根能够产生[具体内容]介导和非[具体内容]介导的根。[具体内容]介导的根衍生根的发现揭示了一条以前未被表征的途径，该途径在响应不同诱导信号时赋予根系结构生成过程中的可塑性。
