Guan Chunmei, Jiao Yuling
State Key Laboratory of Plant Genomics and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing, 100101 China.
University of Chinese Academy of Sciences, Beijing, 100049 China.
aBIOTECH. 2020 May 27;1(3):178-184. doi: 10.1007/s42994-020-00021-2. eCollection 2020 Jul.
Tissues and organs within a living organism are coordinated, but the underlying mechanisms are not well understood. The shoot apical meristem (SAM) continually produces lateral organs, such as leaves, from its peripheral zone. Because of their close proximity, SAM and lateral organs interact during plant development. Existing lateral organs influence the positions of newly formed organs to determine the phyllotaxis. The SAM not only produces lateral organs, but also influences their morphogenesis. In particular, the SAM promotes leaf polarity determination and leaf blade formation. Furthermore, lateral organs help the SAM to maintain homeostasis by restricting stem cell activity. Recent advances have started to elucidate how SAM and lateral organs patterning and growth are coordinated in the shoot apex. In this review, we discuss recent findings on the interaction between SAM and lateral organs during plant development. In particular, polar auxin transport appears to be a commonly used coordination mechanism.
生物体中的组织和器官是相互协调的，但其潜在机制尚未得到充分理解。茎尖分生组织（SAM）从其外周区持续产生侧生器官，如叶子。由于它们距离很近，SAM和侧生器官在植物发育过程中相互作用。现有的侧生器官影响新形成器官的位置以确定叶序。SAM不仅产生侧生器官，还影响它们的形态发生。特别是，SAM促进叶片极性的确定和叶片的形成。此外，侧生器官通过限制干细胞活性来帮助SAM维持体内平衡。最近的进展已开始阐明SAM和侧生器官的模式形成及生长在茎尖是如何协调的。在这篇综述中，我们讨论了植物发育过程中SAM和侧生器官之间相互作用的最新发现。特别是，极性生长素运输似乎是一种常用的协调机制。
