科学问题：How cells acquire their identities and grow coordinately within a tissue is a fundamental question to understand plant development. 

背景1-SAM：In angiosperms, the shoot apical meristem (SAM) is a multicellular tissue containing astem cell niche, which activity allows for a dynamic equilibrium between maintenance of stem cells and production of differentiated cells that are incorporated in new aerial tissues and lateral organs produced in the SAM. 

背景2-植物激素：Plant hormones are small-molecule signals controlling many aspects of plant development and physiology. Several hormones are essential regulators of SAM activities. 

综述内容：This review highlights current advances that are starting to decipher the complex mechanisms underlying the hormonal control of cell identity and growth in the SAM.

 摘 要 

细胞如何获得它们的特性并在组织内协调生长是理解植物发育的一个基本问题。在被子植物中，茎尖分生组织（SAM）是一种多细胞组织，包含一个干细胞微环境（stem cell niche），其活性作用于干细胞维持和产生分化细胞之间的动态平衡，而这些由SAM分化出来的细胞会被整合到植物新的地上组织和侧生器官中。植物激素是一种小的分子信号，控制着植物发育和生理的许多方面。一些激素对于SAM活性的调节是非常重要的。本文综述了SAM中植物激素控制细胞特性和生长的复杂机制相关研究进展。