生长素调控植物株型形成的研究进展

Advances in Understanding the Roles of Auxin Involved in Modulating Plant Architecture

高等植物通过调节顶端分生组织和侧生分生组织的活性建立地上株型系统,分生组织的活性受环境信号、发育阶段和遗传因素的综合调控,植物激素参与这些信号的整合。顶端优势是植物分枝调控的核心问题,而生长素对顶端优势的形成和维持发挥关键作用。本文综述了近几年与植物地上部分株型形成相关的生长素合成代谢、极性运输及信号转导领域的研究进展,并提出了展望。

Plants modulate their shoot architecture by regulating activities of the shoot apical meristem and axillary meristems. Meristem activities are regulated by a network of environmental information, developmental stage and genetic makeup of the plant. The fate of signal integration, to a large extent, depends on the action of plant hormones. Auxin plays an essential role in the establishment and maintenance of the apical dominance, which is a central issue in regulating shoot branching. This review focuses on recent advances in the study of auxin biosynthesis, metabolism, polar transport, and signaling pathway, as well as their involvements in the control of the architecture of aerial parts. Prospects in the field are also briefly discussed.