Institut des Sciences du Végétal, UPR2355 CNRS, 1 Avenue de la Terrasse, 91198 Gif sur Yvette, Cedex, France.
Cold Spring Harb Perspect Biol. 2010 May;2(5):a001446. doi: 10.1101/cshperspect.a001446. Epub 2010 Apr 7.
The phytohormone auxin is a major regulator of plant growth and development. Many aspects of these processes depend on the multiple controls exerted by auxin on cell division and cell expansion. The detailed mechanisms by which auxin controls these essential cellular responses are still poorly understood, despite recent progress in the identification of auxin receptors and components of auxin signaling pathways. The purpose of this review is to provide an overview of the present knowledge of the molecular mechanisms involved in the auxin control of cell division and cell expansion. In both cases, the involvement of at least two signaling pathways and of multiple targets of auxin action reflects the complexity of the subtle regulation of auxin-mediated cellular responses. In addition, it offers the necessary flexibility for generating differential responses within a given cell depending on its developmental context.
植物激素生长素是植物生长和发育的主要调节剂。这些过程的许多方面都依赖于生长素对细胞分裂和细胞扩张的多重控制。尽管最近在生长素受体和生长素信号通路成分的鉴定方面取得了进展，但生长素如何控制这些基本细胞反应的详细机制仍知之甚少。本文旨在概述生长素控制细胞分裂和细胞扩张的分子机制的现有知识。在这两种情况下，至少有两条信号通路的参与以及生长素作用的多个靶标反映了生长素介导的细胞反应的微妙调节的复杂性。此外，它为在给定细胞内根据其发育背景产生不同的反应提供了必要的灵活性。
