Shimizu-Sato Sae, Tanaka Mina, Mori Hitoshi
Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan.
Plant Mol Biol. 2009 Mar;69(4):429-35. doi: 10.1007/s11103-008-9416-3. Epub 2008 Oct 30.
In many plant species, the intact main shoot apex grows predominantly and axillary bud outgrowth is inhibited. This phenomenon is called apical dominance, and has been analyzed for over 70 years. Decapitation of the shoot apex releases the axillary buds from their dormancy and they begin to grow out. Auxin derived from an intact shoot apex suppresses axillary bud outgrowth, whereas cytokinin induced by decapitation of the shoot apex stimulates axillary bud outgrowth. Here we describe the molecular mechanisms of the interactions between auxin and cytokinin in the control of shoot branching.
在许多植物物种中，完整的主茎顶端生长占主导地位，腋芽生长受到抑制。这种现象被称为顶端优势，对此已进行了70多年的分析。去除茎尖会解除腋芽的休眠，使其开始生长。来自完整茎尖的生长素会抑制腋芽生长，而茎尖去除后诱导产生的细胞分裂素则会刺激腋芽生长。在此，我们描述生长素和细胞分裂素在控制枝条分枝过程中相互作用的分子机制。
