Auxin and strigolactones in shoot branching: intimately connected?
Auxin and strigolactones in shoot branching: intimately connected?
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DOI：
10.1042/bst0380717
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发表时间：
2010-04
影响因子：
3.9
通讯作者：
P. Stirnberg;Sally Ward;O. Leyser
中科院分区：
文献类型：
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作者：
P. Stirnberg;Sally Ward;O. Leyser
腋生分生组织在叶腋形成。在分生组织活动的初始阶段产生一个小的腋芽后，它们通常进入悬浮生长状态，从中它们可能被释放形成一个嫩枝。这种胚胎后生长的可塑性是植物的典型特征，使它们能够适应不断变化的环境条件。基因型相同的植物在不同的环境中生长时，其茎结构可能表现出完全不同的表型，其中一种只有初级花序和许多腋生分生组织，而另一种则表现出更高阶的分支。为了根据需要停止和恢复生长，植物必须协调其内在的发育计划与对环境线索的反应。据认为，来自环境的信息通过植物激素作为远距离信号被整合到整个植物中。在本综述中，我们主要关注生长素和独角甾内酯这两种激素是如何调节茎枝分支的。
Axillary meristems form in the axils of leaves. After an initial phase of meristematic activity during which a small axillary bud is produced, they often enter a state of suspended growth from which they may be released to form a shoot branch. This post-embryonic growth plasticity is typical of plants and allows them to adapt to changing environmental conditions. The shoot architecture of genotypically identical plants may display completely contrasting phenotypes when grown in distinct environmental niches, with one having only a primary inflorescence and many arrested axillary meristems and the other displaying higher orders of branches. In order to cease and resume growth as required, the plant must co-ordinate its intrinsic developmental programme with the responses to environmental cues. It is thought that information from the environment is integrated throughout the plant using plant hormones as long-distance signals. In the present review, we focus primarily on how two of these hormones, auxin and strigolactones, may be acting to regulate shoot branching.