Concepts and terminology of apical dominance
Concepts and terminology of apical dominance
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DOI：
10.2307/2446149
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发表时间：
1997-08-01
影响因子：
3
通讯作者：
Cline, MG
中科院分区：
文献类型：
--
作者：
Cline, MG
顶端优势是指茎尖对侧芽生长的控制作用。不同的植物科学家使用的顶端优势的概念和术语有时会有所不同，这可能会导致重大的误解。顶端优势及其释放可分为4个发育阶段：（I）侧芽形成，（II）侧芽生长受到抑制，（III）去顶后顶端优势的释放，（IV）分支芽发育。特别强调的是区别阶段III，这是伴随着最初的芽生长在最初的几个小时的释放，并可能促进细胞分裂素和生长素抑制，和阶段IV，这是伴随着随后的芽生长发生后几天或几周断头，并可能促进生长素和赤霉素。不解释在第四阶段的基础上发生在第三阶段的条件和过程中测量的数据的重要性进行了讨论，以及分支度和内源生长素含量，分支突变体，在不同物种（包括拟南芥）的顶端优势的量化之间的相关性，和顶端控制树木。
Apical dominance is the control exerted by the shoot apex over lateral bud outgrowth. The concepts and terminology associated with apical dominance as used by various plant scientists sometimes differ, which may lead to significant misconceptions. Apical dominance and its release may be divided into four developmental stages: (I) lateral bud formation, (II) imposition of inhibition on lateral bud growth, (III) release of apical dominance following decapitation, and (IV) branch shoot development. Particular emphasis is given to discriminating between Stage III, which is accompanied by initial bud outgrowth during the first few hours of release and may be promoted by cytokinin and inhibited by auxin, and Stage IV, which is accompanied by subsequent bud outgrowth occurring days or weeks after decapitation and which may be promoted by auxin and gibberellin. The importance of not interpreting data measured in Stage IV on the basis of conditions and processes occurring in Stage III is discussed as well as the correlation between degree of branching and endogenous auxin content, branching mutants, the quantification of apical dominance in various species (including Arabidopsis), and apical control in trees.