Morphogenesis and patterning at the organ boundaries in the higher plant shoot apex u
Morphogenesis and patterning at the organ boundaries in the higher plant shoot apex u
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DOI：
10.1007/s11103-005-2760-7
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发表时间：
2006-04-01
影响因子：
5.1
通讯作者：
Tasaka, Masao
中科院分区：
文献类型：
--
作者：
Aida, Mitsuhiro;Tasaka, Masao
从茎尖分生组织形成的侧生器官原基产生了将原基与周围组织分开的边界。形态学和基因表达的研究表明，存在一组不同的细胞，定义在植物茎尖的边界。边界处的细胞通常显示出降低的生长活性，这导致相邻器官或组织的分离，并且该形态学边界与不同细胞身份的边界一致。这种形态发生和模式化事件及其空间协调是由许多边界特异性调控基因控制的。边界也可以作为新的分生组织如腋生分生组织产生的参考点。许多参与分生组织起始的基因在边界表达。本文综述了植物茎器官边界的细胞学特征以及控制这一独特区域不同方面的调控基因在植物发育中的作用。
Formation of lateral organ primordia from the shoot apical meristem creates boundaries that separate the primordium from surrounding tissue. Morphological and gene expression studies indicate the presence of a distinct set of cells that define the boundaries in the plant shoot apex. Cells at the boundary usually display reduced growth activity that results in separation of adjacent organs or tissues and this morphological boundary coincides with the border of different cell identities. Such morphogenetic and patterning events and their spatial coordination are controlled by a number of boundary-specific regulatory genes. The boundary may also act as a reference point for the generation of new meristems such as axillary meristems. Many of the genes involved in meristem initiation are expressed in the boundary. This review summarizes the cellular characters of the shoot organ boundary and the roles of regulatory genes that control different aspects of this unique region in plant development.