The expression of D-cyclin genes defines distinct developmental zones in snapdragon apical meristems and is locally regulated by the cycloidea gene
The expression of D-cyclin genes defines distinct developmental zones in snapdragon apical meristems and is locally regulated by the cycloidea gene
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DOI：
10.1104/pp.122.4.1137
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发表时间：
2000-04-01
期刊：
影响因子：
7.4
通讯作者：
Doonan, JH
中科院分区：
文献类型：
--
作者：
Gaudin, V;Lunness, PA;Doonan, JH
金鱼草（Antirrhinum majus）顶端分生组织中有3个D-cyclin基因表达。细胞周期蛋白DI和D3 b基因在整个分生组织中表达，而细胞周期蛋白D3 a仅限于分生组织的外围区域，尤其是器官原基。在花发育过程中，细胞周期蛋白D3 B的表达：（a）在器官原基基部周围的细胞中进行局部调节，在侧部器官之间定义一个区域，该区域可能作为发育边界;（B）在花瓣折叠过程中在腹侧花瓣中进行局部调节;（c）在背侧雄蕊中被cycloidea基因特异性抑制。两个细胞周期蛋白D3基因的表达减少细胞周期活动的停止之前，判断组蛋白H4的表达。所有三个D-细胞周期蛋白基因的表达都受到调节植物生长的因子的调节，特别是蔗糖和细胞分裂素。这些观察结果可能为理解植物生长发育过程中细胞增殖的局部调控提供分子基础。
Three D-cyclin genes are expressed in the apical meristems of snapdragon (Antirrhinum majus). The cyclin DI and D3b genes are expressed throughout meristems, whereas cyclin D3a is restricted to the peripheral region of the meristem, especially the organ primordia. During floral development, cyclin D3b expression is: (a) locally modulated in the cells immediately surrounding the base of organ primordia, defining a zone between lateral organs that may act as a developmental boundary; (b) locally modulated in the ventral petals during petal folding; and (c) is specifically repressed in the dorsal stamen by the cycloidea gene. Expression of both cyclin D3 genes is reduced prior to the cessation of cell cycle activity, as judged by histone H4 expression. Expression of all three D-cyclin genes is modulated by factors that regulate plant growth, particularly sucrose and cytokinin. These observations may provide a molecular basis for understanding the local regulation of cell proliferation during plant growth and development.