Control of cell division in the root epidermis of Arabidopsis thaliana
Control of cell division in the root epidermis of Arabidopsis thaliana
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DOI：
10.1006/dbio.1997.8813
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发表时间：
1998-02-15
影响因子：
2.7
通讯作者：
Schiefelbein, J
中科院分区：
文献类型：
--
作者：
Berger, F;Hung, CY;Schiefelbein, J
拟南芥根表皮的形成为研究植物形态形成机制提供了一个简单的模型。本文分析了根表皮细胞分裂方式与细胞命运的关系。克隆分析表明，根表皮发育过程中存在两种细胞类型，即成毛细胞和非成毛细胞，细胞分裂率不同，以成毛细胞分裂率最高。这一特性似乎与TTG有关，TTG控制着表皮细胞的命运规范。表皮细胞进行纵向分裂的能力参与了径向对称的控制，被证明是由TTG以细胞特异性的方式控制的。因此，对根分生组织表皮层细胞分裂速率和方向的控制似乎受到细胞命运规范机制的控制。(C) 1998学术出版社。
The formation of the root epidermis in Arabidopsis thaliana provides a simple model to study mechanisms underlying patterning in plants. In this paper we have analyzed the relationships between cell fate specification and the pattern of cell division that occur in the root epidermis. Using clonal analysis, the two cell types of the developing root epidermis, trichoblasts and atrichoblasts, were distinguished by different rates of cell division, highest in trichoblasts. This character appears to be dependent on TTG which controls epidermal cell fate specification. The ability of epidermal cells to undergo longitudinal divisions which are involved in the control of the radial symmetry was shown to be controlled in a cell-specific manner by TTG. The control of the rate and the orientation of cell division in the root meristem epidermal layer thus appear to be under the control of cell fate specification mechanisms. (C) 1998 Academic Press.