Wang Yue-Ping, Li Ying-Hui, Guan Rong-Xia, Liu Zhang-Xiong, Chen Xiong-Ting, Chang Ru-Zhen, Qiu Li-Juan
State Key Laboratory for Tropical Crop Biotechnology, Institute of Tropical Bioscience and Biotechnology Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China.
Yi Chuan. 2007 Apr;29(4):413-9. doi: 10.1360/yc-007-0413.
The formation of the root epidermis in Arabidopsis thaliana provides a simple model to study mechanisms underlying patterning in plants. Root hair increases the root surface area and effectively increases the root diameter, so root hair is thought to aid plants in nutrient uptake, anchorage and microbe interactions. The determination of root hair development has two types, lateral inhibition with feedback and position-dependent pattern of cell differentiation. The initiation and development of root hair in Arabidopsis provide a simple and efficacious model for the study of cell fate determination in plants. Molecular genetic studies identify a suite of putative transcription factors which regulate the epidermal cell pattern. The homeodomain protein GLABRA2 (GL2), R2R3 MYB-type transcription factor WEREWOLF (WER) and WD-repeat protein TRANSPARENTT TESTA GLABRA (TTG) are required for specification of non-hair cell type. The CAPRICE (CPC) and TRYPTICHON (TRY) are involved in specifying the hair cell fate.
拟南芥根表皮的形成提供了一个研究植物模式形成机制的简单模型。根毛增加了根表面积并有效增大了根直径，因此根毛被认为有助于植物吸收养分、固定植株及与微生物相互作用。根毛发育的决定有两种类型，即具有反馈的侧向抑制和细胞分化的位置依赖模式。拟南芥根毛的起始和发育为研究植物细胞命运决定提供了一个简单而有效的模型。分子遗传学研究鉴定出了一系列调控表皮细胞模式的假定转录因子。非毛细胞类型的特化需要同源结构域蛋白GLABRA2（GL2）、R2R3 MYB型转录因子WEREWOLF（WER）和WD重复蛋白TRANSPARENTT TESTA GLABRA（TTG）。CAPRICE（CPC）和TRYPTICHON（TRY）参与毛细胞命运的特化。
