Development of several epidermal cell types can be specified by the same MYB-related plant transcription factor.
Development of several epidermal cell types can be specified by the same MYB-related plant transcription factor.
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发表时间：
1998-09
期刊：
影响因子：
4.6
通讯作者：
B. Glover;M. Pérez-Rodriguez;Cathie Martin
中科院分区：
文献类型：
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作者：
B. Glover;M. Pérez-Rodriguez;Cathie Martin
一种与myb相关的转录因子（MIXTA）控制锥形细胞形态的发育，该转录因子仅在Antirrhinum花瓣的内表皮中表达。该基因在转基因烟草植株中的表达导致叶片和花器官上多细胞毛体数量的增加，以及叶片上新的锥形细胞的产生。这些数据表明，锥形细胞和毛状体是通过共同的发育途径产生的。MIXTA表达的时间表明，细胞类型之间的选择取决于控制基因表达时细胞分裂的能力。因此，基因的重复及其与不同顺式调控区域的关联可能导致新的植物细胞类型的指定。
A MYB-related transcription factor (MIXTA) that controls development of conical cell form is expressed only in the inner epidermis of Antirrhinum petals. Expression of this gene throughout transgenic tobacco plants leads to excess numbers of multicellular trichomes on leaves and floral organs as well as the novel production of conical cells on leaves. These data indicate that conical cells and trichomes are produced by a common developmental pathway. The timing of MIXTA expression suggests that the choice between the cell types depends on the competence for cell division at the time at which the controlling gene is expressed. Duplication of genes and their association with different cis-regulatory regions may therefore result in the specification of novel plant cell types.