The CUC1 and CUC2 genes promote carpel margin meristem formation during Arabidopsis gynoecium development.
The CUC1 and CUC2 genes promote carpel margin meristem formation during Arabidopsis gynoecium development.
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DOI：
10.3389/fpls.2014.00165
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发表时间：
2014
影响因子：
5.6
通讯作者：
Aida M
中科院分区：
文献类型：
--
作者：
Kamiuchi Y;Yamamoto K;Furutani M;Tasaka M;Aida M
心皮缘分生组织（Carpel margin meristems，CMMs）是拟南芥心皮原基融合后沿心皮原基边缘沿着分布的一对分生组织，是雌蕊群内部两个主要结构胚珠和隔片形成的关键。虽然一些调控因子参与拍摄分生组织的活动是已知的，这些雌蕊结构的形成所需的，它们在CMM发展的直接作用尚未得到解决。在这里，我们表明，杯形子叶基因CUC1和CUC2，这是必不可少的芽分生组织的启动，也需要形成和稳定的定位CMMs。在CMM形成的早期，CUC1和CUC2也是表达SHOOT MERISTEMLESS基因所必需的，SHOOT MERISTEMLESS基因是茎分生组织中干细胞维持的中心调节因子。此外，携带miR164抗性形式的CUC1和CUC2的植物导致额外的CMM活性和改变的定位。因此，我们的研究结果表明，这两个调节蛋白控制茎分生组织的活动也发挥了重要作用，通过控制分生组织的活动，在女性生殖器官的阐述。
Carpel margin meristems (CMMs), a pair of meristematic tissues present along the margins of two fused carpel primordia of Arabidopsis thaliana, are essential for the formation of ovules and the septum, two major internal structures of the gynoecium. Although a number of regulatory factors involved in shoot meristem activity are known to be required for the formation of these gynoecial structures, their direct roles in CMM development have yet to be addressed. Here we show that the CUP-SHAPED COTYLEDON genes CUC1 and CUC2, which are essential for shoot meristem initiation, are also required for formation and stable positioning of the CMMs. Early in CMM formation, CUC1 and CUC2 are also required for expression of the SHOOT MERISTEMLESS gene, a central regulator for stem cell maintenance in the shoot meristem. Moreover, plants carrying miR164-resistant forms of CUC1 and CUC2 resulted in extra CMM activity with altered positioning. Our results thus demonstrate that the two regulatory proteins controlling shoot meristem activity also play critical roles in elaboration of the female reproductive organ through the control of meristematic activity.
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