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Signal Transduction Pathway Regulating Dorsal-Ventral Axis Formation in Guard Cells

调节保卫细胞背腹轴形成的信号转导途径

基本信息

批准号：
21570046
负责人：
NAKAGAWA Tsuyoshi
金额：
$ 3万
依托单位：
Shimane University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2009
资助国家：
日本
起止时间：
2009 至 2011
项目状态：
已结题

项目摘要

Stomata are small pores exist on the surface of leaf in plants. Stomata work for intake of carbon dioxide necessary for photosynthesis from atmosphere. Stomata are important organs for plant growth and maintenance of environment. They are also interesting research targets in plant development. Stomata are formed by oppositely positioned two guard cells. The development of guard cell starts from protodermal cell. During development, guard cell becomes longer and bent outside to make pore. At this stage guard cell obtains dorsal-ventral polarity. According to this polarity, cell wall and cytoskeleton begin to distribute to make specific cell shape. In this study, we found a factor contributing polarity formation and analyzed its function. The polarity of guard cell was firstly established by asymmetric localization of a receptor like kinase on the cell membrane of guard cell. We also found that the specific localization pattern was caused by the kinase domain of the receptor like kinase.

气孔是存在于植物叶片表面的细小气孔。气孔从大气中吸收光合作用所需的二氧化碳。气孔是植物生长和维持环境的重要器官。它们也是植物发育中有趣的研究目标。气孔由两个相对的保卫细胞组成。保卫细胞的发育始于原胚层细胞。保卫细胞在发育过程中变长并向外弯曲形成气孔。在这个阶段，保卫细胞获得背腹极性。根据这种极性，细胞壁和细胞骨架开始分布，形成特定的细胞形状。在这项研究中，我们发现了一个因素的极性形成，并分析了它的功能。保卫细胞的极性首先是通过保卫细胞膜上的受体样激酶的不对称定位而建立的。我们还发现这种特异性的定位模式是由受体样激酶的激酶结构域引起的。