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Photoperception and its mechanism of blue light receptor phototropin in plants

植物蓝光受体向光素的光感知及其机制

基本信息

批准号：
13139203
负责人：
WADA Masamitsu
金额：
$ 87.1万
依托单位：
National Institute for Basic Biology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2005
项目状态：
已结题

项目摘要

Plants use light for controlling their development and physiological phenomena. Blue light is as effective as red light and mediates phototropic response, chloroplast movement, stomata opening, leaf expansion, etc. These responses are mediated by one of the blue light photoreceptors, phototropins. Phototropins are consisted of serine/threonine protein kinase in C-terminus half and two LOV domains in N-terminus half. LOV domains bind flavin mononucleotides and absorb blue light. Our purpose in this grant was to study the phototropin signal trasduction pathways in chloroplast movement, stomata opening and phototropism and clarify the primary action of photoperception of phototropins and related photoreceptor, phytochrome 3. We studied on these subjects for four years from 2001 to March 2005 and found various new aspects on phototropins. We published 44 original papers including 4 Nature papers and 1 Science paper and 17 reviews on phototropin and phototropin related photoreceptors. Some of them are listed in the references attached.Although our research in this project finished at the end of March 2005, we held a two-days symposium on phototropins on November 2005 at Okazaki, hoping further advancement of phototropin studies in near future. In this symposium, two experts on this subject, Dr.John Christie from Glasgow and Dr.Kevin Gardner from Texas were invited and hot discussions were taken place for searching the ways to go for further advanced studies of phototropins and phototropin-mediated responses.

植物利用光来控制它们的发育和生理现象。蓝光与红光一样有效，介导向光反应、叶绿体运动、气孔开放、叶片扩展等。这些反应是由蓝光光感受器之一--向光蛋白介导的。趋光蛋白由C端的丝氨酸/苏氨酸蛋白激酶和N端的两个LOV结构域组成。LOV结构域结合黄素单核苷酸并吸收蓝光。本研究的目的是研究植物叶绿体运动、气孔开放和向光性中的光促素信号转导途径，阐明光促素及其相关光感受器光敏色素3在光感受中的主要作用。从2001年到2005年3月，我们对这些主题进行了四年的研究，发现了各种新的方面。发表了44篇原创论文，其中Nature论文4篇，Science论文1篇，综述17篇。虽然本课题的研究工作于2005年3月底结束，但我们于2005年11月在冈崎召开了为期两天的向光蛋白学术研讨会，希望在不久的将来能进一步推动向光蛋白的研究。本次研讨会邀请了来自格拉斯哥的John Christie博士和来自德克萨斯州的Kevin Gardner博士这两位专家，就趋光蛋白及其介导的反应的进一步研究进行了热烈的讨论。