Sato Yoshikatsu, Kadota Akeo, Wada Masamitsu
Department of Biological Sciences, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan.
J Plant Res. 2003 Feb;116(1):1-5. doi: 10.1007/s10265-002-0073-3. Epub 2003 Jan 11.
The study of chloroplast photorelocation movement is progressing rapidly now that mutants for chloroplast movement have become available in Arabidopsis thaliana. However, mechanistic approaches in cell biology still stand to elucidate the mechanisms and regulations of such movement. The fern Adiantum capillus-veneris and the moss Physcomitrella patens are particularly suitable materials for analyzing the kinetics of intracellular chloroplast movement. In these plants, chloroplast movement is induced by red light as well as blue light, mediated by phytochrome and blue light receptor, respectively. In this paper, we review the unique force-generating system for chloroplast motility in P. patens. In addition to light-induced chloroplast movement, we also summarize mechanically induced chloroplast movement in these plants and the motility systems involved. Finally, the different dependency of mechano- and photo-relocation movement on external Ca(2+) is discussed.
由于拟南芥中已获得叶绿体运动的突变体，叶绿体的光定位运动研究目前进展迅速。然而，细胞生物学中的机制研究方法仍有待阐明这种运动的机制和调控。蕨类植物铁线蕨和苔藓小立碗藓是分析细胞内叶绿体运动动力学的特别合适的材料。在这些植物中，叶绿体运动分别由红光和蓝光诱导，分别由光敏色素和蓝光受体介导。在本文中，我们综述了小立碗藓中叶绿体运动独特的力产生系统。除了光诱导的叶绿体运动外，我们还总结了这些植物中机械诱导的叶绿体运动以及所涉及的运动系统。最后，讨论了机械和光重新定位运动对外部Ca(2+)的不同依赖性。
