不同光敏色素分子的特异感光性

简要综述两种光敏色素（ＰｈｙＡ、ＰｈｙＢ） 的分子特性、感光性及作用模式等方面的研究进展。光敏色素是一种调节植物中许多光反应的色素蛋白复合体。不同光敏色素分子具有特异的感光性。ＰｈｙＡ负责‘甚低辐照反应’和远红光‘高辐照反应’； 而ＰｈｙＢ则调节‘低辐照反应’及红光‘高辐照反应’。另外， 讨论了ＰｈｙＡ和ＰｈｙＢ在光周期感受中的作用。

Specific photoperception of different phytochrome molecules

Recent advances in elucidating the properties, photoperception and action models of two phytochrome molecules (PhyA and PhyB) were briefly described Phytochrome is a chromoprotein that regulates many light responses in plants Individual phytochromes have specific photoperception functions PhyA is responsible for a ‘very low fluence response’and far-red-light‘high irradiance response’, whereas PhyB is necessary for a‘low fluence response’and red-light ‘high irradiance response’ The roles of PhyA and PhyB in photoperiodic photoperception were discussed, too