低等植物蓝光受体信号传导研究  

Blue Light Signaling in Mosses

作　　者：孙铭明[1] 靳硕[1] 刘祥林[1] 何奕昆[1] 

机构地区：[1]首都师范大学生命科学学院

出　　处：《遗传》2006年第6期754-760,共7页Hereditas（Beijing)

基　　金：北京市自然科学基金重点资助项目(编号:5021001;KZ20061002817)~~

摘　　要：拟南芥含有5个已分离的蓝光受体和至少1个未鉴定的蓝光/紫外光-A受体。隐花色素(CRY1、CRY2和CRY3)调节植物的形态建成、开花和生物节律性,而向光素(PHOT1和PHOT2)调节植物的向光性、叶绿体运动和气孔开放。黄素可以吸收蓝光和紫外光-A,是CRY和PHOT蓝光受体的生色团。对这些光受体的结构和作用模式已了解很多。苔藓植物小立碗藓中含有2个已分离的隐花色素(CRY1a和CRY1b),负责调节侧枝形成和调控生长素反应;有4个向光素(PHOTA1,PHOTA2,PHOTB1,PHOTB2)调节叶绿体的运动。苔藓细胞内蓝光/紫外光-A引发的信号转导有Ca2+参与。Arabidopsis thaliana contains five identified blue light photoreceptors and at least one unidentified blue/UV- A light photoreceptor. Cryptochromes （CRY1 and CRY2） modulate photomorphological processes, flowering time, and circadian timing while phototrophins （PHOT1 and PHOT2） modulate phototropism, chloroplast movement, and stomatal opening. Flavins are the chromophores and absorb in the blue and UV-A range. Considerable information is known about the structures and functional modes of these photoreceptors. The moss Physcornitrella patens contains two iden- tified cryptochromes （CRY1a and CRYlb） which modulate side branch formation and auxin metabolism. Blue light-induced chloroplast movement was mediated by four phototropins. Transduction of the blue/UV-A stimulus does involve calcium signaling in moss cells.

关 键 词：蓝光/紫外光-A光受体 隐花色素 向光素 苔藓植物 

分 类 号：Q942[生物学—植物学]