【摘要】 植物具备一套复杂的由两种蓝光受体和多种信号转导下游组分组成的蓝光感应系统,通过感受光照强度、光的方向和光周期,调节自身对蓝光的应答.蓝光反应的有效波长是蓝光和近紫外光(320～400nm),故蓝光受体也叫蓝光/近紫外光受体.CRY2(Cryptochromes,CRY)是一个核蛋白,在转录水平受蓝光的调节,它的作用是增加拟南芥对蓝光的敏感性.植物蓝光调节的反应主要有向光性、抑制幼茎伸长、叶绿体迁移、刺激气孔张开和调节基因表达等.对植物蓝光反应突变体分子生物学研究进展进行了综述,对蓝光受体及信号转导下游组分在植物发育中的作用及蓝光诱发植物作出反应的分子机制进行了探讨.更多还原

【Abstract】 To monitor the quantity,direction,and duration of blue light signals,higher plants rely on a sophisticated photosensory system consisting of two blue-light receptors:cryptochrome and phototropin and various signal transduction factors.Blue-ray wavelengths are an effective response to Blue-ray and near-UV (320 ～400 nm).Therefore,Blue-ray receptor,were also known as a Blue-ray /near ultraviolet light receptor.Cryptochromes 2 (CRY2) encodes a nuclear protein,Blue-ray at the transcriptional level to regulate the protein and its role is to increase the sensitivity of Arabidopsis thaliana on the Blue-ray.Blue light regulate a wide range of responses in plants,including phototropism,chloroplast migration and stomatal opening.The molecular biology progress of a plant blue light response mutants are summarized,and the Blue-ray receptor and downstream signal transduction components in the role of plant development and response to blue light-induced molecular mechanisms are discussed.更多还原