Science. 1986 May 30;232(4754):1106-12. doi: 10.1126/science.232.4754.1106.
Light plays a pivotal role in the development of plants. The photoregulation of plant genes involves recognition of light quality and quantity by phytochrome and other light receptors. Two gene families, rbcS and Cab, which code for abundant proteins active in photosynthesis, the small subunit of ribulose bisphosphate carboxylase and the chlorophyll a/b binding protein, show a 20-to 50-fold increase in transcript abundance in the light. Analyses in calli and transgenic plants of deletions of the rbcS gene and of chimeric constructions has allowed localization of two regions involved in light-induced transcription. One element is confined to a 33-base pair region surrounding the TATA box. In addition, an enhancer-like element contained within a 240-base pair fragment can confer phytochrome-induced transcription and organ specificity on nonregulated promoters.
光在植物的发育过程中起着关键作用。植物基因的光调节涉及到植物色素和其他光受体对光质和光量的识别。两个基因家族， rbcS 和 Cab，它们编码光合作用中大量的活性蛋白，核酮糖二磷酸羧化酶的大亚基和叶绿素 a/b 结合蛋白，在光下转录物的丰度增加了 20 到 50 倍。对 rbcS 基因缺失的愈伤组织和嵌合构建体的分析，使参与光诱导转录的两个区域得以定位。一个元件局限于围绕 TATA 盒的 33 个碱基对的区域。此外，一个包含在 240 个碱基对片段内的增强子样元件可以赋予非调节启动子对光诱导转录和器官特异性。
