Light signals and flowering
Light signals and flowering
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DOI：
10.1093/jxb/erl071
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发表时间：
2006-01-01
影响因子：
6.9
通讯作者：
Thomas, Brian
中科院分区：
文献类型：
--
作者：
Thomas, Brian
长期以来的生理学研究表明，光通过质量、数量和持续时间这三个主要变量来调节开花。对模式植物拟南芥进行深入的分子遗传学和基因组学研究，使人们对其中的机制有了深入的了解，特别是在质量和光周期方面。对于光周期，光通过主要的光形态发生光感受器光光色素（phytochromes）和隐色素（cryptochromes）发挥作用，与CONSTANS （CO）的昼夜节律表达相互作用，导致移动花整合子开花位点T（开花位点T）的转录。ZEITLUPE （ZTL）和FLAVIN-BINDING、KELCH REPEAT、F-BOX （FKF1）分别作为辅助光感受器参与夹带和相互作用，增强了光明色素和隐色素在光周期中的作用。光质量通过光光色素B、D和E独立于昼夜节律系统调节FT。另一方面，光量效应仍未完全被理解，但可能与植物内部同化物分配和资源利用模式直接或间接相关。
Physiological studies over a long period have shown that light acts to regulate flowering through the three main variables of quality, quantity, and duration. Intensive molecular genetic and genomic studies with the model plant Arabidopsis have given considerable insight into the mechanisms involved, particularly with regard to quality and photoperiod. For photoperiodism light, acting through phytochromes and cryptochromes, the main photomorphogenetic photoreceptors, acts to entrain and interact with a circadian rhythm of CONSTANS (CO) expression leading to transcription of the mobile floral integrator, FLOWERING LOCUS T (FT). The action of phytochromes and cryptochromes in photoperiodism is augmented by ZEITLUPE (ZTL) and FLAVIN-BINDING, KELCH REPEAT, F-BOX (FKF1) acting as accessory photoreceptors on entrainment and interaction, respectively. Light quality acts independently of the circadian system through Phytochromes B, D, and E to regulate FT. Light quantity effects, on the other hand, are still incompletely understood but are likely to be linked either directly or indirectly to patterns of assimilate partitioning and resource utilization within the plant.