Nagy F, Kircher S, Schäfer E
Plant Biology Institute, Biological Research Center, Temesvari krt. 62., Szeged, H-6726, Hungary.
Semin Cell Dev Biol. 2000 Dec;11(6):505-10. doi: 10.1006/scdb.2000.0202.
Phytochromes in harmony with blue light photoreceptors play a major role in controlling plant growth and development from germination to seed maturation. Light absorption by phytochromes triggers a signaling cascade, phototransduction, which culminates in regulated gene expression. A major regulatory step at the cellular level, which affects specificities of light-induced physiological responses, seems to be the light-quality and light-quantity dependent nuclear import of the phytochromes themselves. The correlations found between the nuclear import of phytochromes (phyA and phyB) and various physiological responses regulated by these photoreceptors provides strong support for this hypothesis.
与蓝光光感受器协同作用的植物色素在控制植物从萌发到种子成熟的生长和发育过程中发挥着重要作用。植物色素吸收光会触发一个信号级联反应，即光转导，最终导致基因表达受到调控。在细胞水平上，一个影响光诱导生理反应特异性的主要调控步骤似乎是植物色素自身依赖光质和光量的核输入。在植物色素（phyA和phyB）的核输入与这些光感受器调节的各种生理反应之间发现的相关性为这一假说提供了有力支持。
