Kevei Eva, Nagy Ferenc
Institute of Plant Biology, Biological Research Centre, Temesvári krt 62., H-6726 Szeged, Hungary Institute of Plant Biology, Agricultural Biotechnological Centre, Szent-Györgyi A. 4, H-2101 Gödöllõ, Hungary.
Physiol Plant. 2003 Mar;117(3):305-313. doi: 10.1034/j.1399-3054.2003.00049.x.
Plants can sense the changes in the environmental light conditions with highly specialized photoreceptors. Phytochromes are sensitive to red and far-red light and have a dual role in the life of plants. These photoreceptors play an important role in plant growth and development from germination to seed maturation and they are also involved in synchronizing the circadian clock with light/dark cycles. Biochemical, cell biological and genetic studies have been carried out to elucidate the molecular mechanism by which phytochromes transduce light signals. A major step in this process seems to be the light-dependent nuclear import of phytochromes. In the nuclei phytochromes interact with transcription factors and regulate the expression of numerous genes, resulting in complex physiological and developmental responses to light. This review focuses on the recently obtained results leading to the identification of some factors and processes involved in phytochrome signalling.
植物能够通过高度专业化的光感受器感知环境光条件的变化。光敏色素对红光和远红光敏感，在植物的生命过程中具有双重作用。这些光感受器在植物从萌发到种子成熟的生长发育过程中发挥着重要作用，它们还参与使生物钟与光/暗周期同步。人们已经开展了生物化学、细胞生物学和遗传学研究，以阐明光敏色素转导光信号的分子机制。这一过程中的一个主要步骤似乎是光敏色素的光依赖性核输入。在细胞核中，光敏色素与转录因子相互作用并调节众多基因的表达，从而导致对光的复杂生理和发育反应。本综述重点关注最近获得的一些结果，这些结果导致了对光敏色素信号传导中涉及的一些因素和过程的识别。
