Giakountis Antonis, Coupland George
Max Planck Institute for Plant Breeding Research, Department of Plant Developmental Biology, Carl-von-Linné-Weg 10, D-50829 Cologne, Germany.
Curr Opin Plant Biol. 2008 Dec;11(6):687-94. doi: 10.1016/j.pbi.2008.10.003. Epub 2008 Nov 1.
Seasonal variability in environmental parameters such as day length regulates many aspects of plant development. The transition from vegetative growth to flowering in Arabidopsis is regulated by seasonal changes in day length through a genetically defined molecular cascade known as the photoperiod pathway. Recent advances were made in understanding the tissues in which different components of the photoperiod pathway act to regulate floral induction. These studies highlighted the key role of the FT protein, which is produced in the leaves in response to inductive day lengths and traffics through the phloem to initiate flowering at the shoot apex. Unveiling the cellular and molecular details of this systemic signaling process will be required for a complete understanding of flowering regulation and other photoperiodic processes.
诸如日照长度等环境参数的季节性变化调节着植物发育的许多方面。拟南芥从营养生长向开花的转变是由日照长度的季节性变化通过一个被称为光周期途径的基因定义分子级联反应来调节的。在理解光周期途径的不同组分发挥作用以调节花诱导的组织方面取得了最新进展。这些研究突出了FT蛋白的关键作用，该蛋白在叶片中产生以响应诱导性日照长度，并通过韧皮部运输以在茎尖启动开花。要全面理解开花调控和其他光周期过程，需要揭示这一系统信号传导过程的细胞和分子细节。
