In seasonal flowering, plants need to monitor environmental variables. A combination of photoreceptors and the circadian clock initiate signals that regulate a network of genes in the leaf vascular system which communicates through mobile FLOWERING LOCUS T (FT) proteins, with the shoot apical meristem (SAM). At the SAM, a second network of genes is turned on specifically in certain cell domains, established by a second mobile protein, TERMINAL FLOWER 1 (TFL1), to ensure that flowering signals are translated into floral meristems at the flanks of the SAM but without compromising the nature of the SAM itself. Here, we provide an update on recent findings about the integration of light signals upstream of FT and tissue-specific events that occur in the SAM to balance flower production with SAM endurance.

在季节性开花时，植物需要监测环境变量。光感受器和生物钟的组合启动信号，调节叶血管系统中的基因网络，该网络通过移动的 FLOWERING LOCUS T (FT) 蛋白与茎尖分生组织 (SAM) 进行通信。在 SAM 中，特定细胞域中的第二个基因网络被打开，由第二个移动蛋白 TERMINAL FLOWER 1 (TFL1) 建立，以确保开花信号在 SAM 侧翼被翻译成花分生组织，但没有损害 SAM 本身的性质。在这里，我们提供了有关 FT 上游光信号与 SAM 中发生的组织特异性事件的整合以平衡花卉生产与 SAM 耐力的最新发现的更新。