Fundación Instituto Leloir, IIBBA-CONICET, Avenida Patricias Argentinas 435, Buenos Aires, 1405, Argentina.
Fundación Instituto Leloir, IIBBA-CONICET, Avenida Patricias Argentinas 435, Buenos Aires, 1405, Argentina.
Curr Opin Plant Biol. 2021 Oct;63:102049. doi: 10.1016/j.pbi.2021.102049. Epub 2021 May 8.
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.
在季节性开花中，植物需要监测环境变量。光受体和生物钟的组合启动信号，调节叶片血管系统中的基因网络，该网络通过移动的开花位点 T (FT) 蛋白与茎尖分生组织 (SAM) 进行通讯。在 SAM 中，第二个基因网络在特定的细胞区域被开启，这是由第二个移动蛋白 TERMINAL FLOWER 1 (TFL1) 建立的，以确保开花信号在 SAM 的侧翼转化为花分生组织，但不损害 SAM 本身的性质。在这里，我们提供了关于 FT 上游光信号的整合以及在 SAM 中发生的组织特异性事件的最新发现的更新，以平衡花的产生和 SAM 的耐力。
