The quest for florigen: a review of recent progress
The quest for florigen: a review of recent progress
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DOI：
10.1093/jxb/erl095
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发表时间：
2006-01-01
影响因子：
6.9
通讯作者：
Coupland, George
中科院分区：
文献类型：
--
作者：
Corbesier, Laurent;Coupland, George
开花的光周期诱导是一个系统的过程，需要花刺激物从叶片转移到茎尖分生组织。响应于这种刺激，顶端分生组织停止产生叶以启动花的发育;这种形态发生的转变涉及到启动的原基的身份和叶序的变化。花转变的生理学研究已经导致了几个假定的花信号，如蔗糖，细胞分裂素，赤霉素，和减少的N-化合物，被易位在韧皮部汁液从叶到茎顶端分生组织的鉴定。另一方面，最近在拟南芥中开发的遗传方法允许发现许多控制开花时间的基因。这些基因在四个促进途径中以“级联”方式起作用，即“光合作用”、"光合作用“、"春化作用”和“赤霉素”途径，它们都会聚在“整合者”基因CO 1过表达的提供基因（SOCII）和花座T（FT）上。最近，一些研究强调了FT的产物作为成花刺激物或“成花素”的组分的作用。这些最新的进展和FT的拟议的行动模式进行了讨论。
The photoperiodic induction of flowering is a systemic process requiring translocation of a floral stimulus from the leaves to the shoot apical meristem. In response to this stimulus, the apical meristem stops producing leaves to initiate floral development; this switch in morphogenesis involves a change in the identity of the primordia initiated and in phyllotaxis. The physiological study of the floral transition has led to the identification of several putative floral signals such as sucrose, cytokinins, gibberellins, and reduced N-compounds that are translocated in the phloem sap from leaves to the shoot apical meristem. On the other hand, the genetic approach developed more recently in Arabidopsis thaliana allowed the discovery of many genes that control flowering time. These genes function in 'cascades' within four promotive pathways, the 'photoperiodic', 'autonomous',,vernalization', and 'gibberellin' pathways, which all converge on the 'integrator' genes SUPPRESSOR OF OVEREXPRESSION OF CO 1 (SOCII) and FLOWERING LOCUS T (FT). Recently, several studies have highlighted a role for a product of FT as a component of the floral stimulus or 'florigen'. These recent advances and the proposed mode of action of FT are discussed here.