The AGAMOUS-LIKE 20 MADS domain protein integrates floral inductive pathways in Arabidopsis
The AGAMOUS-LIKE 20 MADS domain protein integrates floral inductive pathways in Arabidopsis
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DOI：
10.1101/gad.813600
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发表时间：
2000-09-15
影响因子：
10.5
通讯作者：
Lee, I
中科院分区：
文献类型：
--
作者：
Lee, H;Suh, SS;Lee, I
拟南芥冬一年生生态型的极晚开花行为主要由两个基因Frigida（FRI）和FLOWARIDLOCUS C（FLC）决定。MADS结构域基因AGAMOUS-LIKE 20（AGL 20）在激活标签诱变中被鉴定为显性FRI抑制基因。AGL 20的过表达不仅抑制具有功能性FRI和FLC等位基因的植物的延迟开花，而且抑制植物发育的营养阶段期间的延迟相变。有趣的是，AGL 20的表达不仅受到冗余春化和开花的自主途径的正调控，而且还受到光周期途径的正调控。我们的研究结果表明，AGL 20是一个重要的集成商的三个途径控制开花拟南芥。
The very late-flowering behavior of Arabidopsis winter-annual ecotypes is conferred mainly by two genes, FRIGIDA (FRI) and FLOWERING LOCUS C (FLC). A MADS-domain gene, AGAMOUS-LIKE 20 (AGL20), was identified as a dominant FRI suppressor in activation tagging mutagenesis. Overexpression of AGL20 suppresses not only the late flowering of plants that have functional FRI and FLC alleles but also the delayed phase transitions during the vegetative stages of plant development. Interestingly, AGL20 expression is positively regulated not only by the redundant vernalization and autonomous pathways of flowering but also by the photoperiod pathway. Our results indicate that AGL20 is an important integrator of three pathways controlling flowering in Arabidopsis.