Functional analysis of the Arabidopsis thaliana SBP-box gene SPL3: a novel gene involved in the floral transition
Functional analysis of the Arabidopsis thaliana SBP-box gene SPL3: a novel gene involved in the floral transition
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DOI：
10.1046/j.1365-313x.1997.12020367.x
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发表时间：
1997-08-01
期刊：
影响因子：
7.2
通讯作者：
Huijser, P
中科院分区：
文献类型：
--
作者：
Cardon, GH;Hohmann, S;Huijser, P
描述了拟南芥SPL3基因的分离和初步特性。SPL3属于一个基因家族，该家族编码假定的转录因子，其特征是具有一个保守的DNA结合结构域，即SEP结构域。SPL3的转录受发育调控，主要定位于营养生长和花序顶端分生组织、花分生组织以及叶和花器官原基中。SPL3能识别拟南芥花分生组织特性基因AP1启动子区域的一个保守序列基序。与AP1类似，SPL3的组成型表达导致早花。然而，在ap1突变体背景下SPL3的组成型表达表明，AP1对于SPL3转基因植物的早花表型不是必需的。讨论了SPL3在开花过程中的功能及其可能的功能冗余。
The isolation and initial characterization of the Arabidopsis thaliana SPL3 gene are described. SPL3 belongs to a gene family encoding putative transcription factors characterized by a conserved DNA binding domain, the SEP domain. SPL3 transcription is developmentally regulated and is localized mainly in vegetative and inflorescence apical meristems, floral meristems and in leaf and floral organ primordia. SPL3 recognizes a conserved sequence motif in the promoter region of the A. thaliana floral meristem identity gene AP1. Similarly to API, constitutive expression of SPL3 results in early flowering. However, constitutive expression of SPL3 in an apl mutant background showed that API is not required for the early flowering phenotype of the SPL3 transgenic plants. The function of SPL3 during flowering as well as its possible functional redundancy are discussed.