Functional characterization of B class MADS-box transcription factors in Gerbera hybrida.

Functional characterization of B class MADS-box transcription factors in Gerbera hybrida.
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DOI:
10.1093/jxb/erp279
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发表时间:
2010
影响因子:
6.9
通讯作者:
Teeri TH
Teeri TH
中科院分区:
生物学1区
文献类型:
--
作者:
Broholm SK;Pöllänen E;Ruokolainen S;Tähtiharju S;Kotilainen M;Albert VA;Elomaa P;Teeri TH

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根据经典的ABC模型,B功能基因参与决定花瓣和雄蕊的发育。大多数核心真双子叶植物物种具有属于三个不同谱系的B类基因:PI、euAP 3和TM 6谱系,尽管拟南芥和金鱼草似乎都失去了它们的TM 6样基因。对三种非洲菊(Gerberahybrida)B类MADS盒基因-PI/GLO样GGLO 1、euAP 3类GDEF 2和TM 6样GDEF 1-进行了功能研究,并显示了第二种euAP 3样基因GDEF 3的数据。在系统发育分析中,GDEF 3是GDEF 2的一个密切相关的parathyroid,并且显然起源于所有菊科植物共有的重复。表达分析和转基因表型证实,GGLO 1和GDEF 2介导的经典B功能,因为它们决定花瓣和雄蕊的身份。然而,基于酵母中的测定,非洲菊中可能存在三种B类异二聚体组合。除了GGLO 1和GDEF 2蛋白的相互作用外,GGLO 1还与GDEF 1和GDEF 3配对。GDEF 1的分析代表了茄科以外的核心真双子叶植物物种中TM 6样基因的第一个功能特征。类似于其在矮牵牛和番茄中的亲戚,表达模式和转基因表型表明GDEF 1不参与花瓣身份的确定,但在调节雄蕊发育中具有冗余作用。
According to the classical ABC model, B-function genes are involved in determining petal and stamen development. Most core eudicot species have B class genes belonging to three different lineages: the PI, euAP3, and TM6 lineages, although both Arabidopsis and Antirrhinum appear to have lost their TM6-like gene. Functional studies were performed for three gerbera (Gerbera hybrida) B class MADS-box genes—PI/GLO-like GGLO1, euAP3 class GDEF2, and TM6-like GDEF1—and data are shown for a second euAP3-like gene, GDEF3. In phylogenetic analysis, GDEF3 is a closely related paralogue of GDEF2, and apparently stems from a duplication common to all Asteraceae. Expression analysis and transgenic phenotypes confirm that GGLO1 and GDEF2 mediate the classical B-function since they determine petal and stamen identities. However, based on assays in yeast, three B class heterodimer combinations are possible in gerbera. In addition to the interaction of GGLO1 and GDEF2 proteins, GGLO1 also pairs with GDEF1 and GDEF3. This analysis of GDEF1 represents the first functional characterization of a TM6-like gene in a core eudicot species outside Solanaceae. Similarly to its relatives in petunia and tomato, the expression pattern and transgenic phenotypes indicate that GDEF1 is not involved in determination of petal identity, but has a redundant role in regulating stamen development.
DOI: 10.1073/pnas.0801359105
发表时间: 2008-07-01
影响因子: 11.1
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期刊: GENOME RESEARCH
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发表时间: 2008
影响因子: 6.9
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发表时间: 2003-05-27
影响因子: 11.1
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DOI: 10.1093/oxfordjournals.molbev.a025808
发表时间: 1997-07-01
影响因子: 10.7
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