The S locus-linked Primula homeotic mutant sepaloid shows characteristics of a B-function mutant but does not result from mutation in a B-function gene
The S locus-linked Primula homeotic mutant sepaloid shows characteristics of a B-function mutant but does not result from mutation in a B-function gene
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S位点连接的报春花同源突变体萼片表现出B功能突变体的特征，但不是由B功能基因突变引起的
DOI：
10.1111/j.1365-313x.2008.03584.x
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Li J
中科院分区：
文献类型：
--
作者：
Li J
报春花的同种异体和花发育突变体，包括重瓣，软管中的软管，绿色中的Jack和分裂花被，自16世纪后期以来一直作为观赏植物种植，但直到最近才引起有限的科学关注。在这里，我们描述了一个新的突变表型的特征，seppaloid，产生的花只包括萼片和心皮。这些类蛋白突变是隐性的，与控制花异型的基因座有关。表型表现出发育变异性，有三轮萼片包围着可育心皮，有两轮萼片包围着减少的第三轮萼片包围着第四轮心皮，也有三轮萼片包围着异常心皮。在某些方面，这些表型类似于拟南芥和抗鼻同源性B -功能突变体sapetala3/缺陷（ap3/def）和雌蕊花/globosa（pi/glo）。我们分离了报春花的功能基因espvdefens （PvDEF）和pvglobosa (PvGLO)，这两个基因的表达在这些类蝶素突变体中都受到影响。PvGLO和epaloid一样，与theSlocus相连，而pvdefo则不是。然而，我们的分析显示sepaloid和pvglod代表不同的基因。我们得出结论，sepaloidis是anS连接的花器官识别基因pvdefo和pvglo的独立调节因子。
Floral homeotic and flower development mutants ofPrimula, includingdouble,Hose in Hose,Jack in the GreenandSplit Perianth, have been cultivated since the late 1500s as ornamental plants but until recently have attracted limited scientific attention. Here we describe the characterization of a new mutant phenotype,sepaloid, that produces flowers comprising only sepals and carpels. Thesepaloidmutation is recessive, and is linked to theSlocus that controls floral heteromorphy. The phenotype shows developmental variability, with flowers containing three whorls of sepals surrounding fertile carpels, two whorls of sepals with a diminished third whorl of sepals surrounding a fourth whorl of carpels, or three whorls of sepals surrounding abnormal carpels. In some respects, these phenotypes resemble the Arabidopsis andAntirrhinumhomeotic B‐function mutantsapetala3/deficiens(ap3/def) andpistillata/globosa(pi/glo).We have isolated thePrimula vulgarisB‐function genesPvDEFICIENS(PvDEF) andPvGLOBOSA(PvGLO), expression of both of which is affected in thesepaloidmutant.PvGLO, likesepaloid, is linked to theSlocus, whereasPvDEFis not. However, our analyses reveal thatsepaloidandPvGLOrepresent different genes. We conclude thatSEPALOIDis anS‐linked independent regulator of floral organ identity genes includingPvDEFandPvGLO.