在发育中的花朵中表达的桉属MADS-box基因。
Eucalypt MADS-box genes expressed in developing flowers.
作者信息
Southerton S G, Marshall H, Mouradov A, Teasdale R D
机构信息
ForBio Research Pty. Ltd., 50 Meiers Road, Indooroopilly, Queensland 4068, Australia.
出版信息
Plant Physiol. 1998 Oct;118(2):365-72. doi: 10.1104/pp.118.2.365.
Abstract
Three MADS-box genes were identified from a cDNA library derived from young flowers of Eucalyptus grandis W. Hill ex Maiden. The three egm genes are single-copy genes and are expressed almost exclusively in flowers. The egm1 and egm3 genes shared strongest homology with other plant MADS-box genes, which mediate between the floral meristem and the organ-identity genes. The egm3 gene was also expressed strongly in the receptacle or floral tube, which surrounds the carpels in the eucalypt flower and bears the sepals, petals, and numerous stamens. There appeared to be a group of genes in eucalypts with strong homology with the 3' region of the egm1 gene. The egm2 gene was expressed in eucalypt petals and stamens and was most homologous to MADS-box genes, which belong to the globosa group of genes, which regulate organogenesis of the second and third floral whorls. The possible role of these three genes in eucalypt floral development is discussed.
摘要
从巨桉（Eucalyptus grandis W. Hill ex Maiden）幼花的cDNA文库中鉴定出三个MADS-box基因。这三个egm基因是单拷贝基因，几乎只在花中表达。egm1和egm3基因与其他植物MADS-box基因具有最强的同源性，这些基因在花分生组织和器官特征基因之间起介导作用。egm3基因在花托或花管中也强烈表达，花托或花管围绕着桉属植物花中的心皮，并着生萼片、花瓣和众多雄蕊。桉属植物中似乎存在一组与egm1基因3'区域具有高度同源性的基因。egm2基因在桉属植物的花瓣和雄蕊中表达，与属于globosa基因家族的MADS-box基因同源性最高，该家族基因调控花的第二轮和第三轮器官发生。本文讨论了这三个基因在桉属植物花发育中的可能作用。
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