Origin of floral asymmetry in Antirrhinum
Origin of floral asymmetry in Antirrhinum
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DOI：
10.1038/383794a0
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发表时间：
1996-10-31
期刊：
影响因子：
64.8
通讯作者：
Coen, E
中科院分区：
文献类型：
--
作者：
Luo, D;Carpenter, R;Coen, E
花的背腹不对称被认为是从一个径向对称的祖先条件进化而来的。金鱼草属中第一个控制花不对称的基因--cycloidea基因已经被分离出来。cycloidea基因在花分生组织的背侧区域的非常早期的阶段表达，在那里它影响生长速率和原基起始。在背原基中表达持续到后期，影响花瓣和雄蕊的不对称性、大小和细胞类型。
Dorsoventral asymmetry in flowers is thought to have evolved many times from a radially symmetrical ancestral condition. The first gene controlling floral asymmetry, cycloidea in Antirrhinum, has been isolated. The cycloidea gene is expressed at a very early stage in dorsal regions of floral meristems, where it affects growth rate and primordium initiation. Expression continues through to later stages in dorsal primordia to affect the asymmetry, size and cell types of petals and stamens.