LEAFY INTERACTS WITH FLORAL HOMEOTIC GENES TO REGULATE ARABIDOPSIS FLORAL DEVELOPMENT
LEAFY INTERACTS WITH FLORAL HOMEOTIC GENES TO REGULATE ARABIDOPSIS FLORAL DEVELOPMENT
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DOI：
10.1105/tpc.4.8.901
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发表时间：
1992-08-01
期刊：
影响因子：
11.6
通讯作者：
SUSSEX, IM
中科院分区：
文献类型：
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作者：
HUALA, E;SUSSEX, IM
在拟南芥叶片突变体中，大部分在野生型植物中注定发育为花的侧边分生组织发育为花序分支，而少数发育为由萼片轮生和心皮组成的异常花。我们分离了几个新的叶类等位基因，构建了一系列与叶类和其他同源突变体影响花发育的双突变体，以确定这些基因如何相互作用以指定侧边分生组织的发育命运。我们发现，在早期的花轮中，叶与雌蕊是完全上位的，并与再花蕊相互作用，而在后期的花轮中，叶与再花蕊是上位的。具有叶片和无瓣a1或无瓣a2的双突变体表现出完全失去轮生叶状结构，节间缩短，以及花典型的腋芽抑制。我们的研究结果表明，叶、APETALA1和APETALA2的产物共同控制侧边分生组织分化为花而不是花序分支。
In the leafy mutant of Arabidopsis, most of the lateral meristems that are fated to develop as flowers in a wild-type plant develop as inflorescence branches, whereas a few develop as abnormal flowers consisting of whorls of sepals and carpels. We have isolated several new alleles of leafy and constructed a series of double mutants with leafy and other homeotic mutants affecting floral development to determine how these genes interact to specify the developmental fate of lateral meristems. We found that leafy is completely epistatic to pistillata and interacts additively with agamous in early floral whorls, whereas in later whorls leafy is epistatic to agamous. Double mutants with leafy and either apetala1 or apetala2 showed a complete loss of the whorled phyllotaxy, shortened internodes, and suppression of axillary buds typical of flowers. Our results suggest that the products of LEAFY, APETALA1, and APETALA2 together control the differentiation of lateral meristems as flowers rather than as inflorescence branches.