Genetic control by Arabidopsis genes LEUNIG and FILAMENTOUS FLOWER in gynoecium fusion
Genetic control by Arabidopsis genes LEUNIG and FILAMENTOUS FLOWER in gynoecium fusion
复制标题
DOI：
10.1007/pl00014012
复制
发表时间：
2001-12-01
影响因子：
2.8
通讯作者：
Huang, H
中科院分区：
文献类型：
--
作者：
Chen, CB;Xu, Y;Huang, H
拟南芥基因丝状花(FIL)已被证明控制花序和花分生组织的形成和发育。这包括在花原基内建立成花区域和建立花分生组织特征的早期步骤。另一个拟南芥基因Leunig(Lug)以前被发现用来指定花器官的身份和控制雌蕊的融合。本文描述了一个新分离的FIT等位基因FIL-21的花表型，以及FIL-21单突变体和FIL-21lug-101双突变体雌蕊的表型比较。FIL-21的雌蕊具有良好的融合结构，而强的lug-101除雌蕊顶端外没有融合。然而，雌核发育不良在FIL-21lug-101双突变体中受到显著影响，未融合。在双突变体的晚出现花中，雌蕊甚至可以完全分裂成几个部分。这些结果表明，LUG和FIL在花的发育过程中有一个部分冗余的功能结构域，并协同调节雌蕊融合。
The Arabidopsis gene FILAMENTOUS FLOWER (FIL) has been demonstrated to control the formation and development of inflorescence and floral meristems. This includes an early step in the establishment of a flower-forming domain within the floral primordium and the establishment of floral meristem identity. Another Arabidopsis gene LEUNIG (LUG) was previously found to specify the identity of the floral organ and control gynoecium fusion. In this paper, we describe floral phenotypes of a newly isolated fit allele, fil-21, and the phenotypic comparison of gynoecia between the fil-21 single mutant and fil-21 lug-101 double mutant The gynoecium of fil-21 displays a well-fused structure, while that of the strong lug allele, lug-101, is unfused except at the gynoecium apex. However, gynoecia are markedly affected in the fil-21 lug-101 double mutant, being unfused. In late-appearing flowers of the double mutant, the gynoecia can even separate completely into several parts. These results suggest that LUG and FIL have a functional domain that is partially redundant in flower development, and synergistically regulate the gynoecium fusion.