FLD interacts with genes that affect different developmental phase transitions to regulate Arabidopsis shoot development
FLD interacts with genes that affect different developmental phase transitions to regulate Arabidopsis shoot development
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DOI：
10.1046/j.1365-313x.1998.00204.x
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发表时间：
1998-07-01
期刊：
影响因子：
7.2
通讯作者：
Yang, CH
中科院分区：
文献类型：
--
作者：
Chou, ML;Yang, CH
从拟南芥中分离到一个显著延迟开花的新突变等位基因fld-2，并对其进行了鉴定。即使在温室中超过100天的长日条件下，大多数FLD-2突变植株也没有抽苔。此外，突变的花序产生了10多个合花，在形成花之前被大量的莲座状的叶片所覆盖。春化和GA处理均能部分克服该突变的晚花表型，但不受5-azaC处理的影响。双突变体的表型分析表明，FLD-2对早花突变体elf1、elf2和elf3具有上位性。此外，在胚性花1号(Emf1)双突变体中，fld-2通过诱导大量的小无柄叶片，提高了胚性花1号突变体的营养特性。FLD-2Tfl1双突变体的末端花1(Fl1)突变体表型的减少，以及Fld-2Ify和fld-2AP1双突变体的叶状(Ify)和apefala1(AP1)突变体表型的增强，表明FLD也可能参与了花的转变。我们的结果有力地表明，FLD基因在调节拟南芥新梢繁殖能力方面起着关键作用，并导致不同的发育阶段转变。
A new fld mutant allele, fld-2, which significantly delayed flowering, was isolated and characterized in Arabidopsis thaliana. Even under long-day conditions after more than 100 days in the greenhouse, the majority of fld-2 mutant plants had not bolted. In addition, mutant inflorescences produced more than 10 co-florescences that were subtended by a high number of rosette-like leaves before giving rise to flowers. The late-flowering phenotype of the fld-2 mutation could be partially overcome by both vernalization and GA treatment but it was not influenced by 5-azaC treatment. Phenotypic analyses of double mutants indicated that fld-2 is epistatic to early flowering mutants elf1, elf2 and elf3. In addition, fld-2 could enhance vegetative characteristics in embryonic flower 1 (emf1) mutants by causing many small sessile leaves in fld-2 emf1 double mutants. The relief of the terminal flower 1 (fl1) mutant phenotype in fld-2 tfl1 double mutants, and the enhancement of leafy (Ify) and apefala1 (ap1) mutant phenotypes in fld-2 Ify and fld-2 ap1 double mutants, suggest that FLD is also likely to be involved in the floral transition. Our results strongly suggest that the FLD gene plays a key role in regulating the reproductive competence of the shoot and results in different developmental phase transitions in Arabidopsis.