Cloning and characterization of a FLO/LFY ortholog in Gossypium hirsutum L.

文献类型： 外文期刊

第一作者： Jie Li

作者： Jie Li;Shu-Li Fan;Mei-Zhen Song;Chao-You Pang;Heng-Ling Wei;Wei Li;Jian-hui Ma;Jiang-Hui Wei;Jian-guo Jing;Shu-Xun Yu

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关键词： Gossypium hirsutum L.;GhLFY;Transgenic;Early flowering;ChIP

期刊名称：PLANT CELL REPORTS （ 影响因子：4.57； 五年影响因子：4.463 ）

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收录情况： SCI

摘要： Flowering is a very important phase during which plants produce the organs for sexual reproduction. The FLORICAULA/LEAFY (FLO/LFY) homologs play a major role in the initiation of flowering. To understand the mechanism of the transition from the vegetative to reproductive phases in Upland cotton (Gossypium hirsutum L.), we isolated a candidate LFY gene from G. hirsutum L. (GhLFY) that showed a high degree of similarity to other plant homologs of FLO/LFY. qPCR analysis showed that GhLFY was highly expressed in the shoot apex, with substantial upregulation at the third true leaf expansion stage during floral bud differentiation. Subcellular localization studies revealed GhLFY localization in the nucleus. Ectopic expression of the GhLFY coding region in Arabidopsis resulted in early flowering. The expression of the GhLFY coding region under the control of the 35S promoter complemented the lfy-5 mutation in transgenic Arabidopsis lfy-5 mutant plants. Furthermore, a chromatin immunoprecipitation assay revealed that GhLFY may function downstream of GhSOC1 during the initiation of flowering in G. hirsutum L. GhLFY was likely to be regulated by GhSOC1, which binds to the LFY promoter in Arabidopsis. These results suggest that GhLFY is a FLO/LFY ortholog that may be involved in controlling flowering time and floral development.

分类号： Q942

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