Expression of the alfalfa CCCH-type zinc finger protein gene MsZFN delays flowering time in transgenic Arabidopsis thaliana

文献类型： 外文期刊

第一作者： Chao, Yuehui

作者： Chao, Yuehui;Zhang, Tiejun;Yang, Qingchuan;Kang, Junmei;Qin, Zhihui;Sun, Yan;Gruber, Margaret Yvonne;Qin, Zhihui

作者机构：

关键词： Medicago sativa;Dark-enhanced expression;Flowering time;Arabidopsis thaliana

期刊名称：PLANT SCIENCE （ 影响因子：4.729； 五年影响因子：5.132 ）

ISSN： 0168-9452

年卷期： 2014 年 215 卷

页码：

收录情况： SCI

摘要： Zinc finger proteins comprise a large family and function in various developmental processes. CCCH type zinc finger protein is one kind of zinc finger protein, which function is little known. MsZFN gene encoding a CCCH type zinc finger protein was first discovered by its elevated transcript level in a salt-induced alfalfa SSH cDNA library. The previous experiment had showed that MsZFN protein was localized to the nucleus and little is known about the function of MsZFN protein and its homologous proteins in other plants including model plant, Arabidopsis thaliana. In the current study, we found that MsZFN transcript levels increased in alfalfa under continuous dark conditions and that expression was strongest in leaves and weakest in unopened flowers under light/dark conditions. Expression of MsZFN in transgenic Arabidopsis plants resulted in late flowering phenotypes under long day conditions. Yeast two-hybrid and bimolecular fluorescence complementation assays indicated that MsZFN protein can interact with itself. Transcript analyses of floral regulatory genes in MsZFN* transgenic Arabidopsis showed enhanced expression of the flowering repressor FLOWERING LOCUS C and decreased expression of three key flowering time genes, FLOWERING LOCUST, SUPPRESSOR OF OVEREXPRESSION OF CONSTANS and GIGANTEA. These results suggest that MsZFN primarily controls flowering time by repressing flowering genes expression under long day conditions. (C) 2013 Elsevier Ireland Ltd. All rights reserved.

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