大豆GmNF-YC2基因的克隆与功能分析

Cloning and Functional Analysis of GmNF-YC2 Gene in Soybean(Glycine max)

NF-Y(nuclear factor-y)是真核生物中普遍存在的一种转录因子复合物,由3个不同的亚基(NF-YA、NF-YB和NF-YC)组成,并通过作用于其他调控因子的启动子来调节目的基因的表达。本文从大豆垦农18中克隆大豆NF-YC基因GmNF-YC2,并且利用实时荧光定量PCR(qRT-PCR)分析其表达模式,发现GmNF-YC2的表达受光调控,并在开花期第3复叶中表达量最高。结果表明,GmNF-YC2在大豆光周期开花调节中起重要作用。拟南芥原生质体瞬时表达实验证实,GmNF-YC2蛋白定位在细胞核中。这为大豆NF-YC家族基因的功能研究提供重要依据。

The eukaryotic nuclear factor Y （NF-Y） is a ubiquitous transcription factor complex composed of three distinct subunits （NF-YA, NF-YB, and NF-YC）. NF-Y transcription factors typically act on the promoters of other regulatory factors to modulate gene expressions. Here, a NF-YC homologue, GmNF-YC2, was cloned from soybean variety KN18. The expression profiles checked by quantitative real-time RT-PCR （qRT-PCR） showed that GmNF-YC2 was regulated by light but not by circadian clock, and GmNF-YC2 was expressed at the highest level in third trifoliolates at flowering. The results suggested that GmNF-YC2 was one of the important genes in the regulation of flowering in soybean. The transient expression in Arabidopsis protoplasts displayed that GmNF-YC2 protein was localized in nuclear section. The results from this study pave a way to study the function of NF-Y family in soybean and its application in soybean molecular breeding.