论文题目:

GmFT4, a Homolog of FLOWERING LOCUS T, Is Positively Regulated by E1 and Functions as a Flowering Repressor in Soybean

论文题目英文:

GmFT4, a Homolog of FLOWERING LOCUS T, Is Positively Regulated by E1 and Functions as a Flowering Repressor in Soybean

论文编号:

第一作者:

翟红

第一作者英文:

Hong zhai

刊物名称:

Plos one

卷期页码:

9, 2.19, e89030 36

发表年度:

2014

联系作者:

夏正俊

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影响因子:

参与作者:

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摘要:

The major maturity geneE1has the most prominent effect on flowering time and photoperiod sensitivity of soybean, but the pathway mediated byE1is largely unknown. Here, we found the expression ofGmFT4, a homolog ofFlowering Locus T,was strongly up-regulated in transgenic soybean overexpressingE1, whereas expression of flowering activators,GmFT2aandGmFT5a, was suppressed.GmFT4expression was strongly up-regulated by long days exhibiting a diurnal rhythm, but down-regulated by short days. Notably, the basal expression level ofGmFT4was elevated when transferred to continuous light, whereas repressed when transferred to continuous dark.GmFT4was primarily expressed in fully expanded leaves. Transcript abundance ofGmFT4was significantly correlated with that of functionalE1,as well as flowering time phenotype in different cultivars. Overexpression ofGmFT4delayed the flowering time in transgenicArabidopsis. Taken together, we propose thatGmFT4acts downstream ofE1and functions as a flowering repressor, and the balance of two antagonistic factors (GmFT4vsGmFT2a/5a) determines the flowering time of soybean.