논문 상세보기
Functional diversification of soybean FLOWERING LOCUS T homologs
- 언어ENG
- URLhttps://db.koreascholar.com/Article/Detail/294456
FLOWERING LOCUS T (FT) is major determinant of the length of the vegetative phase in plants. To understand the role of FT homologs in flowering time control of soybean, we identified ten soybean FT genes and named GmFTs. Expression analysis of GmFT homologs showed that the transcripts of most FT clade genes are mainly expressed in leaves. The expression of GmFT2a, GmFT2b, GmFT5a, and GmFT6 strongly induced in response to floral inductive short-day condition, but GmFT4 and GmFT6 exhibited opposite expression pattern. To understand the biological function of each GmFT/TFL1 genes in flowering time control, we ectopically expressed GmFT cDNAs in Arabidopsis under the control of CaMV 35S promoter. Interestingly, while 35S:GmFT2a and 35S:GmFT5a transgenic plant showed extremely early flowering phenotype, overexpression of GmFT4 delayed flowering. Furthermore we analyzed expression patterns GmFT genes in the leaves of Korean soybean landraces showing various flowering time. The results showed that the transcript level of two FT homologs, GmFT2a and GmFT5a, was high in early flowering landraces, but low in late flowering landraces. In contrast, GmFT4 exhibited opposite expression pattern to those of GmFT2a and GmFT5a, suggesting that GmFT4 may function antagonistically to GmFT2a and GmFT5a in flowering time control of soybean. These results demonstrated that soybean FT homologs have both unique and conserved functions in the photoperiodic control of flowering compared with those in Arabidopsis.
