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Article Abstract
Soybean [ (L.) Merr.] is a short-day (SD) plant that is sensitive to photoperiod, which influences flowering, maturity, and even adaptation. TEOSINTE-BRANCHED1/CYCLOIDEA/PROLIFERATING CELL FACTOR (TCP) transcription factors have been shown to regulate photoperiodic flowering. However, the roles of TCPs in SD plants such as soybean, rice, and maize remain largely unknown. In this study, we cloned the gene from soybean and investigated its expression pattern and function. Compared with wild-type (WT) plants, -overexpression plants flowered earlier under long-day (LD) conditions but not under SD conditions. Consistent with this, the overexpression lines showed upregulation of the flowering-related genes , , , , , , , , , , and under LD conditions. Further investigation revealed that GmTCP40 binds to the promoter and promotes its expression. Analysis of the haplotypes and phenotypes of soybean accessions demonstrated that one haplotype (Hap6) may contribute to delayed flowering at low latitudes. Taken together, our findings provide preliminary insights into the regulation of flowering time by while laying a foundation for future research on other members of the family and for efforts to enhance soybean adaptability.
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| http://dx.doi.org/10.3390/biom14040465 | DOI Listing |
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