facilitates floral transition in by affecting the transcription of circadian clock-related genes under short-day photoperiods.

Plants sense photoperiod signals to confirm the optimal flowering time. Previous studies have shown that () functions to promote floral transition in the long-day plant (LDP) ; however, the function and molecular mechanism by which regulates floral transition in short-day plants (SDPs) is still unclear. In this study, we identified a homologous gene, , from , a typical SDP. The morphological changes in the shoot apex and expression analysis under SD conditions showed that adult completed the developmental transition from vegetative growth to reproductive growth after eight SDs. Meanwhile, mRNA exhibited an increasing trend from 0 to 8 d of SD treatment. overexpression in wild-type (WT) and resulted in early flowering. The transcript levels of the () genes , , and , and () homologous gene were upregulated in overexpression (OE) under SD conditions. The transcript levels of some circadian clock-related genes, including (), (), (), and ( and ), were upregulated in OE , while the expression levels of other circadian clock-related genes, such as (), , (), , and (), were downregulated in OE under SD conditions. Taken together, the results suggest that promotes floral transition by fine-tuning the expression of circadian clock-related gene, s and in under SD conditions.