Abscisic acid (ABA) is a fundamental regulator of plant development, growth, and drought adaptation, and it modulates the transition to flowering. However, the molecular mechanisms by which ABA delays flowering remain unclear. Recently, ABA INSENSITIVE 2 (ABI2), a core component of the ABA signaling pathway, was reported to positively regulate floral transition in . The expression of floral repressors such as and was strongly upregulated, whereas flowering promoting genes including , and were downregulated in the mutant. Moreover, ABI5 protein levels and phosphorylation status were enhanced in , suggesting that ABI2 reduces ABI5 activity and suppresses the activation of its target genes, such as . Genetic analyses revealed that ABI2 functions upstream of ABI5. In conclusion, these findings indicate that ABI2 is a major switch that fine-tunes the crosstalk between ABA signaling and floral transition in .