IMPORTIN β4 Facilitates CONSTANS Nuclear Accumulation and FT Activation in Arabidopsis.
The timing of the vegetative-to-reproductive transition is critical for plant reproductive success. In Arabidopsis, the B-box transcription factor CONSTANS (CO) is a central regulator of flowering that activates FLOWERING LOCUS T (FT). Although the transcriptional regulation and post-translational stability of CO have...