Calcium-dependent protein kinase CPK32 mediates calcium signaling in regulating Arabidopsis flowering time.

ABSTRACT: Appropriate flowering time is critical for the reproductive success of plant species. Emerging evidence indicates that calcium may play an important role in the regulation of flowering time. However, the underlying molecular mechanisms remain unclear. In this study, we demonstrate that calcium-dependent protein kinase 32 (CPK32) regulates flowering time by affecting the alternative polyadenylation of FLOWERING CONTROL LOCUS A (FCA) and altering the transcription of FLOWERING LOCUS C (FLC), a central repressor of flowering time. The knockdown of CPK32 results in an obvious late flowering phenotype and dramatically enhanced FLC transcription. CPK32 interacts with FCA, and phosphorylates the serine⁵⁹² of FCA in a Ca²⁺-dependent m

SUBMITTER: Li X 

PROVIDER: S-EPMC8783668 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature