Phosphorylation of the strawberry MADS-box CMB1 regulates ripening via the catabolism of abscisic acid.

ABSTRACT: Research on the ripening of fleshy fruits has relied on techniques that measure transcriptional changes. How ripening is linked to posttranslational modifications such as protein phosphorylation remains less studied. Here, we characterize the MADS-box SEPALLATA 4 (SEP4) subfamily transcription factor FaCMB1, a key negative regulator controlling strawberry ripening, whose transcript and protein abundance decrease progressively with fruit development and are repressed by abscisic acid (ABA). Transient RNAi or overexpression of FaCMB1 significantly altered the fruit ripening process and affected the content of endogenous ABA and ripening-related quality. Transcriptome sequencing (RNA-seq) analysis suggested that manipulation of FaCMB1 expression levels affected the transcription of FaASR (ABA

SUBMITTER: Jia H 

PROVIDER: S-EPMC12018792 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature