Figure 3.

A proposed model for SlZFP2 action on fruit development and ripening During fruit set and development, SlZFP2 acts as a transcription repressor to fine tune ABA biosynthesis through direct binding to the promoters of NOT, SIT, FLC and SlAO1. Decreasing ABA biosynthesis by high SlZFP2 expression leads to relatively lower ethylene production which facilitates fruit set and prevents floral organ senescence. In addition, SlZFP2 also prevents the expression of the ripening regulator CNR before the onset of ripening process, either directly or indirectly.