Abscisic acid-responsive transcription factors PavDof2/6/15 mediate fruit softening in sweet cherry.

ABSTRACT: Softening is a key step during fruit ripening that is modulated by the interplay between multiple phytohormones. The antagonistic action of abscisic acid (ABA) and auxin determines the rate of fruit ripening and softening. However, the transcription factors that integrate ABA and auxin signals to regulate fruit softening remain to be determined. In this study, we identified several DNA-binding with One Finger (Dof) transcription factors essential for ABA-promoted fruit softening, based on transcriptome analysis of two sweet cherry (Prunus avium L.) varieties with different fruit firmness. We show that PavDof6 directly binds to the promoters of genes encoding cell wall-modifying enzymes to activate their transcription, while PavDof2/15 directly repress their transcription. Transient overexp

SUBMITTER: Zhai Z 

PROVIDER: S-EPMC9706453 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature