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The fruit canning industry processes large quantities of the clingstone varieties of peach ( Prunus persica  L. Batch). The occurrence of split-pit formation—the opening of the pit and sometimes splitting of the fruit—causes deterioration of canned fruit quality. The frequency of split-pit formation is influenced by genetic and environmental factors. To increase understanding of the molecular mechanisms underlying split-pit formation in peach, we cloned and characterized the  PPERFUL  and  PPERSHP  genes that are homologues to the genes  FRUITFULL  and  SHATTERPROOF , respectively, which are involved in fruit splitting (pod shattering) in  Arabidopsis thaliana . The deduced amino acid sequences of the two genes had high homology with members of the MADS-box family of transcription factors, and particularly with other members of the FUL-like family of A-type MADS-box proteins and PLENA-like family of C-type MADS-box proteins, respectively.  PPERFUL  and  PPERSHP  were expressed throughout fruit development from full anthesis until fruit harvest. Differences in the mRNA abundance of each gene were compared in a split-pit sensitive and a split-pit resistant variety. Results suggested that temporal regulation of  PPERFUL  and  PPERSHP  expression may have an effect on the split-pit process.

tree physiology

Characterization and expression analysis of  FRUITFULL - and  SHATTERPROOF -like genes from peach ( Prunus persica ) and their role in split-pit formation