Gene expression and metabolite profiling analyses of developing pomegranate fruit peel reveal interactions between anthocyanin and punicalagin production

The fruit peel of pomegranate ( Punica granatum L.) contains high concentrations of polyphenols, which play a critical role in determining the color and nutritional value of fruits. This study evaluated and compared the production of two major classes of polyphenols in the pomegranate fruit skin, i....

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Bibliographic Details
Published in:Tree genetics & genomes 2019-04, Vol.15 (2), p.1-13, Article 22
Main Authors: Harel-Beja, Rotem, Tian, Li, Freilich, Shiri, Habashi, Rida, Borochov-Neori, Hamutal, Lahav, Tamar, Trainin, Taly, Doron-Faigenboim, Adi, Ophir, Ron, Bar-Ya’akov, Irit, Amir, Rachel, Holland, Doron
Format: Article
Language:English
Subjects:
Anthocyanins
Biomedical and Life Sciences
Biotechnology
Correlation analysis
Cultivars
Developmental stages
Forestry
Fruits
Gene expression
Genetic factors
Genome Biology
Life Sciences
Metabolites
Nutritive value
Original Article
Pigments
Plant Breeding/Biotechnology
Plant Genetics and Genomics
Polyphenols
Punica granatum
Skin
Tannins
Tree Biology
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Summary:The fruit peel of pomegranate ( Punica granatum L.) contains high concentrations of polyphenols, which play a critical role in determining the color and nutritional value of fruits. This study evaluated and compared the production of two major classes of polyphenols in the pomegranate fruit skin, i.e., anthocyanins, the main pigments in pomegranate, and punicalagin, a highly bioactive hydrolyzable tannin that is synthesized from an intermediate of the shikimate pathway. Gene expression and metabolite (anthocyanins and punicalagin) accumulation were determined, at three stages of fruit development, in the peel of red and pink cultivars, containing high and low levels of anthocyanins, respectively. Red and pink pomegranate cultivars showed the highest difference in gene expression during the transition from early to late fruit developmental stages, while differences between the cultivars were relatively small at each developmental stage. Positive correlations were found between anthocyanin and total punicalagin content. Of the differentially expressed contigs, 3093 and 312 contigs were correlated (Pearson’s r , |0.75|; P  
ISSN:1614-2942
1614-2950
DOI:10.1007/s11295-019-1329-6