Analysis of coloration characteristics of Tunisian soft-seed pomegranate arils based on transcriptome and metabolome. (15th February 2022)

• Record Type: Journal Article
• Authors: Yuan, Lei; Niu, Huihui; Yun, Yurou; Tian, Jun; Lao, Fei; Liao, Xiaojun; Gao, Zhengqing; Ren, Dabing; Zhou, Linyan
• Is Part Of: Food chemistry. Volume 370(2022)
• Publication Date: 2022-02-15
• Subjects: Pomegranate arils color -- Percent polymeric color -- Transcriptome -- Metabolome -- Color analysis; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2021.131270
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: Regions might affect the percent polymeric color of pomegranate. Phenolics of pomegranate arils producing in 7 regions in China were compared. There were significant differences in anthocyanins in each group. Percent polymeric color might be related to the differential expression of. Abstract: In this study, combining metabolome and transcriptome, color related attributes and phenolic compositions of Tunisian pomegranate arils from 7 Chinese regions at same developing stage were studied. The total anthocyanin (TAC), flavonoids, and percent polymeric color (PPC) were ranged at 8.93–28.41 mg/100 g arils, 37.55–69.72 mg/100 g arils, and 3.38–21.96%, respectively. In total, 51 phenolic compounds were characterized, most of which were markedly higher in reddish-purple pomegranate arils than those levels in reddish pomegranate arils. In contrast, the accumulation of tannins was significantly higher in reddish pomegranate arils. Among the 49 differentially expressed genes, 8 and 5 genes were matched to β-glucosidase and peroxidase, respectively. Correlation analysis showed that PPC was negatively correlated with 10 phenolic metabolites and TAC, positively correlated with L*, polymeric color, and 1 gene (|r| > 0.7, p < 0.01). Our results provide new insights for understanding the difference in coloration of pomegranate arils.