Comparative metabolomic analysis of flavor and metabolite profiles across cultivated kiwifruit species

Le résumé fourni par la source

Kiwifruit (Actinidia spp.) is an economically important fruit valued for its sensory and nutritional properties. This study characterized the metabolomic composition of four kiwifruit species (A. arguta, A. chinensis, A. deliciosa, and A. eriantha) using volatile profiling and widely targeted metabolomics. A total of 234 volatile organic compounds were detected, with esters as the dominant class. Quantitative differences in flavor-active compounds were observed among species. Widely targeted metabolomics identified 1184 metabolites. Metabolic profiles were significantly influenced by genetic background. A. arguta exhibited a flavonoid rich profile, for instance, quercetagetin-7-O-glucoside was exclusively found in A. arguta cultivars and validated as a biomarker for species identification. Six compounds (catechin, esculin, naringenin, quercetin, scopolin, and taxifolin) were validated by HPLC-MS/MS and have been associated with traditional Chinese medical applications, including alleviating irritability, promoting diuresis, and anti-inflammatory effects. This study provides a framework for breeding kiwifruit cultivars optimized for sensory appeal and health-promoting functions.

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