Department of Horticulture, Kangwon National University, Chuncheon 24341, South Korea; Interdisciplinary Program in Smart Agriculture, Kangwon National University, Chuncheon 24341, South Korea.
Department of Horticulture, Kangwon National University, Chuncheon 24341, South Korea; Interdisciplinary Program in Smart Agriculture, Kangwon National University, Chuncheon 24341, South Korea.
Food Chem. 2022 Aug 1;384:132490. doi: 10.1016/j.foodchem.2022.132490. Epub 2022 Feb 16.
Fruit ripening involves changes in physical, physiological, biochemical, and metabolic activities through the actions of enzymes and regulatory genes. In this study, we elucidate primary and secondary metabolites and antioxidant activities of green 'Hayward' and gold 'Haegeum' kiwifruit cultivars during ripening by comparing ethylene-treated fruit to the control. A total of 36 primary metabolites (20 amino acids, 9 fatty acids, 4 organic acids, and 3 sugars) were identified to be altered significantly during the ripening of both cultivars. Significant changes in secondary metabolites such as total phenols, flavonoids, and vitamin C were also observed during the ripening of both cultivars. Moreover, antioxidant activity assays showed that ripening either maintains or increases the antioxidant activity of kiwifruit cultivars. These findings could assist the fruit industry in developing metabolic markers for indication of the optimum kiwifruit ripening quality and postharvest decisions for storage, distribution, and marketing.
果实成熟过程中，酶和调控基因的作用会引起物理、生理、生化和代谢活动的变化。在这项研究中，我们通过比较乙烯处理过的果实和对照果实，阐明了绿肉‘海沃德’和黄肉‘Haegeum’猕猴桃品种在成熟过程中的初级和次级代谢物以及抗氧化活性。共鉴定出 36 种初级代谢物（20 种氨基酸、9 种脂肪酸、4 种有机酸和 3 种糖）在两个品种的成熟过程中发生了显著变化。在两个品种的成熟过程中，次级代谢物如总酚、类黄酮和维生素 C 也发生了显著变化。此外，抗氧化活性测定表明，成熟过程既可以保持也可以提高猕猴桃品种的抗氧化活性。这些发现可以帮助水果产业开发代谢标志物，以指示猕猴桃最佳成熟品质，并做出储存、配送和营销等采后决策。
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