Antioxidant potentials of skin, pulp, and seed fractions of commercially important tomato cultivars

Food science and biotechnology (Impact Factor: 0.66). 02/2011; 20(1):15-21. DOI: 10.1007/s10068-011-0003-z

ABSTRACT The rationale of this study is to compare the levels of different antioxidants present in commercially important tomato cultivars
of India, specifically developed to grow in high altitude and plain regions. Major antioxidant components like lycopene, ascorbic
acid, phenolics, and quenching capacity of free radicals were analysed in different fractions of tomato fruit, i.e., skin,
pulp, and seed fractions. Significant differences in antioxidant components were observed among the fractions of the different
cultivars studied. Lycopene content was found to be more in high altitude cultivars (‘Sindhu’ and ‘Shalimar’); however, ascorbic
acid and phenolic content were found to be higher in plain region cultivars (‘PKM1’ and ‘CO3’). To evaluate the antioxidant
capacity, 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing/antioxidant power (FRAP) assays were performed. High altitude
cultivars showed 10–15% higher DPPH free radical scavenging activity and 20–30% increase in FRAP than the plain region cultivars.
Among the different fruit fractions analysed, skin showed the highest level of antioxidants levels and free radical scavenging
activities in all the cultivars tested. The difference in the antioxidants level and activity may be attributed to the genetic
variability of the cultivars.

Keywordstomato–skin–pulp–seed–antioxidant compound–antioxidant activity

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