Phytochemical Variations in Different Tomato Genotypes Grown in Eastern Indian Indo - Gangetic Regions

Abstract

In this study, fifteen commercial varieties, nine exotic genotypes, and three w ild species of tomato grown in Eastern India were analyzed for variations in different phytochemicals viz . ascorbic acid, lycopene, total carotenoids, total phenolics content and total antioxidant capacity. Selected genotypes showed significant differences with respect to phytochemical composition. Among antioxidant property parameter, ascorbic acid content ranged between 12.62 to 76.15 mg 100 g - 1 of Fresh Weight (FW), whereas, the total phenolic content and total antioxidant capacity varied from 41.10 to 1 39.59 mg GAE 100 g - 1 of FW and 1.16 to 4.52 μmol Trolex Equivalent (TE) g - 1 of FW, respectively. Among carotenoid parameters, lycopene and total carotenoids content in whole tomato fruit ranged between 0.47 to 5.48 and 1.14 to 5.79 mg 100 g - 1 of FW, respec tively. Interestingly, it was found that, among the evaluated genotypes, Exotic Collection (EC lines) showed significant enriched amount of these phytochemicals. Results indicated that the maximum ascorbic acid (76.15 mg 100 g - 1 FW), total phenolics conten t (139.59 mg GAE 100 g - 1 of FW), and total antioxidant capacity (4.52 μmol TE g - 1 of FW) was highest in exotic collection EC 528372, while, lycopene (5.48 mg 100 g - 1 of FW) and total carotenoids content (5.79 mg 100 g - 1 of FW) were recorded highest in cult ivar Rio Grande. Thus, this group of screened genotypes consisting of phytochemical rich wild species and exotic collection can be further used for improvement of functional quality of tomato in future breeding programs of India and the Indo Gangetic regio n. Keywords : Antioxidant, Ascorbic acid, Carotenoid parameters, Lycopene.