Antioxidant activity, beta-carotene, lycopene and flavonoid content of Thai native cultivars of green mango (Mangifera indica) after harvest

Abstract

Mango is an economic crop. In Thailand, mango can growth for every season in the year and can be grown both green and ripe mango. Ripe mango is very famous and can be exported to international market. A study found that Thai native ripe mango was found to have great nutritional value. Green mango was widely consumed in local market. However, there was lacks of its nutritional information. The nutritional information can encourage consumer to increase green mango consumption. The aim of this research was to study antioxidant activity, beta-carotene, lycopene and flavonoid content of Thai native green mango cultivars. The total phenolic content, DPPH activity, FRAP activity, beta-carotene, lycopene and flavonoid content by HPLC were determined. The results showed that total phenolic content, DPPH activity and FRAP activity of Thai native cultivars of green mango were 121.99 – 641.75 mg gallic acid/ 100g fresh weight, 0.35 – 1.25 mmole Trolox/100 g FW, and 0.03 – 0.17 mmole Trolox/100 g fresh weight, respectively. There were slight differences among cultivars. The beta-carotene content was found to be 5.53 – 41.68 µg/100 g fresh weight. The ‘Thong Dam’ cultivar was found to have the highest beta-carotene content, 42.43 µg/100 g fresh weight. Lycopene content was 0.11 – 0.23 mg/100g fresh weight and high enough to be detected in only Keaw, Mahachanok, Nam Dok Mai, Thong Dam, and Pim-Sean Man cultivars . The thirteen cultivars mango had flavonoid content of 24.97 – 172.38 mg/100 g fresh weight. The ‘Chokana’ cultivar of mango gave the highest flavonoid content.