Some Biochemical Parameters of Eggplant Species from Turkey and Nigeria

Abstract

In this study, the amounts of vitamins, beta-carotene, lycopene, glutathione (GSH, GSSG), malondialdehyde (MDA), and hydroxyneoneal (4-HNE) in eggplant samples grown in Turkey (dark and light colored eggplant) and Nigeria (white garden egg, bitter apple and bitter tomato) were determined by HPLC. In addition, the total amount of phenolic, and flavonoid substances and antioxidant capacity (ABTS, IC50) were determined by a UV-Visible spectrophotometer. The amounts of vitamins A, E, ?-carotene and lycopene were found to be in the ranged of 0.13 -3.63; 3.63-39.0; 1.87-30.5; 1.52-6.79 µg/g dw, respectively. The amounts of vitamin C, B1, B2, B3, B5, B6, B9 and B12 ranged 357-1136; 11.0-95.6; 1.9-5.4; 83-265; 30.16-65.43; 127-348; 24.74-78.6; 0.11-0.68 µg/g dw, respectively. GHS, GSSG, MDA and 4-HNE were found to be in between 364-1930; 225-962; 1.5-8.4; 24.57-38.25 µg/g dw, respectively. While the total phenolic substance was between 706-1260 µg GAE/g dw, the total amount of flavonoid substance was found to be in between 167-356 µg QE/g dw. ABTS values ranged between 365-692 µmol Troloxs/g dw, while IC50 values were in 65.1-99.3 µg/mL. It can be said that the differences observed in the parameters observed in eggplant varieties grown both in Turkey and Nigeria are due to genetic and geographical differences.