COMPARISON OF PHENOLIC AND ANTIOXIDANT SUBSTANCE CONTENT OF SOME KIDNEY BEAN GENOTYPES

Kidney bean, known for its valuable vegetable proteins, holds a significant place among leguminous plants due to its high protein content, as well as carbohydrates, vitamins, minerals, phenolic compounds, and antioxidant contents. Among leguminous plants identified as the most fundamental food for human consumption worldwide, kidney bean stands out not only for its rich nutritional content but also for significantly improving soil fertility, promoting advantageous dietary and health trends. The study aims to compare 15 different kidney bean genotypes in terms of total phenolics, total flavonoids, tannins, and antioxidant activities. Among the genotypes, genotype A4 has the highest content of total phenolic substance (572.09 mg GAE/g), total flavonoid substance (49.37 mg CE/g), DPPH (92.14%), ABTS (14.26 µg TE/g), total hydrolyzable tannin (8.94 mg/kg), and ferric reducing antioxidant activity (10.55 mg AAE/g), while genotype A7 has the lowest value in terms of total phenolic substance (153.01 mg GAE/g), DPPH (28.92%), condensed tannin (102.86 mg/kg), ferric reducing antioxidant activity (3.87 mg AAE/g), and ABTS (4.71 µg TE/g).The study concludes that the different colors of the identified genotypes lead to significant differences in phenolic and antioxidant contents.