Phenolic and Flavonoid Contents in the Seeds Extract of Most Commonly Consumed Fruits in India and Their Antioxidant Properties.

Background: Fruits residue may act as a source of environmental pollution by releasing nutrients or toxic chemicals in the soil as well as providing a platform for the reproduction of various disease-causing vectors. Thus, recycling fruit waste in pharmaceutical or agricultural sectors may be one of the options for their management. Because of these aspects, the present study was conducted to assess the total phenolic and flavonoid contents in methanol extract from the seed of most commonly consumed fruits in India and their antioxidant properties using 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay. Methods: The fruits were procured from the fruit shop corner and the seeds were separated manually. The total phenolic and flavonoid content in the methanol extract of seeds of test plants was quantified using standard methods. The DPPH scavenging potential of the extract was further evaluated. Result: The results of the present study showed that the extract of the seed of the test plant has significant amounts of total phenolics, varying from a minimum of 153.72 µg GAE/g to maximum of 344.20 µg GAE/g and flavonoids compounds, varied from a minimum of 118.7 µg OE/g to a maximum of 168.3 µgQE/g. The results further showed that the seed extract possesses DPPH inhibition potential (78.86%-87.39) and their IC50 ranged between 102.60 µg/ml-45.69 µg/ml. The DPPH activity also showed a strong positive relationship with the concentration of extracts and with total phenolic and flavonoid content. The present study suggests that the seed extract of the tested plant has a significant amount of total phenolics and flavonoids compound and possesses higher antioxidant activity. The individual phenolic compound should be identified for its commercial utilization and promotion. [ABSTRACT FROM AUTHOR]