Analysis of Antioxidant Activities, Phenolic and Other Metabolites of Some Biomass Waste (Leaves) of India

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Abstract
Free Radicals and Antioxidants,2018,8,2,102-110.
Published:April 2018
Type:Original Article
Authors:
Author(s) affiliations:

Sainiara Begum1,2, Archana Banerjee1, Bratati De2*

1Department of Botany, Surendranath College, Kolkata, West Bengal, INDIA.

2Phytochemistry and Pharmacognosy Research Laboratory, Department of Botany, University of Calcutta, 35 Ballygunge Circular Road, Kolkata 700019, West Bengal, INDIA.

Abstract:

Background: Antioxidants have important role on human health as well as in food industry. Natural antioxidants are preferred to synthetic antioxidants. Objective: In this study attempt was made to explore the leaf biomass, generally wasted and burnt, as sources of important antioxidant compounds. Methods: Extracts of leaves from five plants e.g. Artocarpus heterophyllus, Haldina cordifolia, Magnolia champaca, Mimusops elengi and Syzygium cumini were analyzed for their antioxidant properties by four different systems of assays. Identification and quantification of important components were performed using GC-MS. Results: All the extracts scavenged DPPH radical, superoxide radical, and chelated metal. S. cumini showed strongest antioxidant activities in all systems of assays. Many important phenols and other metabolites were identified. Correlation between activity and metabolite profile helped to identify important antioxidant compounds in the extracts. Important phenolic antioxidants identified were catechin, epicatechin, protocatechuic acid (from S. cumini), gallic acid, myricetin (from S. cumini, M. elengi), arbutin, 4-hydroxycinnamic acid (from M. elengi). Conclusion: Thus, the leaf biomass may be used as an alternative source of these important phytochemicals having antioxidant activity.