Published in Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 21 ISSUE 4
Written by Alexandru MÎRZA
The identification of alternative crops that require less water and produce high yields of organic matter is an important step towards a sustainable agriculture. This research was focused on determining the level of antioxidant activity of leaf and fruit extracts of some Rubus species, growing under the climatic conditions of the Republic of Moldova: Rubus fruticosus L., Rubus idaeus L. and Rubus loganobaccus L.H. Bailey. We evaluated the total phenol content (Folin-Ciocalteau assay): in vitro antioxidant capacity employing DPPH; ABTS methods and ferrozine test for iron chelating capacity. In leaf extracts, the total phenolic content ranged from 28.70 to 90.84 GAE/g DW and in fruit extracts – 13.97 to 45.08 GAE/g DW. In all assays, the leaf extracts of studied Rubus species showed the highest values of antioxidant activity (DPPH — IC50) = 45.39 — 68.11 µg/ml; ABTS — 42.57 µM TE/g dry matter, iron chelating capacity — 53.06 %). A high correlation was found between the values for the total phenolic content and the antioxidant activity. Our results confirmed that leaf extracts of Rubus species can prevent activity of free radicals by scavenging or by inhibiting them.
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