Valorisation of weeds as inexpensive sources of added value products: Oxalis pes-caprae and Fumaria capreolata
2010
Gucluturk, I.
The aim of this study was a contribution to the exploitation of weeds as inexpensive and renewable sources for added value natural products. The study focused on Oxalis pes-caprae and Fumaria capreolata, common weeds. The plant tissues were extracted by various polarity solvents and were assessed for their polyphenolic composition and antioxidant potential. The phytochemical profiles of O. pes-caprae and F. capreolata were taken by LC-DAD-MS (ESI plus). The total polyphenol content ranged between 3.32 and 8.46 mg GAE /mg extract for O. pes-caprae and 1.96 and 2.99 mg GAE/mg extract for F. capreolata. The antioxidant activity which was evaluated using DPPHo varied from 0.28 to 0.44 mg of FAE/mL for O. pes-caprae and 0.44 to 0.51 mg FAE/mL for F. capreolata. The hydroxyl free radical scavenging activity was determined by the Co(II)/ EDTA-induced luminol chemiluminescence method and ranged from 0.08 to 0.57 micrograms of FAE/mL for O. pes-caprae and 0.24 to 0.49 micrograms FAE/mL for F. capreolata. The range of antioxidant capacity among plant extracts was not wide according to the stability test results. From the results a high correlation was found between total phenolic content and antiradical activity for both O. pes-caprae and F. capreolata measured by the DPPHo method, while very low correlation was found when antioxidant activity was estimated by the CL method.
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This bibliographic record has been provided by Mediterranean Agronomic Institute of Chania