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Asian Journal of Applied Sciences
Year: 2011  |  Volume: 4  |  Issue: 3  |  Page No.: 238 - 246

Determination of Nutritive Value, Mineral Contents and Antioxidant Activity of Some Wild Edible Plants from Meghalaya State, India

Tapan Seal    

Abstract: The study was carried out to analyze the nutritional composition, mineral contents and antioxidant activity of the leaves of Clerodendron colebrookianum, Oenanthe linearis, Sonchus arvensis, Zanthoxylum acanthopodium, roots of Houttuynia cordata, Potentilla lineate and seeds of Castanopsis indica collected from different market of Meghalaya state, India using standard method of food analysis. For different plant species the crude fat content ranged between 0.579±0.01-2.46±0.04% and crude fibre 0.59±0.03-6.30±0.45%. The crude protein content was determined high in the leaves of Z. acanthopodium (28.06±0.14%), C. colebrookianum (27.67±0.42%) and O. linearis (21.80±0.41%) while the carbohydrate content was highest in the nuts of C. indica (61.86±1.42%) and roots of H. cordata (23.45±2.11%). The nutritive value ranged from 883.75±54.03-2724.86±54.50 cal kg-1 in the various wild edible plants. Among the various macronutrients estimated in the plant samples of different wild edible plant potassium was present in the highest quantity (16.10-84.40 mg g-1) followed by calcium (5.85-23.70 mg g-1) and sodium (0.95-3.20 mg g-1). Micronutrients, such as iron, zinc, copper, manganese and chromium were analyzed in the different plant specimens. The antioxidant activity of wild edible plants was examined. The content of total phenolics in the aqueous methanolic extracts was calculated as Gallic Acid Equivalent (GAE) and radical scavenging activity was estimated as IC50 values using 1,1- diphenyl-2-picrylhydrazyl (DPPH). The total phenol varied from 17.32±0.10 to 552.01±0.48 mg g-1 in the extracts. The highest radical scavenging effect was observed in C. indica with IC50 = 115.27±0.24 μg mL-1. The greater amount of phenolic compound leads to more potent radical scavenging effect as shown by C. indica. Nutritive values of these plants were compared to the other wild and commercial leafy vegetables and fruits. It has been observed that the mineral contents and nutritional values of the plants evaluated in the present study were richer than that of the conventional leafy vegetables and fruits.

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