Nutritional composition and antioxidative properties of edible wild plants in Sabah

Ng, Xue Ni (2006) Nutritional composition and antioxidative properties of edible wild plants in Sabah. Universiti Malaysia Sabah. (Unpublished)

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Abstract

Five different species of edible wild plants that are commonly consume by locals namely Sintatar (Mentha arvensis), Janggut Kali (Ceratopetris thalictroides), Selim pegun (Oenanthe javanica), Tuhau (Etlingera sp.) and Kakatung (Monochoria vaginalis) were collected from local market (Tamil) Kota Kinabalu for nutritional and antioxidative determination. The nutritional compositions included the proximate component, vitamins content and minerals content were determined by using AOAC method. Radical DPPH scavenging method, β-carotene bleaching method and ferrous ion chelating method were used to determine the antioxidant activity of methanolic extract of all greens. Protein, fat and ash of those wild plants were in the range of 10-21.2g/100g dry weight, 0.9-3.3g/100g dry weight and 13.2-17.6g/100g dry weight respectively. Fibre content of some selected wild species were generally high (15.89/100g) in comparison with Sawi (Brassica juncea) (10.6g/100g). The iron content of Monochoria vaginalis was 33.1mg/g dry weight which is 4 times higher than Brassica juncea. It was found that the magnesium content in most of the edible wild plants was low, 2.55mg/g dry weight. Retinol (Vitamin A) is abundant in most of the edible wild plants. Ceratopetris thalictroides contained the highest retinol content (126J,Jg/100g fresh weight) which is 12 times higher than Brassica juncea. All selected wild species contained a-tocopherol and riboflavin in the range of 1.1-14.8J,Jg/100g fresh weight and 3.4-20.5J,Jg/100g fresh weight respectively. Most of the wild plants contained appreciable amount antioxidant component compared with Brassica juncea. The phenolic, flavonoid and tannin content of the wild plants were ranged between 190-421mgGAE/100g fresh weight, 63.5- 144.0mgRE/l00g fresh weight and 25.5-126.5J,JgTAE/100g fresh weight respectively. The antioxidant activity of selected wild species is generally superior to Brassica juncea. Etlingera sp. has the highest antioxidant activity and chelating ability on ferrous ion among all the samples and Mentha arvensis is a great radical DPPH scavenger. In comparison with other samples, Mentha arvensis has the greatest marketable potential as a specialized cash crop due to its attractive nutritional value and edible portion. As a conclusion, this study had showed the potential of edible wild plants in alleviating undernutrition problems of the local communities cap in the interior areas as well as food crops in order to broaden the diversity of human diet

Item Type: Academic Exercise
Uncontrolled Keywords: wild plant, food crop, human diet, antioxidative determination, AOAC method
Subjects: T Technology > TX Home economics > Nutrition. Foods and food supply
Divisions: SCHOOL > School of Food Science and Nutrition
Depositing User: MDM SITI AZIZAH IDRIS
Date Deposited: 28 Oct 2013 04:18
Last Modified: 17 Oct 2017 04:43
URI: http://eprints.ums.edu.my/id/eprint/7363

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