Nutrient and antinutrient composition of three varieties ofPiper species
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The proximate composition of three varieties ofPiper guineense (Odusa — Ibibio/Efik) viz. ‘Uyat Odusa’ (cultivated and peppery), ‘Eting-keni Ikot’ (wild forest variety) and ‘Eting-keni mben inyang’ (wild, riverine variety), were determined using available standard methods. Also determined were mineral, antinutrient and ascorbate levels. The cultivated pepperic variety had the highest content of crude protein and moisture (18.9% and 97% respectively) while the wild, riverine variety had the highest content of ether extract, carbohydrate and calories (7.79%, 63.38% and 398 cals respectively). The cultivated variety had appreciable amounts of phosphorus (1.12 mg/100 g), potassium (1.2 mg/100 g), sodium (0.24 mg/100 g), zinc (0.18 mg/100 g), and copper (0.18 mg/100 g) while the forest variety contained more of calcium (12.38 mg/100 g), magnesium (1.21 mg/100 g) and iron (0.85 mg/100 g). The wild riverine variety appeared to have the least mineral content but had the highest ascorbate level of 173.4 mg/100 g. Of four antinutrients assayed, the cultivated pepperic one had the least quantities while the forest variety was highest in hydrocyanic acid (85.8 mg/100 g) and glucosinolates (0.20 mg/100 g). The wild riverine variety had the highest level of total oxalate (165.0 mg/100 g). These quantities are however far below documented toxic levels.
Key wordsPiper guineense Spice Proximate composition Minerals Antinutrients Ascorbate Varietal differences
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- 1.AOAC (1975) Official Methods of Analaysis. 12th ed. Washington, DC: Association of Official Analytical Chemists.Google Scholar
- 2.Dye WB (1956) Studies onHalogeton glomeratus. Weed 4: 55–58.Google Scholar
- 3.Oke OL (1965) Chemical studies on some Nigerian foodstuffs. W African Pharm 8: 92–95.Google Scholar
- 4.Burns RF (1971) Methods of estimation of tannin in the grain sorghum. Agron J 63: 511–515.Google Scholar
- 5.Croft AC (1979) The determination of total glucosinolates in rapeseed meal by titration of enzyme liberated acid: The identification of individual glucosinolates. J Sci Food Agric 30: 417–423.Google Scholar
- 6.Ifon ET (1977) Nutrient composition of some Nigerian leafy green vegetables and the physiological availability of their iron contents. Ph.D. Thesis. Biochemistry Department, University of Ibadan, Nigeria. pp. 20–120.Google Scholar
- 7.Leakey CL, Wills JB (1977) Food crops of the lowland tropics, 13th ed. Oxford University Press, pp. 101–123.Google Scholar
- 8.Eyo EJ, Mohme E, Abel HO (1983) Chemical composition and amino-acid contents ofGnetum africanum, Heinsia crinita, andPiper guineense. Nig J Nutri Sci 4(1): 57–62.Google Scholar
- 9.Oke OL (1969) Role of hydrocyanic-acid in nutrition. World Rev Nutri Dietet 11: 170–174.Google Scholar
- 10.Dietz HM (1989) Composition of foods: Glucosinolates in oil-seeds and vegetables: Their significance and methods of analysis. Food Lab News 16:31–35.Google Scholar
- 11.Munro A, Bassir O (1969) Oxalate in Nigerian vegetables. W African J Biol Appld Chem 12: 14–17.Google Scholar