Vol.5 , No. 1, Publication Date: Feb. 12, 2018, Page: 26-31
[1] | Adeniyi Adeyeye, Department of Chemical Sciences, Oduduwa University, Ipetumodu, Via Ile–Ife, Nigeria. |
[2] | Olufunmilayo Deborah Ayodele, Department of Chemical Sciences, Oduduwa University, Ipetumodu, Via Ile–Ife, Nigeria. |
[3] | Gentle Akinwumi Akinnuoye, Department of Chemical Sciences, Oduduwa University, Ipetumodu, Via Ile–Ife, Nigeria. |
The proximate composition and mineral contents of six less common, edible leafy vegetables in Nigeria, including Solanum nodiflorum, Launaea taraxacifolia, Senecio biafrae, Cucurbita maxima, Crassocephalum crepidioides and Solanum nigrum have been reported in this study. Analysis was carried out using standard procedures of the AOAC. The moisture contents, an indication of the freshness of the vegetables, ranged between 89.25% in C. maxima and 91.64% in S. nigrum. The samples contained low protein, fat, ash, fibre and carbohydrate contents, with values ranging as follows: protein (minimum and maximum) 3.22% in C. crepidioides and 3.78% in S. nodiflorum, fat 0.58% in C. crepidioides and 0.77% in C. maxima, ash 1.15% in C. crepidioides and 1.28% in S. nodiflorum, fibre 1.44% in S. nigrum and 1.68% in S biafrae and carbohydrate 2.25% in S. nigrum and 3.92% in C. crepidioides respectively. The metal contents had their range of values (mg/kg) as calcium 1360–5985, magnesium 220–480, iron 24.70–40.60, manganese 2.30–7.29, copper 1.70–2.85, zinc 1.20–1.52 and cobalt 0.80–0.95 respectively. Nickel was below 0.01mg/kg in all samples. The values for lead and cadmium were below detection limits. The low fat, protein and carbohydrate contents, and hence low calorific energy values of the vegetables, qualify them to be ideal for consumption by all, especially the hypertensive, diabetics and the obese. Their consumption therefore becomes appropriate for strong and healthy living.
Keywords
Leafy Vegetables, Proximate Composition, Chemical Contents, Nutrient Contents, Mineral Elements
Reference
[01] | Mosha T. C. and Gaga H. E. (1999). Nutritive value of blanching on trypsin and chymotrypsin inhibitor activities of selected leafy vegetables. Plant Foods Human Nutr., 54: 271-283. |
[02] | Akinfolarin O. M. and Gbarakoro S. L. (2016). Proximate analyses of Atama (Heinsia crinita) and Editan (Lasianthera africana). IOSR J. Appl. Chem. 9: 3 (version I): 76-79. |
[03] | Emebu P. U. and Anyika U. (2011). Proximate and composition of Kale (Brassica oleracea) grown in Delta State, Nigeria. Pak. J. Nutr. 10: 190-194. |
[04] | Okigbo B. N. (1986). Broadening the Food base in Africa. The potential of traditional food plants. Food Nutrition. 1986. 12: 4-17. |
[05] | Orech F. O., Akenga T., Ochora J., Friis H. and Aagaard–Hassen J. (2005). Potential toxicity of some traditional leafy vegetables consumed in Nyang’oma Division, Western Kenya. Afri. J. Food Agric. Nutri. Devt. Online 5 (1). |
[06] | Adepoju O. T. and Oyewole E. O. (2008). Nutritional importance and micronutrient potentials of two non–conventional indigenous green vegetables from Nigeria. Agric. J. 3 (5): 362-365. |
[07] | Fowomola M. A. and Akindahunsi A. A. (2005). Protein quality indices of sandbox (Hura crepitans) seed. J. Food Agric. Environ. 3: 16-19. |
[08] | Yi–Fang C., Jie S., Xian–Hong W. U. and Rui–Hai (2002). Antioxidant and antiproliferative activities of common vegetables. A Review. J. Agric. Food Chem. 50: 6910-6916. |
[09] | Whitney E. N., Hamilton E. M. N. and Rolfes S. R. (1990). Understanding Nutrition (5th Edn), West Publishing Co., St. Paul, USA. |
[10] | Ayoola P. B., Adeyeye A. and Onawumi O. O. (2010). Trace element and major mineral evaluation of Spondias mombin, Vernonia amygdalina and Momordica charantia leaves. Pak. J. Nutri. 9 (8): 755-758. |
[11] | Adebawo O. O., Salau B. A., Adeyanju M. M., Famodu A. A. and Osilesi O. (2007). Fruits and vegetables moderate blood pressure, fibrinogen concentration and plasma viscosity in Nigerian hypertensives. Afri. J. Food Agric. Nutri. Develop. 7 (6): 1-12. |
[12] | Halliwell B. and Gutteridge J. M. (1989). Free radicals in biology and medicine. Clarendon Press, Oxford. |
[13] | Olaiya C. and Adebisi J. (2010). Phytoevaluation of the nutritional values of ten green leafy vegetables in South–Western Nigeria. The Internet J. of Nutrition & Wellness 9 (2). |
[14] | Asaolu S. S., Adefemi O. S., Oyakilome I. G., Ajibulu K. E. and Asaolu M. F. (2012). Proximate and mineral composition of Nigerian leafy vegetables. J. Food Res. 1 (3): 214-218. |
[15] | Adeniyi S. A., Ehiagbonare J. E. and Nwangwu S. C. O. (2012). Nutritional evaluation of some staple leafy vegetables in Southern Nigeria. Int. J. Agric. Fd. Sci. 2 (2): 37-43. |
[16] | Yekeen T. A., Akintaro O. I., Akinboro A. and Azeez M. A. (2013). Evaluation of cytogenotoxic and nutrient composition of three commonly consumed vegetables in South – Western Nigeria. Afri. J. Food Agric. Nutri. Develop. 13 (2): 7452-7466. |
[17] | Shittu S. A., Olayiwola O. A. and Adebayo O. R. (2014). Nutritional composition and phytochemical constituents of the leaves of Cnidoscolous aconitifolius. Am. J. Fd. Sci. Nutri. Res. 1 (2): 8-12. |
[18] | Arowosegbe S., Oyeyemi S. D. and Alo O. (2015). Investigation on the medical and nutritional potentials of some vegetables consumed in Ekiti State, Nigeria. Int. Res. J. Natural Sciences 3 (1): 16-30. |
[19] | Mohd A. M., Idris M. B. and Abdulrasheed A. (2016). The mineral composition and proximate analysis of T. occidentalis (Fluted Pumpkin) leaves consumed in Kano metropolis, northern Nigeria. Am. Chem. Sci. J. 10 (1): 1-4. |
[20] | AOAC. (2002). Official Methods of Analysis. 16th ed. Association of Official Analytical Chemists, Washington DC. |
[21] | FAO. (2002). Food energy: methods of analysis and conversion factors. FAO Ed., Rome. |
[22] | Ajala Lola (2009). The effects of boiling on the nutrients and anti–nutrients in two nonconventional vegetables. Pak. J. Nutrition 8 (9): 1430-1433. |
[23] | Dairo F. A. S. and Adanlawo I. G. (2007). Nutritional quality of Crassocephalum crepidioides and Senecio biafrae. Pak. J. Nutrition 2007. 6 (1): 35-39. |
[24] | Acho C. F., Zoue L. T., Akpa E. E., Yapo V. G. and Niamke S. L. (2014). Leafy vegetables consumed in Southern Cόte d’Ivoire: a source of high value nutrients. J. Animal & Plant Sciences 20 (3): 3159-3170. |
[25] | Adeleke R. O. and Abiodun O. A. (2010). Chemical composition of three traditional vegetables in Nigeria. Pak. J. Nutrition 9 (9): 858-860. |
[26] | Iheanacho K. and Ubebani A. C. (2009). Nutritional composition of some leafy vegetables consumed in Imo State, Nigeria. J. Appl. Sci. Environ. Manage. 13 (3): 35-38. |
[27] | Omale J. and Ugwu C. E. (2011). Comparative studies on the protein and mineral composition of some selected Nigerian vegetables. Afri. J. Fd. Sci. 5 (1): 22-25. |
[28] | Isa F. O,. Adesala S. O. and Ojo F. A. (2006). Effect of maturity on the nutritional composition of selected green leafy vegetables. Proceedings of the 30th Annual Conference of Nigerian Institute of Food Science and Technology, ASCON. Conference Centre, Badagry, Nigeria. |
[29] | Brosnan J. (2003). Inter-organ amino acid transport and its regulation. J. of Nutrition 133: 2068-2072. |
[30] | Mensah J. K., Okoli R. I., Ohaju-Obodo J. O. and Eifediyi K. (2008). Phytochemical, nutritional and medical properties of some leafy vegetables consumed by Edo people of Nigeria. African J. Biotech. 7 (14): 2304-2309. |
[31] | Akpanyung E. O. (2005). Proximate and mineral composition of bouillon cubes produced in Nigeria. Pak. J. Nutrition 4: 142-149. |
[32] | FNB. (2001). Food and Nutrition Board. Institute of Medicine. Dietary Reference Intakes for vitamins A & K, arsenic, boron, chromium, copper, iodine, iron, manganese, molybdenum, nickel, silicon, vanadium and zinc. Washington D. C. National Academy of Science. |
[33] | Idoko O., Emmanuel S. A., Aguzue O. C., Akanji F. T., Thomas S. A. and Osuagwu I. (2014). Phytochemical screening, proximate analysis and mineral composition of some leafy vegetables consumed in Nigeria. Int. J. Adv. Chem. 2 (2): 175-177. |
[34] | Odhav B., Beekrum S., Akula U. and Baijnath H. (2007). Preliminary assessment of nutritional values of traditional leafy vegetables in Kwazulu-Natal, South Africa. J. Food Composition & Analysis 20: 430-435. |
[35] | Glew R. S., Amoako-Atta B., Ankara-Brewoo G., Presly J., Chuang L., Millson M. and Smith R. (2009). Non-cultivated plant foods in West Africa: Nutritional analysis of the leaves of three indigenous leafy vegetables in Ghana. Food 3: 39-42. |
[36] | Umar K. J., Hassan L. G., Dangogo S. M., Maigandi S. A. and Sani N. A. (2001). Nutritional and anti-nutritional profile of spiny amaranthus (Amaranthus viridis Linn). Studia Universitatis “Vasile Goldis”, Sevia Stintele Vietii. 21 (4): 727-737. |
[37] | FAO/WHO. (2002). Report of a joint FAO/WHO Expert Consultation on human vitamin and mineral requiments. Expert Consultation, Bankok, Thailand. |
[38] | Chaturvedi V. C., Shrivastava R. and Upreti R. K. (2004). Viral infections and trace elements: A complex trace element. Current Science 87: 1536-1554. |
[39] | Trowbridge F. and Martorell M. (2002). Forging effective strategies to combat iron deficiency. Summary and recommendations. J. Nutri. 84: 875-880. |
[40] | Radwan M. A. and Salama A. K. (2006). Market basket survey for some heavy metals in Egyptian fruits and vegetables. Food Chem. Toxicol. 44: 1273-1278. |
[41] | Sobukola O. P., Adeniran O. M., Odedairo A. A. and Kajihausa O. E. (2010). Heavy metal levels of some fruits and vegetables from selected markets in Lagos, Nigeria. Afri. J. Food Sci. 4 (2): 389-393. |
[42] | Ujowundu C. O., Kalu F. N., Nwosunjoku E. C., Nwaoguikpe R. N. and Okechukwu R. I. (2011). Iodine and inorganic mineral contents of some vegetables, spices and grains consumed in Southeastern Nigeria. Afri. J. Biochem. Res. 5 (2): 57-64. |
[43] | Hussain J., Rehman N. U., Khan A. L., Hussain H., Al-Harrasi A., Ali L., Sami F. and Shinwari Z. K. (2011). Determination of macro and micronutrients and nutritional prospects of six vegetable species of Mardan, Pakistan. Pak. J. Bot. 43 (6): 2829-2833. |
[44] | Hashmi D. R., Ismail S. and Shaikh G. H. (2007). Assessment of the level of trace metals in commonly consumed edible vegetables locally available in the markets of Karachi city. Pak. J. Bot. 39 (3): 747-751. |
[45] | Ismail F., Anjum M. R., Mamon A. N. and Kazi T. G. (2011). Trace metal contents of vegetables and fruits of Hyderabad retail market. Pak. J. Nutri. 10 (4): 365-372. |
[46] | Barminas J. T., Charles M. and Emmanuel D. (1998). Mineral composition of non-conventional leafy vegetables. Plant Foods for Human Nutrition 53: 29-36. |