EFFECTS OF STORAGE METHODS AND MYCOFLORA ON PROXIMATE COMPOSITION OF AFRICAN YAM BEAN (Sphenostylis stenocarpa Hochust ex Rich ) SEEDS
One of the limitations of African yam bean (AYB) (Sphenostylis sternocarpa) is poor storage ability due to the adverse effect of seed-borne fungi. This study was conducted to examine the effects of storage methods on nutritive composition of AYB seeds stored in three types of storage materials viz; jute bags, polypropylene bags and plastic bowls. Freshly harvested AYB seeds were stored in all the storage materials for 6 months using 2 × 3 factorial (2 AYB cultivars and 3 storage methods) in 3 replicates. The proximate analysis of the stored AYB seeds was carried out at 3 and 6 months after storage using standard methods. The temperature and relative humidity of the store room were recorded monthly. Seeds stored in jute bags gave the best values for crude protein (24.87%), ash (5.69%) and fat content (6.64%) but recorded least values for crude fibre (2.55%), carbohydrate (50.86%) and moisture content (12.68%) at the 6th month of storage. Temperature of the store room decreased from 32.9 ºC - 28.3ºC, while the relative humidity increased from 78% - 86%. Decreased incidence of field fungi namely: Rhizopus oryzae, Aspergillus flavus, Geotricum candidum, Aspergillus fumigatus and Mucor meihei was accompanied by increase in storage fungi viz: Apergillus niger, Mucor hiemalis, Penicillium espansum and Penicillium atrovenetum with prolonged storage. The study showed that out of the three storage materials, jute bag was more effective in preserving AYB seeds.
Abreu, L.A., Carvalho, M.L., Pinto, C.A., Kataoka, V.Y. and Silva, T.A. (2013). Deterioration of sunflower seeds during storage . Journal of Seed Science 35 (2):240- 247.
Aderiye, B. I. (2004). Contributory roles of microbes to human development. 10th Inaugural lecture, University of Ado Ekiti, Nigeria. pp. 11-36.
Alexopoulos, C.J., Mims, C.W. and Blackwell, M. (2007). Introductory mycology. 4th edition. Wiley India, New Delhi pp.869.
Amakoromo, E.R., Innocent - Adiele, H.C. and Njoku, H.C. (2012). Microbiological Quality of Yogurt-Like Product from African Yam Bean. National Science 10(6):6-9.
Ameh, G.I. (2007). Proximate and Mineral composition of Seed and Tuber of African Yam Bean, Sphenostylis stenocarpa (HOECHST. EX. A. RICH.) HARMS. Asset Series B 6 (1): 1-10.
Amusa,N. A., Kehinde, I. A. and Ashaye, O. A. (2002). Biodeterioration of the Africa Star Apple (Artocarpus communis) in storage and its effects on the nutrient composition. African Journal Biotechnology 1(2): 57-60.
Association of Official Analytical Chemists. (1998). Official Methods of Analysis. 16th edition. Association of Analytical Chemist Washington DC USA.
Barnett, H. I. and Hunter, B. B. (1998). Illustrated Genera of Imperfect Fungi 4th edition Burges Publishing Company, Minnesota.
Bankole,S.A., Ikotun, B. and Ekpo, E. J. A. (1999). Fungal deterioration of melon seeds stored in jute sacks and polyethelene bags in Ago-Iwoye, southwestern Nigeria. Mycopathologia 146: 135-146.
Bewley, J. and Black, M. (1985). Seeds: physiology of Development and Germination. Plenum Press, New York. 445pp.
Brough, S.H., Taylo, A.J., Azam-Ali, S.N. (1993). The potential of Bambara groundnut (Vigna subterranean) in vegetable milk production and basic protein functionality systems. Food Chemistry 47: 277-283.
Chrastill, J. (1990). Chemical and Physiochemical changes of rice during storage at different temperature. Journal of cereal Science, 11: 71- 85.
Copeland, L.O. and McDonald, M.B. (1999). Principles of seed science and technology. Kluwer Academic publishers group, Dordrecht. p181-220.
Ekpenyong, T. E. and Borchers, R. L. (1978). Proceedings of the 1st International