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Mycoflora within black plum (Vitex doniana sweet) fruits

  • Raphael Nnajiofor Okigbo (a1)

Abstract

Introduction. Black plum (Vitex doniana sweet) is a plant widely used by various communities in Nigeria for many purposes, including production of wine and jam. Ripe mature black plum fruit for food use commonly collected from the ground instead of plucked which is more hygienic. An investigation was conducted to find out the mycoflora on the surface and within the fruits of black plum fruits. Materials and methods. Mycoflora associated with the surface, skin, pulp and juice of healthy intact fruits of black plum was isolated in malt extract agar and potato dextrose agar and identified. Pathogenicity test was carried out with three pathogens of the fruit. Results and discussion. Fungi with incidence of 20-100% of occurrence were classified as major components and those below 20% of occurrence were regarded as minor components. Yeasts making up the major components in the ripe fruits were Saccharomyces cerevisiae and Candida albicans, while the minor yeast components were Rhodotrula sp., S. coreanus and Pichia sp. Filamentous fungi constituting major components were Aspergillus niger and Penicillium sp. whereas minor components were Botryodiplodia theobromae and Penicillium chrysogenum. Spoilage of fruits was caused by B. theobromae, Aspergillus sp. and A. niger. Conclusion. Yeasts and, occasionally, filamentous fungi occur within apparently healthy fruits of Vitex doniana sweet. Stages of development when the yeasts enter the pulp of the fruit need to be thoroughly investigated.

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[1] Keay R.W.J., Onochie C.F.N., Stanfield D.P., Nigerian trees II, Federal Department of Forest Research, Ibadan, Nigeria, 1964, pp. 432-434.
[2] Nielsen M.S., Introduction to the flowering plants of West Africa, Univ. London Press Ltd., London, 1965.
[3] Okigbo R.N., Microflora and the production of wine from Vitex doniana sweet, thesis, Univ. Benin, Nigeria, 1988, 100 p.
[4] Anonymous, Post harvest food losses in developing countries, Natl. Acad. Sci., Washington, D.C., USA, 1978.
[5] Ekundayo, C.A., Okigbo, R.N., The effect of pathogenic fungi on the nutritional value of the black plum (Vitex doniana), Nigeria J. Bot. 4 (1991) 61-68.
[6] Alabo A.A., Utilization of black plum (Vitex doniana) fruit in jam production, in: Elemo G.N. (Ed.), Proceedings 23 $^{{\rm rd}}$ Annual Nigerian Institute of Food Science and Technology Conference, Raw materials and Development Concil, Maitama, Abuja, Nigeria, 25-27 October 1999, pp 270-272.
[7] Okigbo, R.N., Emoghene, A.O., Osuinde, M.I., Fermentation of black plum (Vitex doniana sweet) for production of wine, Nigerian J. Sci. Environ. 1 (1998) 69-76.
[8] Allen, E.K., Allen, C.N., Biochemical and symbiotic properties of the Rhizobia, Bacterial. Rev. 14 (1950) 273-330.
[9] Tervet, J.W., Hollis, J.P., Bacteria in the storage organs of healthy plants, Phytopathology 38 (1948) 960-967.
[10] Hollis, J.P., Bacteria in healthy potato tissue, Phytopathology 41 (1951) 350-366.
[11] Samish, Z., Dimant, D., Bacterial population in fresh healthy cucumbers, Food manuf. 34 (1959) 17-20.
[12] Lodder J., The yeasts. A taxonomic study, 2 $^{{\rm nd}}$ ed., North-Holland Publishing Company, Amsterdam, London,1971.
[13] Barnett H.L., Hunter B.B., Illustrated genera of imperfect fungi, 3 $^{{\rm rd}}$ ed., Burges Publishing Company, Minnesota, USA, 1972.
[14] Raper K.B., Fennel D.I., The genus Asper-gillus, Robert E., Krieger Publishing company, New York, USA, 1973.
[15] Arx J.A.V., The genera of fungi sporulating in pure culture, Strau and Cramer GHH, Germany, 1974.
[16] Dade H.A., Gunnel J., Class work with fungi, Commonwealth Mycological Institute, Kew Surrey, England, 1969.
[17] Faparusi, S.I., Yeasts associated with cocoa pods, Rev. Microbiol. 5 (3) (1974) 51-53.
[18] Camango, R., Phaff, H.J., Yeast occurring in drosophila flies and in fermenting tomato fruits in Northern California, Food Research 22 (1957) 367-372.
[19] Marshall, C.R., Walkey, V.J., Some aspects of microbiology applied to commercial apple juice production, I. Distribution of microorganisms on the fruit, Fruit Res. 16 (1951) 448-456.

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Mycoflora within black plum (Vitex doniana sweet) fruits

  • Raphael Nnajiofor Okigbo (a1)

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