Preliminary Investigation on Flowering and Fruiting Pattern in a Plantation Grown Afzelia africana Sm Stand in Umuahia, Nigeria

Abstract

Research work on the improvement and breeding of indigenous hardwood species in Nigeria started about four decades ago. Such studies prove to be fruitful in planning various conservative programme specific to different habitats. The present preliminary study focuses on the flowering and fruiting pattern of a 5 year old Afzelia africana artificial forest at Eastern Research Station, Umuahia, Abia State, Nigeria. The parameters observed were phenology, flowering intensity, floral biology, fruit set and floral visitors. Flowering was first observed in 2012 (three years after planting) and subsequently in 2014 (five years after planting), although no fruit was set until 2014. All the processes of flowering to fruiting took place between January to August, with flowering peak occurring in March. The flowering intensity was very low, ranging among 286, 138, and 54, with a very low flower to fruit ratio. It is presumed that the relative young age of the trees and reduced population size amongst other probable factors may have accounted for this observation. This study is the first record of flowering and fruiting pattern of this species at plantation level in Nigeria. By late July/August, matured fruits were ready for harvest.

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Ariwaodo, J. and Harry-Asobara, J. (2015) Preliminary Investigation on Flowering and Fruiting Pattern in a Plantation Grown Afzelia africana Sm Stand in Umuahia, Nigeria. American Journal of Plant Sciences, 6, 219-227. doi: 10.4236/ajps.2015.61025.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1] Keay, R.W.J. (1989) Trees of Nigeria. Revised Edition, Clarendon Press, Oxford.
[2] Arbonnier, M. (2002) Trees, Shrubs and Lianas of West African Dry Zones. CIRAD Margraf Publ. GmBH.
[3] Bawa, K.S. (1974) Breeding System of Tree Species of a Lowland Tropical Community. Evolution, 28, 85-92. http://dx.doi.org/10.2307/2407241
[4] Bawa, K.S. (1977) The Reproductive Biology of Cupania guatemalensis Radik (Sapindacease). Evolution, 31, 52-63. http://dx.doi.org/10.2307/2407544
[5] Bawa, K.S., Perry, D. and Beach, J.H. (1985) Reproductive Biology of Tropical Lowland Rainforest Tree (1): Sexual Systems and Incompatibility Mechanism. American Journal of Botany, 72, 331-345.
http://dx.doi.org/10.2307/2443526
[6] Oni, O. (1985) Patterns of Flowering and Pollen Viability Studies in Obeche Triplochiton scleroxylon K. Schum. M.Sc Thesis, University of Ibadan, Ibadan, 98.
[7] Gopalakrishnan, K.K. and Thomas, T.D. (2014). Reproductive Biology of Pittosporum dasycaulon Miq., (Family Pittosporaceae) a Rare Medicinal Tree Endemic to Western Ghats. Botanical Studies, 55, 15. http://dx.doi.org/10.1186/1999-3110-55-15
[8] Otegbeye, G.O. and Oje, S.O. (1995) Seed Collection and Handling Activities of Savannah Forestry Research Station, Seed Section, Nigeria. Forest Genetic Resources, No. 23, FAO, Rome, 9-13.
[9] Okeke, A.I., Asiegbu, J.E. and Ariwaodo, J.O. (1995) The Effect of Spacing on the Growth and Yield of Pinus caribea Morlet and Gmelina arborea Roxb in a Pine: Gmelina Mixed Plantation. Nigerian Journal of Forestry, 1-2, 75-82.
[10] Kavanagh, K. and Carleton, T.J. (1990) Seed Production and Dispersal Patterns in Populations of. Liriodendron tulipifera at the Northern Edge of Its Range in Southern Ontario Canadian. Canadian Journal of Forest Research, 20, 1461-1470. http://dx.doi.org/10.1139/x90-193
[11] Delanoe, O., Montmollin, B. and de Olivier, L. (1996) The IUCN/SCC Mediterranean Islands Plant Specialist Group-Conservation of Mediterranean Island Plants. Strategy for Action Gland, Switzerland IUCN, Gland.
[12] Wafai, B.A., Siddique, M.A.A., BeighShowket, Y. and Dar, N.A. (1996) Reproductive Biology of Patris (Aconitum heterophyllum Wall. ex. Royle; Ranunculaceae) an Important Rare and Threatened Himalayan Drug Plant. HUF-IUFRO International Workshop on Prospects of Medicinal Plants, Y.S. Parmer, University of Agricultural Sciences, Solan, H.P., India.
[13] Mandujano, M.C., Carrillo-Angeles, I., Mart1nez-Peralta, C. and Golubov, J. (2010) Reproductive Biology of Cactaceae. In: Ramawat, K.G., Ed., Desert Plants, Springer-Verlag, Berlin, 197-230.
http://dx.doi.org/10.1007/978-3-642-02550-1_10
[14] Westerkamp, C. (1991) Honey Bees Are Poor Pollinators—Why? Plant Systematics and Evolution, 177, 71-75. http://dx.doi.org/10.1007/BF00937827
[15] Kearns, C.A. and Inouye, D.W. (1997) Pollinators, Flowering Plants and Conservation Biology. BioScience, 47, 297-307.
[16] Stanley, R.G. and Linskens, H.F. (1974) Pollen: Biology Biochemistry and Management. Springer, Berlin. http://dx.doi.org/10.1007/978-3-642-65905-8
[17] Dudash, M.R. and Fenster, C.B. (2000) Inbreeding and Out-Breeding Depression in Fragmented Populations. In: Young, A. and Clarke, G., Eds., Genetics, Demography and Viability of Fragmented Populations, Cambridge University Press, Cambridge, 35-53.
http://dx.doi.org/10.1017/CBO9780511623448.005
[18] Lamont, B.B., Klinkhamer, P.G.L. and Witkowski, E.T.F. (1993) Population Fragmentation May Reduce Fertility to Zero in Banksia Goodie—A Demonstration of the Allee Effect. Oecologia, 94, 446-450. http://dx.doi.org/10.1007/BF00317122
[19] Hermanutz, L., Innes, D., Denham, A. and Whelan, R. (1998) Very Low Fruit: Flower Ratios in Grevillea (Proteaceae) Are Independent of Breeding System. Australian Journal of Botany, 46, 465-478. http://dx.doi.org/10.1071/BT97046
[20] Dorken, M.E. and Eckert, C.G. (2001) Severely Reduced Sexual Reproduction in Northern Populations of a Clonal Plant, Decodon verticillatus (Lythraceae). Journal of Ecology, 89, 339-350.
[21] Xie, C.Y., Dancik, B.P. and Yeh, F.C. (1991) The Mating System in Natural Populations of Thuja orientalis. Canadian Journal of Forest Research, 21, 333-339. http://dx.doi.org/10.1139/x91-041
[22] Lee, S.L. (2000) Mating System Parameters of Dryobalanops aromatic Gaertn. f. (Dipterocarpaceae) in Three Different Forest Types and a Seed Orchard. Heredity, 85, 338-345.
http://dx.doi.org/10.1046/j.1365-2540.2000.00761.x
[23] Ibidapo, V.O. (2004) Preliminary Study of Some Phenological Characters of Afzeliaafricana FRIN, Seminar Series, April 28.
[24] Albrechor, J. and Oloo, W.O. (1993) Kenya Forestry Seed Centre: A Project Concept and Its Contribution towards Development. Forest Genetic Resources Information No. 21, FAO, Rome, 10-17.

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