Chinelo A. Ezeabara^*, C. U. Okeke, J. E. Amadi, A. I. Izundu, Bibian O. Aziagba, P. T. Egboka, C. D. Udechukwu

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Department of Botany, Nnamdi Azikiwe University, Awka, Nigeria.
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Abstract: Comparative morphological study of five varieties of Colocasia esculenta (L.) Schott present in Anambra State, Nigeria was carried out, in order to furnish plant taxonomists with information which could be of great help in delimitation of the varieties. Significant difference was established at p < 0.05. The result showed that adaxial surface of “kochuo” had a purplish dot on the centre, abaxial leaf surface had a conspicuous purplish colour at the point of attachment to the leaf, and the cormels had numerous striking vertical purple stripes on the surface. There was presence of foliaceous (leaf-like) appendages at the veins of the abaxial surface of the leaf of “ogeriobosi”. The leaf length ranged from 35.6 ± 7.70 cm (“kochuo”) to 49.9 ± 3.55 cm (“ogeriobosi”). Petiole length of “ogeriobosi” was the highest (63.3 ± 3.83 cm), whereas the least was Colocasia esculenta var. antiquorum (26.67 ± 2.20 cm). The corm length ranged from 4.10 ± 0.10 cm (Colocasia esculenta var. antiquorum) to 8.60 ± 0.35 cm (“ogeriobosi”), while the cormel length ranged from 3.70 ± 0.96 cm (Colocasia esculenta var. antiquorum) to 7.03 ± 0.36 cm (“ogeriobosi”). This work has revealed diagnostic and differential morphological characters, which could be useful for identification and description of varieties of C. esculenta. In addition, it provided additional information which might be helpful in resolving the on-going controversy in the taxonomy of Colocasia, which would, in turn, probably lead to possible delimitation of C. esculenta.

Keywords: Colocasia, Corms, Cormels, Diagnostic Characters, Foliaceous Appendages, Morphological Characters, Plant Taxonomy

Cite this paper: A. Ezeabara, C. , Okeke, C. , Amadi, J. , Izundu, A. , Aziagba, B. , Egboka, P. and Udechukwu, C. (2015) Morphological Comparison of Five Varieties of Colocasia esculenta (L.) Schott in Anambra State, Southeastern Nigeria. American Journal of Plant Sciences, 6, 2819-2825. doi: 10.4236/ajps.2015.618278.

References

[1]   Aiyeloja, A.A. and Bello, O.A. (2006) Ethnobotanical Potentials of Common Herbs in Nigeria: A Case Study of Enugu State. Educational Research and Review, 1, 16-22.

[2]   Nyananyo, B.L. (2006) Plants from the Niger Delta. Onyoma Research Publications, Port Harcourt, 403 p.

[3]   Okujagu, T.F. (2008) Medicinal Plants of Nigeria; South East Zone, Vol. 1. Lisida Consulting, Lagos, 204 p.

[4]   United States Department of Agriculture (2013) Taxon: Colocasia esculenta (L.) Schott. National Germplasm Resources Laboratory, Beltsville, 5 p.

[5]   Gomez-Beloz, A. and Rivero, T. (2006) Ure (Colocasia esculenta Araceae): An Edible Aroid of the Warao. Ethnobotany Research and Applications, 4, 103-111.

[6]   Brooks, F. (2001) Crop Profile for Taro in American Samoa. ASCC Land Grant Program, Pago, 15 p.

[7]   Manner, H.I. (2011) Farm and Forestry Production and Marketing Profile for Tannia (Xanthosoma spp.). In: Elevitch C.R., Ed., Specialty Crops for Pacific Island Agroforestry, Permanent Agriculture Resources (PAR), Holualoa, 1-16.

[8]   Acevedo-Rodriguez, P. and Strong, M.T. (2005) Monocots and Gymnosperms of Puerto Rico and Virgin Islands. Contribution from the United National Herbarium, Volume 52, 1-415.

[9]   Cholastova, T. and Knotova, D. (2012) Using Morphological and Microsatellite (SSR) Markers to Assess the Genetic Diversity in Alfalfa (Medicago sativa L.). World Academy of Science, Engineering and Technology, 69, 856-862.

[10]   Sharma, O.P. (1993) Plant Taxonomy. Tata McGraw-Hill Publishing Company Limited, New Delhi, 482 p.

[11]   Singh, G. (2004) Plant Systematics. 3rd Edition. Oxford IDH Publishing Co Pvt. Ltd., New Delhi, 598 p.

[12]   Illoh, H.C., Oladipo, O.T. and Adedeji, A.A. (2011) Comparative Systematic Foliar Morphological and Anatomical Studies of Three Cleome (Linn.) Species in Nigeria. Nigerian Journal of Botany, 24, 17-42.

[13]   Udealor, A. and Ezulike, T.O. (2011) Evaluation of Different Crop Species for Compatibility with Cocoyam Minisett. Nigerian Journal of Plant Protection, 25, 122-129.

[14]   Ugwuaja, F.N. and Chiejina, N.V. (2011) Preliminary Investigation of the Causes of Leaf Rot of Cocoyam in Nsukka Zone of Nigeria. Nigerian Journal of Plant Protection, 25, 203-213.

[15]   Alege, G.O., Akinyele, B.O., Ayodele, S.M. and Ogbode, A.V. (2011) Taxonomic Importance of the Vegetative and Pod Characteristics in Three Nigerian Species of Sesame. African Journal of Plant Science, 5, 213-217.