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Articles by I.O. Ezeibekwe
Total Records ( 4 ) for I.O. Ezeibekwe
  F.N. Mbagwu , C.I.N. Unamba and I.O. Ezeibekwe
  Leaf anatomical characteristics of five variants (A-E) of the genus Viscum (Loranthaceae) were investigated in this study to ascertain the usefulness of these characters and determine the intervariant relationships among the investigated variants. The anatomical features of the leaves showed that these variants possess useful biosystematic characters that can be used to establish intervariant relationships among investigated variants. An interesting aspect of this study is the presence of calcium oxalate crystals inside the chloroplast of variant A, C and D, which differ from the usual localization of crystals in the mesophile of leaves. Also, the presence of uniseriate epidermal cells observed in variants B and C which differ from the multiseriate epidermal cells in A, D and E coupled with the sunken stomata that characterized both variants are discussed in relation to their biosystematic significance.
  I.O. Ezeibekwe , M.I. Opara and F.N. Mbagwu
  Investigations were carried out to test the potency of Aloe vera gel extract on fungal organisms associated with yam rot. These fungi were isolated and identified as Fusarium oxysporium Schlech ex. Fr., Rhizopus oryzae, Went, Botryodiplodia theobromae Pat and Fusarium solani. Mart sacc. Pathogenicity test was carried out to confirm these organisms as the pathological agents of the yam rot. The Aloe vera gel at the different concentrations of 25, 50 and 100% did not inhibit the growth of these fungi when tested for its antifungal potency, p = 0.05. The result of this study showed that Aloe vera gel did not actually inhibit fungal growth as the there was progression in the growth and development of the fungi.
  I.O. Ezeibekwe , C.L. Ezenwaka , F.N. Mbagwu and C.I.N. Unamba
  Studies were carried out with the aim of evaluating in vitro the effects of growth regulators-auxin (NAA) and cytokinin (BAP) combined at different levels on Dioscorea rotundata regeneration potentials on modified Murashige and Skoog media. Concentrations of 0, 0.25, 0.5, 0.75, 1.00 mg L-1 and 0, 0.1, 0.2, 0.3 and 0.4 mg L-1 of NAA and BAP, respectively were used to subculture healthy white yam plantlets. The plant height, number of leaves, nodes, vines, roots and fresh weights were evaluated. Results obtained when analyzed at 5% level of significance showed that the concentration of both hormones (auxin and cytokinin) had significant effects on plant regeneration. BAP (0.2 mg L-1) in combination with NAA (0.5 mg L-1) showed more increase in almost all the parameters measured when compared to other concentrations combined.
  I.O. Ezeibekwe and A.E. Ibe
  Pathological investigations were carried out at Owerri, Imo State, Nigeria to find out the fungal organisms associated with yam rot. The following organisms were isolated and identified as Fusarium oxysporium Schlech ex. Fr., Rhizopus oryzae Went, Botryodiplodia theobromae Pat. and Fusarium solani Mart Sacc. Pathogenicity test carried out confirmed these organisms as the pathological agents of the yam rot.
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