Comparative morphology of leaf epidermis in the genus Ipomoea (Convolvulaceae) in Southern Nigeria

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Bolarinwa, K. A.
Oyebanji, O. O.
Olowokudejo, J. D.
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West University of Timisoara
Leaf epidermal morphology of eight species of Ipomoea found in Southern Nigeria has been studied using light microscope. Epidermal characters such as stomata type, epidermal cell type, anticlinal wall patterns, trichomes, presence of glands, stomata number and size, epidermal cell number and size, cell wall thickness, gland number and gland length vary within and amongst the species. The cells of adaxial and abaxial epidermises are polygonal or irregular with straight, sinuous or curved anticlinal wall pattern. Stomata are present on both adaxial and abaxial surfaces. Stomata complex is paracytic except in I. asarifolia and I. purpurea where its staurocytic; stomata index is higher on the abaxial side while trichome is absent on the abaxial surface of I. cairica and I. purpurea, likewise on the adaxial surface of I. involucrata. Glands are observed in all the species. Interspecific variation was further revealed in the quantitative micromorphology characters of Ipomoea species studied which was statistically supported at p<0.001 significance level. The taxonomic significance of these features in identification and elucidation of species affinity is discussed.
Ipomoea , epidermal cell , stomata type , taxonomy , quantitative and qualitative characters
Bolarinwa, K. A., Oyebanji, O. O. and Olowokudejo, J. D. (2018). Comparative morphology of leaf epidermis in the genus Ipomoea (Convolvulaceae) in Southern Nigeria Annals of West University of Timişoara, ser. Biology 21: 29-46