FACULTY OF SCIENCE
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Item Ethnobotanical studies of anti-tuberculosis plants in Egbado, Ogun State, Nigeria(1999) Ashidi, J. S.; Gbile, Z. O.; Ayodele, A. E.Forty-five plant species and twenty-nine recipes used to treat tuberculosis in Egbado were identified. Prominent among these preparations were Garcinio kola Meckel, (Clusiaceae), Xylopia aelhiopica (Dunal) A. Rich. (Annonaccae), Musa nana Lour. (Musaceae), Anchomancs dijformis (BL.) Engl. (Araceae), Alchornea cordoifolia (Schuin. & Tlionn.) Muell. Arg. (Eupliorbiaceae), Allium ascalonicum Linn. (Liliaceae), Tetrapleura tetraptera (Sebum. & Tlionn.) Taub. (Mimosaccac). Olax subscorpinidca Oliv. (Olacaceac) and Piper guineense Sebum. & Thonn. (Piperaceae) suggesting their importance in the treatment. The need to screen the plants so identified especially those that have not been chemically and biologically studied is stressed.Item Foliar epidermal characteristics and preliminary phytochemistry of Ixora coccinea Linn, and ixora parviflora vahl.(Klobex Academic Publishers, 1999-06) Ayodele, A. E.; Gbadebo, J. O.Two ornamental species of ixora have been investigated morphologically and phytochemicaly. The leaves are oblong with acute apices and cordate bases In I. coccinea and elliptic with acuminate apices and obtuse bases In I. parviflora. The leaves are also larger in the latter. Epidermal cells are Isodlametric on the adaxial surfaces and irregular on the abaxial surfaces with curved anticlinal walls. Epidermal cells are larger In I parviflora. Paracytic stomata are found in both taxa while I. coccinea Is amphistomatic with the stomata on the adaxial surface restricted to areas around the midvein, I parviflora Is hypostomatic. A higher stomatal Index occurs In I. coccinea Trichomes which are restricted to the abaxial surfaces of the two taxa are simple, short, unicellular, peg-like or cone-like, and sometimes curved. Trichomes are, however, longer In I. parviflora Alkaloids, saponins and tannins are present in both taxa. Free or combined anthraqulnones and cardinc glycosides were not detectable in any of the species. An artificial key is present for the Identification of the two species.Item The morphology and ecology of the genus synsepalum (A.D.c.) Daniell (sapotaceae) in Nigeria(1999) Ayodele, A. E.; Chukwuka, K. S.The genus Synsepalum is represented by three species in Nigeria. It is confined to me lowland rainforest region of the country. Synsepalum dulcificum is called the 'miraculous' berry or the ‘magic plant’ on account of the protein based sweetening agent miraculin found in the pulp of the fruit. The plant also produces a fairly hardwood which is particularly used as firewood by the indigenous people while the twigs are used as chewsticks. S. stipulatum popularly called the "Blacksmiths' charcoal wood” is known to supply the best charcoal to the Benin blacksmiths. S. glycydorum is not of much economic importance to the people but it is restricted in its distribution to the Southeastern part of Nigeria. From the standpoint of uses and restricted distribution, there is need for in-situ and ex-situ conservation of these species for sustainable utilization. The largest leaves with the longest petioles are found in S. stipulatum, while the smallest leaves with the shortest petioles are in S. dulcificum . The leaves and petioles of S. glycydorum are intermediate of the other two species. The leaves generally are elliptic to oblong to oblanceolate in shape with acuminate apices. However, the apex in S. dulcificum may be acute, rounded or rarely retuse. The leaf bases in the genus are usually cuneate. The leaves are glabrous except in S. dulcificum which may be hairy oh the abaxial surface.Item Epidermal morphology of Nigerian species of synsepalum (sapotaceae)(1999) Ayodele, A. E.The leaf epidermal morphology of three Nigerian species of Synsepalum has been studied by light microscopy. Epidermal cells are Irregular or polygonal with straight, curved, undulate or sinuate anticlinal walls. All taxa are amphistomntic although adaxial stomata are restricted to the veins and their vicinities. Stomatal type varies in the genus. Anomocytic stomata are present on both leaf surface of S. dulcificum and S. stipulation while cyclocytic and paracytic types are recorded in S. glycydorum on the adaxial and abaxial surfaces respectively. The periclinal divisions in the abaxial guard cells of S. stipulatum is diagnostic of the species. All taxa are glabrous but numerous trichome bases are found on the abaxial surface of S. glycydorum suggesting an early loss of hairs in leaf development A dichotomous key for identifying the species is presented.Item Epidermal morphology of the genus dialium (fabaceae: caesalpinioideae)(1997) Sheteolu, A. O.; Ayodele, A. E.Epidermal morphology of adaxial and abaxial leaflet surfaces of the five species in the genus Dialium (Fabaceae : Caesalpinoideae) were studied by light microscopy. The epidermises are composed of cells which are isodiametric, irregular or both types in outline. Anticlinal walls are either straight, curved or undulate. Leaflets of all taxa are hypostomatic. Paracytic stomata occur in all species except D. guineense that posses both paracytic and staurocytic stomata. Other features of the epidermis that show variation include stomatal size and density, size and density of epidermal cells, and type, size, shape, frequency and basal cells of the trichomes. An indented, dichotomous key for identifying the species is presented.Item Environmental audit of the Tunu/Kanbo forests of the Niger Delta, Nigeria(1997-11) Chukwuka, K. S.; Ayodele, A. E.Item Environmental impact assessment of the rainforest vegetation in Agbara industrial estate, South Western Nigeria(1996) Chukwuka, K. S.; Ayodele, A. E.; Osonubi, O.The vegetation of Agbara industrial estate, South-western Nigerian was studied with a view to determining the floristic and structural composition before the full take off of the various industries. The area is lowland rain forest, drier - type with the major growth forms including trees, shrubs, palms and climbers. A total of 897 plants were enumerated in five transect of 2 km. Species diversity index for the area is in the range of 0.01 - 0.24 while dominance values range from 0.00 - 0.01. Tree density was estimated to be 56.1 stems per km sq. The study shows evidences of regrowth vegetation subsistence farming activities involving arable crops of previous land use. The area is also shown to have suffered previous encroachment or early succession. No particular species is dominant. It is suggested that adequate pollution control measures need to he put in place if the biotic communities of the estate are not to be endangered Resettlement of the inhabitants away from the vicinity of the operating industries is also proposed.Item Ethnobotany, conservation and sustainable development(1996) Ayodele, A. E.The current attempt to concentrate on medicinal plants as sources of drug is a welcome development which must be accompanied with adequate conservation strategies through research, education and training, ex-situ and in-situ conservation. Conservation is necessary if the dignity of life is to be maintained. However, plant taxonomy as a discipline particularly the aspect of floristic taxonomy, should serve as the ‘bedrock’ of any conservation strategy. Data from such studies which are well documented in efficient and well equipped herbaria in an easily retrievable manner will facilitate better coordinated effort at mapping out strategies for bio conservation and sustainable living. The setting up of Botanical and Zoological gardens is also crucial to conservation programmes. Taxonomists, conservation experts and policy makers must work in harmony and at more organised setting to provide solutions to conservation problems.Item Variation in fibres and vessel elements of delonix regia (caesalpiniaceae)(1993) Ayodele, A. E.; Pereira-Sheteolu, A. O.Variation in fibres and vessel elements of the secondary xylem of Delonix regia has been investigated by light microscopy. Tills work clearly establishes inter-positional variation in the dimensions, particularly of the fibres both axially and radially. Generally, the longest and widest fibres are recorded at the breast height of 1.39 m from the base of the plant. The widest but shortest fibres occur towards the pith while the thinnest but longest fibres are found towards the periphery. The widest and longest vessels are also found at the breast height of 1.30 m from the base of the plant. The importance of these variable characters in the taxonomy of the taxon is discussed.Item The morphology and ecology of the genus synsepalum (A.Dc) Daniell (sapotaceae) in Nigeria(Ecological Society of Nigeria, 1999) Ayodele, A. E.; Chukwuka, K. S.The genus Synsepalum is represented by three species in Nigeria. It is confined to the lowland rainforest region of the country. Synsepalum dulcificum is called the ‘miraculous’ berry or the 'magic plant' on account of the protein based sweetening agent miraculin found in the pulp of the fruit. The plant also produces a fairly hardwood which is particularly used as firewood by the indigenous people while the twigs are used as chewsticks. S. stipulatum popularly called the "Blacksmiths' charcoal wood" is known to supply the best charcoal to the Benin blacksmiths. S. glycydorum is not of much economic importance to the people but it is restricted in its distribution to the Southeastern part of Nigeria. From the standpoint of uses and restricted distribution, there is need for in-situ and ex-situ conservation of these species for sustainable utilization. The largest leaves with-the longest petioles are found in S. stipulatum, while the smallest leaves with the shortest petioles are in S. dulcifcum. The leaves and petioles of S. glycydorum are intermediate of the other two species. The leaves generally are elliptic to oblong to oblanceolate in shape with acuminate apices. However, the apex in S. dulcificum may be acute, rounded or rarely refuse. The leaf bases in the genus are usually cuneate. The leaves are glabrous except in S. dulcificum which may be hairy on the abaxial surface.