FACULTY OF SCIENCE

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Author: search.filters.author.Ayodele, A. E.Subject: search.filters.subject.Biology

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    The pollen morphology of Nigerian bignoniaceae Juss
    (2007) Ugbabe, G. E.; Ayodele, A. E.; Okogun, J. I.; Inyang, U. S.
    The Pollen grains of eleven species of the Bignoniaceae represented in Nigeria have been studied by the light Microscope. The pollen grains are mostly circular or elliptic. The circular ones include those of Crescentia cujete Linn. Markhamia tomentosa (Benth.) K.Schum., Newbouldia laevis Seem., Oroxyllum indicum Vent., Spatliodea campanulata P.Beauv., Stereospermum acuminatissimum K.Schum., Stereospermum kunthianum Cham., and Tabebuici rosea (Berthol) DC. while the Elliptic ones are: Kigali a africana (Lam) Benth., Markhamia litlea (Benth.) K.Schum. and Tecoma stans (Linn ) H.B & K. and the shape/class range from prolate, sub-prolate to prolate spheroidal. The Prolate ones are Kigelia africana, Markhamia tomentosa, and Tecoma stans; the Subpralate types includes those of Crescentia cujete, Markhamia lutea, OroxyUum indicum. Spathodea campanulata and Stereospermum acuminatissimum; while the Prolate-Spheroidal types are those of Stereospermum kunthianum and Tabebuia rosea. They are either tefra- colporate or tri-colporate. The pollen of Crescentia cujete is Tetra-Colporaie while tiic others are Tri-colporate (Tri-colporate = Pollen grains with three ectocolpi;). The different pollen types are useful in the identification of the Nigerian Bignoniaceae.
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    Morphological studies in lycopersicon esculentum Mill. lines in Southwestern Nigeria
    (Asian Network for Scientific Information, 2007) Lawal, O. J.; Ayodele, A. E.; Chukwuka, K. S.
    Morphological studies of thirty lines of Lycopersicon esculentum Mill were carried out in order to find out characters, which may be used for the delimitation of the cultivars in Nigeria. The quantitative and qualitative characters studied include leaf type, leaf length, leaf shape, leaf breadth, petiole length, number of leaves per plant, number of leaflets per leaf, number of serration per leaflet days taken for germination, days taken for first picking, stem diameter, fruit diameter, fruit shape, fruit colour, stem type, stem colour, stem texture, leaf arrangement and growth habit. Morphological characters that indicate close affinity amongst the cultivars include leaf type, leaf base, leaf shape, leaf apex, leaf margin, leaf arrangement stem colour, fruit colour, number of calyx and corolla. However, the features that are taxonomically relevant in the delimitation of lines of L. esculentum are fruiting habit, fruit shape and presence or absence of ridges on the fruits. The three cultivars recognized are Ibadan local, hybrid and Roma VF. Numerical analysis of the qualitative and quantitative characters data using cluster analysis-average linkage, single linkage, complete linkage and centroid method delimit all the thirty lines into three major groups which conform to the results of the morphological analysis.
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    The morphology and preliminary phytochemistry of albizia saman (jacq.) F. mull
    (Klobex Academic Publishers, 2003-12) Ayodele, A. E.; Ibidun, D. K.; Ogunshe, A. A. O.
    The morphology and phytochemistry of Albizia saman have been investigated. The leaflets are elliptic to oblong with attenuate to obtuse bases. The leaf apex is obtuse while the surface is glabrous with an entire margin. Epidermal cells are irregular to polygonal with straight to curved anticlinal walls on the adaxial surface. On the abaxial surface, the cells are polygonal with straight to slightly curved anticlinal walls. The leaves are hypostomatic with nnomocytic stomata. Trichomes are simple, unscriate and restricted to the abaxial surface of the leaf. Pollen grains arc large and stibprolate occurring either as monads occasionally or as polyads in most cases. Photochemical screening revealed the presence of alkaloids, cardiac glycosides and saponins in the leaf.
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    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.