FACULTY OF SCIENCE

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    Scanning electron microscopy of leaves in the West African polygonaceae
    (2008-12) Ayodele, A. E.; Zhou Z. K.
    The leaf surfaces of the West African taxa of the Polygonaceae were studied using the Scanning Electron Microscope (SEM). Leaf epidermal cells arc polygonal, isodiametric and rarely irregular. Anticlinal walls are straight, curved, undulate or sinuate. Striae are present in a few taxa such as Polygonum plebeium. Rumex abysinaicus, R. bequaertii, Oxygonum sinuatum, Persicaria nepalensis and Afrobrunnichia erecta. The striae may be parallel, radiate, or randomly distributed. Trichomas are unicellular, uniseriate, aggregating together in some species of persicaria, while they may be flagelliform, interwoven and woolly in Persicaria senegalensis forma albotomentosa hence diagnostic for the species. Peltate glands are characteristic of A. arena. Stomata are mainly paracytic or anomocytic although diacytic. cyclocytic and anisocytic types may also be found in some taxa sometimes together with the main types. Stoma’s are sunken in a few species such as Polygonum plebeium and Persicaria attenuata subsp. pulchra, raised or at the same level with epidermal cells in other taxa. Wax deposits arc associated with the stomata in Persicaria attenuata subsp. africana. These characters are discussed in relation to the taxonomy of the family in West Africa.
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    SEM study on morphology and surface topography of wenyonia minuta woodland 1923 (cestoda: caryophyllidea) and the histopathological consequences on synodontis filamentosus (boulenger, 1901) from Lekki Lagoon, Lagos - Nigeria
    (2015) Akinsanya, B.; Hassan, A. A.; Adeogun, A. O.
    The SEM study on m orphology and surface topography of Wenyonia minuta was undertaken. The parasite was recovered from the intestine of Synodontis filamentosus. A total of two hundred and forty fi ve specimens of the fish host were exam ined.The fem ale specim ens (n =88) has a prevalence of 69.3% while the male specimens (n = 157) had a lower prevalence of 46.4%. The SEM description of the caryophyllidea cestode revealed the scolex to be fluke - like with four shallow longitudina l groove and flat pointed anterior end. The overall length of the scolex is 104250.97pm with a breadth of 653451.20pm .The furrow longitudinal groove were only observed on the dorsal side of the scolex. External protuberances were also reported in this study. The histopathological analysis shows m atting, lym phocytic infiltration of the lamina propria, goblet cell hyperplasia while some sections with no significant pathological changes were also observed