Botany Research Papers/Topics

Studies On The Degradation Of Testa Of Cocoa (Theobroma Cacao L .) By Aspergillus, Species Isolated From Mouldy Cocoa Beans

ABSTRACT Cocoa beans at the Toma Warehouses were found to be contaw minated with a tota l number o f 21 fungus sp ecies, the predominant species belonging to the genus A spergillus. The annual average contamination was 4,9 per centi Infection in the main crop was lower (3»9 per cent) than in the minor crop (6 ,4 per ce n t). The higher the bean moisture content the greater the fungal in fe ctio n . Extracts o f testa of fermenting cocoa beans depressed vegetative growth in Aspergillu s f la ...

STUDIES ON YERSINIOSIS IN HUMAN AND SELECTED ANIMAL POPULATIONS IN JOS AND ITS ENVIRONS

Yersinia enterocolitica and Yersinia pseudotuberculosis are important food and water borne pathogens that has recently emerged world wide. This study was aimed at characterizing the prevalence of Yersinia enterocolitica and Yersinia pseudotuberculosis in human and selected animal populations in Jos and its environment. Three thousand stool samples from human and selected animal species from 5 different locations in Jos and its environs were surveyed over a period of three years. Human s...

DYNAMICS OF FOREST AND THICKET VEGETATION ON THE ACCRA PLAINS, GHANA..

ABSTRACT Aspects of seasonal dynamics, population dynamics, and successional dynamics were investigated in three kinds of woody vegetation which occur on the Accra Plains: dry tropical forest, large thickets, and isolated clumps of thicket. Flowering, fruiting, foliage behaviour, and girth changes show a strong seasonal pattern in the study area; moisture deficits limit phenological activity within the community, although patterns vary among species. Synchrony was high within species in repro...

STUDIES OF LISTERIA MONOCYTOGENES (BACTERIUM) IN SOME SELECTED LOCAL GOVERNMENT AREAS OF PLATEAU STATE, NIGERIA

Studies were carried out on the distribution, characterization, pathogenicity and antibiotic susceptibility of Listeria monocytogenes in Six Local Government Areas of Plateau State, Nigeria. A total of One hundred and fifty (150) experimental samples were taken from each test Local Government Area. The isolation was carried out with the aid of cold enrichment, selective broth and selective Listeria agar. The experimental samples examined included: cow, goat, poultry, rabbit and sheep wa...

SCREENING FOR SOURCE-SINK POTENTIALS IN SOME SWEET POTATO (Ipomoea batatas(L.)Lam.) LINES IN JOS – PLATEAU, NIGERIA.

Fourteen (14) sweet potato (Ipomoea batatas(L.)Lam.) clones, TIS.8441, Ex Igbariam, TIS.86/0356, TIS.86/0306, TIS.2271, TIS.2532.OP.1.13, CIP 4400168, TIS.2544 Rusanya 1.5, TIS.82/0270.OP.1.85, TIS.82/0070.OP.120, TIS.8/637, NRCRI/UN/13, TIS.87/0087 and a farmer’s variety(Dan-Mangu), were screened during the cropping seasons of 2000 and 2001, to evaluate their yield potentials under the Jos-Plateau environment. The randomized complete block design was used with four replications. On t...

STUDIES ON THE MYCOFLORA AND SOME PHYSICAL CHARACTERISTICS OF GHANAIAN MAIZE (Zea mays L) VARIETIES AND THE EFFECT OF EXTRACTS OF ZANTHOXYLUM XANTHOXYLOIDES LAM AND KIGELIA AFRICANA BENTH ON

ABSTRACT Mycoflora of mixed maize grains and the newly developed Abeleehi and Obaatanpa varieties and airspora in the Warehouse o f the Ghana Food Distribution, GFDC, at Balduzzi, Kumasi have been studied under normal and simulated ambient Environmental Relative Humidities (ERH ’s) representative of the Ghanaian conditions. Some important physical and processing characteristics of £. and normal stackbumed white and yellow maize (seed water absorption, swelling index, 1000-seed weight, ferm...

TIE MORPHOLOGY AND ECOLOGY OF THE GENUS SYNSEPALUM (A.DC) DANIELL [SAPOTACEAE) IN NIGERIA

ABSTRACT The genus Synsepalum is represented by three species in Nigeria. It is confined to the lowland rainforest region of the country.

ECO-PHYSIOLOG-ICAL STUDIES ON PIST1A STuATlOTES. L. with sp eo ia l referenoe to i t s ooourrenoe on the Volta Lake in Ghana.

ABSTRACT The oreation o f the Volta Lake in Ghana provides favourable conditions fo r rapid weed growth,, The present report represents an attempt to in v e s t ig a te the in te ra c t ion between one o f the economically important weeds on the Lake, P is t ia s t r a t io t e s , L ., an  the physicochemical condition o f i t s environment in the f i e l d and laboratory, P is t ia is represented in most reaches o f the Lake but only sheltered bays and es tu arie s in the south are o...

THE STUDY OF THE MOTORS AFFECTING THE NATURAL RESISTANCE OF THE WOOD OF TERMINALIA IVORENSIS AGAINST TERMITE ATTACK

ABSTRACT The natural Radial and axial variations in the resistance of the wood of Termihalia ivorensis A* Chev, against damage by subterranean termites were investigated for two trees from the same locality- The damage was studied in relation to specific gravity, the modulus of elasticity, the cross-sectional area of vessels in the wood,, and the water soluble extractives. The correlation between termite damage and these physical, mechanical and anatomical properties have been reported. It wa...

MYCOTOXIN PRODUCTION AND MOLECULAR CHARACTERISATION OF Penicillium SPECIES ISOLATED FROM MILLET GRAINS (Pennisetum glaucum) (L.) R. Br.) IN SOUTHWESTERN NIGERIA

ABSTRACT Millet, a widely consumed food crop, is subject to fungal contamination during storage. These fungi produce mycotoxins in stored food products. Mycotoxins such as citrinin and ochratoxin produced by Penicillium species have been reported to be injurious to consumers. Knowledge of the fungi involved in the production of these mycotoxins will help in the control of its spread in food products. However, there is dearth of information on the mycotoxins produced by Penicillium on millet ...

BIOCULTURAL SIGNIFICANCE OF PLANT DIVERSITY IN THE AFADJATO COMMUNITY FOREST CONSERVATION AREA

Abstract The study was undertaken in the Afadjato Community Forest Conservation Area between August 2010 and June 2011 with the following objectives: 1. To document and analyse the diversity of plants in the Afadjato Community Forest Conservation Area. 2. To undertake a quantitative ethnobotanical study of traditional knowledge and plant use among local people living in the study area. 3. To explore the relationship between plant diversity and use; and 4. To determine the conservation and ec...

Studies on the Influence of Vesicular Arbuscular Mycorrhiza and Fertilization on Chili Pepper (Capsicum annuum L.) in Different Cropping Systems

ABSTRACT Investigations were conducted with four pot and two field experiments on the influence of vesicular arbuscular mycorrhiza (VAM), and fertilization on chili pepper, Capsicum annuum var. tatase (Yoruba) in different cropping systems. All experiments were factorial in a randomized complete block design (RCBD) and each treatment was replicated three times. The first two pot experiments carried out in the Department of Botany and Microbiology, University of Ibadan under natural solar il...

Studies on Antimicrobial Potentials of three Ganoderma species

ABSTRACT The fruit bodies of three Ganoderma species namely G. lucidium, G. applanatum and G. australe were collected from the decaying logs within the University of Ibadan Botanical Gardens .Invitro antagonistic effect of the ethanol, methanol and distilled water extracts of these macro fungi were tested against some disease causing microorganisms. Both crude and pure extracts of these Ganoderma species exhibited various degree of inhibition against the test organisms. The widest inhibitory...

Modelling of Heavy Metal Bioaccumulation of Eichhornia crassipes [MART.] SOLMS AND Pistia stratiotes L. in Ologe Lagoon, Lagos, Nigeria

ABSTRACT Macrophytes such as Eichhornia crassipes and Pistia stratiotes are known bioaccumulators found in the Ologe Lagoon which receives effluents mainly from Agbara Industrial Estate. However, the mechanism of heavy metal bioaccumulation by these macrophytes has not been fully understood. This study was designed to determine the mechanism of heavy metal bioaccumulation and model the phytoremediation capabilities of the macrophytes. Five sampling stations: Owo (before the point of dischar...

STUDIES OF TOXIGENIC AND ZOOPATHOGENIC FUNGI ASSOCIATED WITH THE SPOILAGE OF NIGERIAN POULTRY FEEDS

ABSTRACT Six species of known toxigenic and zoopathogenic fungi were isolated from Nigerian poultry feeds. These include Aspergillus flavus Link: Fr. (IMI 280819), A. fumiga tus Fres. (1M1 280822), ~ niger v. Tieghem (IM1 280823), A. oryzae (Ahlburg) Cohn (IM1 280831), Rhizopus arrhizus Fischer (1M1 280827) and Rhizomucor pusillus Lindt Schipper (1MI 280824). Growth-temperature range for the. fungi was between 15° and 45°C. Aspergillus fu~igatus and Rhizomucor pusillus are t he r mot o Le ...


121 - 135 Of 149 Results