Research Papers/Topics in Graduate Studies

Endogenous Levels Of Cytokinins In Ageing Cucumber Cotyledons

ABSTRACTENDOGENOUS LEVELS OF CYTOKININS IN AGEINGCUCUMBER COTYLEDONSJohn A.G. Poku, M.Sc.University of Guelph, 1974Supervisor:Professor R.A. FletcherThere are several procedures for isolating cytokinins whichinvolve a number of steps including extraction, solvent fractionationand column or paper chromatography. Various combinations of theseprocedures were tried in an attempt to isolate cytokinins from cucumbercotyledons. It was found that with this tissue it was preferable toomit a few steps ...

Production Of Potato (Solanum Tuberosum L) Pre-Basic Seed Through Tissue Culture In Katibougou, Mali

ABSTRACT In Mali, the main problems limiting the productivity and production of potatoes is the nonavailability of quality seeds in adequate quantities and at affordable prices for the farmers. To meet quantity and quality requirements for potato seeds in Mali, this study proposes to undertake two experiments to improve the techniques adopted in the IPR/IFRA plant biotechnology laboratory in Mali. The evaluation of the effects of three (3) concentrations of coconut water and two (2) conc...

The Effect Of Plant Water Potential On Nitrogen Fixation Of Soybeans

THE EFFECT OF PLANT WATER POTENTLAL ON NITROGEN FIXATION OF SOYBEANS John Nene-Osom Azu, M.Sc. Supervisor: University of Guelph, 1975 Professor J.W. Tanner Field experiments at two sites, Elora and Arkell,were conducted to investigate the effect of plant water potential on the nitrogen fixation of two soybean cultivars, Vansoy and Anoka. The treatments were Vansoy and Anoka both under irrigated and non-irrigated conditions. The acetylene reduction technique was employed to estimat...

Integrated Control Of The Alfalfa Weevil, Hypera Postica (Gyllenhal) (Coleoptera: Curculionidae), In Ontario

ABSTRACTINTEGRATED CONTROL OF THE ALFALFA WEEVIL, HYPERA POSTICA(GYLLENHAL) (COLEOPTERA: CURCULIONIDAE), IN ONTARIOJohn F. Abu, Ph.D. Supervisor:University of Guelph, 1976 Professor C.R. EllisThe distribution of the established parasitoids of the alfalfaweevil, Hypera postica (Gyllenhal) in western Ontario was determinedduring 1973 to 1975. Potasson luna (Girault), a parasitoid of eggs,was found in 13 out of 17 counties surveyed, but parasitism was only0.7-17-0$. Tetrastichus incertus (Ratz.)...

Effect of Maturity on Dry Matter Accumulation and Quality of Forage from Natural Grassland and Three Introduced Grasses in the Accra Plains, Ghana

ABSTRACTEFFECT OF MATURITY ON DRY MATTER ACCUMULATION AND QUALITY OF FORAGE FROM NATURAL GRASSLAND AND THREE INTRODUCED GRASSES IN THE ACCRA PLAINS, GHANA Francis Kwasivie Fianu, Supervisor: University of Guelph, 1977 Dr. J.E. Winch Two studies were conducted in Legon, Ghana, in 1974 and- 1975 to characterize the dry matter accumulation and quality of a natural grassland sward (dominated by Sporobolus and Heteropogon) and of introduced giant star grass (Cynodon plectostachyus (k . Sch...