Global ETD Search

181	Intra specific variation and inheritance of tolerance to alkaline induced iron chlorosis in white lupin (Lupinus albus L.) Rogers, Tom January 2002 (has links) No description available. 583 Tolerant and intolerant genotypes
182	An analysis of Antirrhinum majus cyclin A20 and cyclin D1 function in Arabidopsis thaliana Parinyapong, Piyarat January 2002 (has links) No description available. 583 Cell cycle regulation
183	Using a transgenic approach to study source sink interactions within the potato (Solanum tuberosum L.) plant Howard, Thomas Paul January 2002 (has links) No description available. 583 Carbohydrate flux
184	Characterisation of RPP28 a gene in Arabidopsis thaliana conferring isolate specific resistance to Peronospora parasitica Sepahvand, Niaz Ali January 2002 (has links) No description available. 583 Downey mildew
185	Nitrogen uptake and fixation in autumn sown white lupin (Lupinus albus) and its influence on senescence, seed yield and seed nitrogen content Newton, David George January 2002 (has links) No description available. 583 Nitrogenous fertilisers
186	Heavy metal tolerance and mycorrhizal colonisation in Thymus polytrichus A. Kerner ex BorbaÌs ssp. britannicus (Ronn.) Kerguelen (Lamiaceae) Whitfield, Lynn January 2002 (has links) No description available. 583 Soil contamination
187	The phytoremediation potential of Salix : studies of the interaction of heavy metals and willows Watson, Conor January 2002 (has links) No description available. 583 QD Chemistry
188	Acclimation of cotton (gossypium) to abiotic stress Armeanu, Katrin January 2003 (has links) No description available. 583 Stress resistance
189	The use of substitution lines to dissect genetically complex traits in Arabidopsis thaliana Townson, Paul Donald January 2002 (has links) No description available. 583 Quantitative traits
190	Studies of components for a potential integrated control system for Plasmodiophora brassicae Page, Lisa Victoria January 2001 (has links) The soil inhabiting organism Plasmodiophora brassicae infects brassica crops causing millions of pounds of damage each year. The result of infection is extensive galling of the root system and eventually plant death. Current control measures are limited and the variability of the pathogen and its lifecycle makes finding new controls difficult. It was therefore considered that if several measures could be identified which reduced P. brassicae infection then they could be used in combination, reducing the possibility that the pathogen could evolve to overcome the controls. This research therefore aimed to find a set of control measures, and where possible a mode of action, which could be used in combination or alone to reduce P. brassicae infections. Calcium nitrate was identified as an effective control measure which affected several stages of P. brassicaes lifecycle (Fig :1) as well as the predominant pathogen race. The type of growth medium used was also found to affect the extent of infection and to influence the pathogen population. Soils from two areas were identified as suppressive to P. brassicae and the nature of their suppression was determined to be due to both biotic and abiotic factors. The identification of these suppressive soils may lead to the development of a bio-control or it may be possible to encourage these soils to develop in other areas. Some more "holistic" control measures were also investigated. Applications of calcified seaweed were found to be at least as effective in decreasing clubbing as calcium carbonate. Applications of chitin and seaweed extract however were found to have no effect on P. brassicae infection in this instance. The research within this thesis has identified several control measures and answered some questions about P. brassicae. It has however, also raised more questions and identified areas which require more research. 583 Brassica crops

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