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dc.contributor.authorRewcastle, Joanneen
dc.date.accessioned2018-01-31T11:35:52Z
dc.date.available2018-01-31T11:35:52Z
dc.date.issued2005en
dc.identifier.urihttp://hdl.handle.net/1842/27261
dc.description.abstracten
dc.description.abstractThe interaction between several species of arbuscular mycorrhizal fungi, micropropagated strawberry plants and Phytophthora fragariae, the pathogen which causes red stele disease of strawberry plants, was investigated. The optimum temperature for germination of zoospore cysts of P. fragariae in vitro was found to be 15°C, and growth of the emerging germ tube was significantly orientated towards the strawberry root tip. Cyst germination was reduced in the presence of a mycorrhizal strawberry root. The method of inoculation of strawberry plants with P. fragariae and assessment of the resulting disease affected the results and the conclusions drawn from the experiments, depending on the virulence of the P. fragariae strain used and the susceptibility of the strawberry cultivar. Elsanta was more susceptible to P. fragariae than the cultivar Rhapsody. A low level o f colonisation of Elsanta with the arbuscular mycorrhizal fungi Glomus mosseae, Glomus intraradices or Glomus fistulosum resulted in a significantly greater amount of total phosphorus in plant shoots compared to non-mycorrhizal plants, although further increases in the percentage of root colonisation by the fungi had no effect on the plants. The presence of these mycorrhizal fungi had no effect on disease due to subsequent inoculation of the plants by P. fragariae. Increasing colonisation of Elsanta by Scutellospora nodosa was correlated with a significant increase in plant size and additional phosphorus uptake. However, these same plants exhibited greater levels o f disease due to the following inoculation with P. fragariae. A low level of root colonisation of Elsanta by Acaulospora scrobiculata caused significant increases in plant size and phosphorus uptake up to a threshold level o f root colonisation beyond which further increases had no affect on the plant. Examination of biochemical markers in the form o f isozyme banding patterns extracted from spores of arbuscular mycorrhizal fungi was explored to assess its potential for use in strain identification, and discussed in relation to other available techniques. The results are discussed in relation to the utilisation of specific strains o f arbuscular mycorrhizal fungi as inoculants of micropropagated strawberry plants of particular cultivars with the potential to increase plant growth and reduce the level of disease due to soil-borne plant pathogens.en
dc.publisherThe University of Edinburghen
dc.relation.isreferencedbyAlready catalogueden
dc.subjectAnnexe Thesis Digitisation Project 2017 Block 16en
dc.titlePlant protection using arbuscular mycorrhizal fungien
dc.typeThesis or Dissertationen
dc.type.qualificationlevelen
dc.type.qualificationnamePhD Doctor of Philosophyen


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