Interactions between nematodes, potato and soil-borne micro-organisms and their effect on the management of potato cyst nematodes

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dc.check.date10000-01-01
dc.check.embargoformatBoth hard copy thesis and e-thesisen
dc.check.entireThesisEntire Thesis Restricted
dc.check.infoIndefiniteen
dc.check.opt-outNot applicableen
dc.check.reasonThis thesis is due for publication or the author is actively seeking to publish this materialen
dc.contributor.advisorJones, Peter W.en
dc.contributor.authorLettice, Eoin P.
dc.contributor.funderIrish Research Councilen
dc.date.accessioned2016-02-17T09:21:57Z
dc.date.issued2014
dc.date.submitted2014
dc.description.abstractPotato cyst nematodes (PCN) cause significant damage to the potato crop worldwide and growers experience economic losses related to yield loss and the cost of control measures. Experiments were set up to further elucidate the complex tritrophic PCNpotato-soil bacteria relationship. Bacterial strains isolated from the sugar beet rhizosphere were shown to be hatch active towards Globodera pallida and to be capable of successfully colonising the sugar beet rhizosphere when applied exogenously. A trap-crop system, based on these isolates, was proposed. Ridge and bulk soil taken from a commercial potato field were incubated with sterile potato root leachate (sPRL) and subsequent in vitro hatching assays showed that PCN hatch was influenced by microorganisms present in the ridge, but not in the bulk soil. Community level physiological profiling (CLPP) of ridge and bulk soil, using BIOLOG EcoplatesTM, demonstrated differences in bacterial functional diversity between the two soil types. An investigation of the inter-species competition between G. pallida and G. rostochiensis showed that G. pallida performed significantly better, in terms of multiplication rate, in competition with G. rostochiensis compared to its multiplication rate in single-species populations. Effectively removing the early hatch of G. rostochiensis in pot trials led to the removal of this competitive advantage of G. pallida suggesting that this advantage was due, at least in part, to morphological changes to the root caused by the early hatching of G. rostochiensis.en
dc.description.sponsorshipIrish Research Council (EMBARK Initiative)en
dc.description.statusNot peer revieweden
dc.description.versionAccepted Version
dc.format.mimetypeapplication/pdfen
dc.identifier.citationLettice, E.P. 2014. TInteractions between nematodes, potato and soil-borne micro-organisms and their effect on the management of potato cyst nematodes. PhD Thesis, University College Cork.en
dc.identifier.urihttps://hdl.handle.net/10468/2295
dc.language.isoenen
dc.publisherUniversity College Corken
dc.rights© 2014, Eoin P. Lettice.en
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/en
dc.subjectNematodesen
dc.subjectPlant scienceen
dc.subjectPotatoen
dc.subjectBiological controlen
dc.thesis.opt-outfalse
dc.titleInteractions between nematodes, potato and soil-borne micro-organisms and their effect on the management of potato cyst nematodesen
dc.typeDoctoral thesisen
dc.type.qualificationlevelDoctoralen
dc.type.qualificationnamePhD (Science)en
ucc.workflow.supervisorp.jones@ucc.ie
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