An Assessment of the Effects of Insect Host Condition on Entomopathogenic Nematodes and Their Symbiotic Bacteria

Persistent Link:
http://hdl.handle.net/10150/146124
Title:
An Assessment of the Effects of Insect Host Condition on Entomopathogenic Nematodes and Their Symbiotic Bacteria
Author:
Miranda, Victoria Alicia
Issue Date:
2010
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Embargo:
Release after 16-Dec-2011
Abstract:
This study investigated a system comprised of entomopathogenic nematodes (EPN) (Steinernematidae and Heterorhabditidae), their symbiotic bacteria (Xenorhabdus, Photorhabdus) and an insect host, M. sexta. The focus of this investigation was to examine the effects insect host condition on the nematode-bacterium mutualistic partnership as a whole. The EPN used in the study had varying host-searching strategies: an ambusher, Steinernema carpocapsae, and a cruiser, Heterorhabditis sonorensis. Insect host age and diet were evaluated as factors that affect insect host condition. Wandering 5th instar M. sexta were much less susceptible to EPN infection compared to non-wandering 5th instar larvae, regardless of EPN species. Insect host diet had a significant impact on H. sonorensis susceptibility to EPN infection, and a non-significant trend was observed for S. carpocapsae. EPN and bacterial symbiont fitness were unaffected by insect host condition. This is the first record of the effect of insect host condition on both EPN and their symbiotic bacteria.
Type:
text; Electronic Thesis
Keywords:
Entomopathogenic nematodes; Heterorhabditis sonorensis; insect host condition; insect host diet; Manduca sexta; Steinernema carpocapsae
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Entomology
Degree Grantor:
University of Arizona
Advisor:
Stock, S. Patricia

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleAn Assessment of the Effects of Insect Host Condition on Entomopathogenic Nematodes and Their Symbiotic Bacteriaen_US
dc.creatorMiranda, Victoria Aliciaen_US
dc.contributor.authorMiranda, Victoria Aliciaen_US
dc.date.issued2010-
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.releaseRelease after 16-Dec-2011en_US
dc.description.abstractThis study investigated a system comprised of entomopathogenic nematodes (EPN) (Steinernematidae and Heterorhabditidae), their symbiotic bacteria (Xenorhabdus, Photorhabdus) and an insect host, M. sexta. The focus of this investigation was to examine the effects insect host condition on the nematode-bacterium mutualistic partnership as a whole. The EPN used in the study had varying host-searching strategies: an ambusher, Steinernema carpocapsae, and a cruiser, Heterorhabditis sonorensis. Insect host age and diet were evaluated as factors that affect insect host condition. Wandering 5th instar M. sexta were much less susceptible to EPN infection compared to non-wandering 5th instar larvae, regardless of EPN species. Insect host diet had a significant impact on H. sonorensis susceptibility to EPN infection, and a non-significant trend was observed for S. carpocapsae. EPN and bacterial symbiont fitness were unaffected by insect host condition. This is the first record of the effect of insect host condition on both EPN and their symbiotic bacteria.en_US
dc.typetexten_US
dc.typeElectronic Thesisen_US
dc.subjectEntomopathogenic nematodesen_US
dc.subjectHeterorhabditis sonorensisen_US
dc.subjectinsect host conditionen_US
dc.subjectinsect host dieten_US
dc.subjectManduca sextaen_US
dc.subjectSteinernema carpocapsaeen_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineEntomologyen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorStock, S. Patriciaen_US
dc.contributor.committeememberBronstein, Judith L.en_US
dc.contributor.committeememberDavidowitz, Goggyen_US
dc.identifier.proquest11399-
dc.identifier.oclc752261266-
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