{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/113857"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/113857","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"The application of ecological niche to create multi-strain microbial biocontrols","abstract":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms","abstract_html":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms","abstract_has_math":false,"creators":["Price, Gabriel"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Ecol, Evol, Conservation Biol","degree_department":null,"school":null,"contributors":["Yannarell, Anthony","Mideros, Santiago","Dalling, James","Davis, Adam"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2022,"date_issued":"2022-04-29T21:34:30Z","date_published":"2022-04-29T21:34:30Z","updated_at":"2026-07-22T22:24:53Z","subjects":["Biology"],"languages":["en","eng"],"rights":["Copyright 2021 Gabriel Price-Christenson"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/113857","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Yannarell, Anthony","Mideros, Santiago","Dalling, James","Davis, Adam"]},{"key":"dc:creator","label":"Author","values":["Price, Gabriel"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2022-04-29T21:34:30Z","2021-12","2021-11-29"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Ecol, Evol, Conservation Biol"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Biology"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en","eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2021 Gabriel Price-Christenson"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/113857"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms","The student, Gabriel Price, accepted the attached license on 2021-11-24 at 01:47.","The student, Gabriel Price, submitted this Dissertation for approval on 2021-11-24 at 01:54.","This Dissertation was approved for publication on 2021-11-29 at 10:13.","DSpace SAF Submission Ingestion Package generated from Vireo submission #17258 on 2022-04-06 at 17:09:57","Made available in DSpace on 2022-04-29T21:34:30Z (GMT). No. of bitstreams: 2 PRICE-DISSERTATION-2021.pdf: 5137756 bytes, checksum: 2687a214a98e679809bcdb68ff23bd06 (MD5) LICENSE.txt: 4210 bytes, checksum: 3ad7f2cb3b2e2e2002452cc4b9dd8c61 (MD5) Previous issue date: 2021-11-29","The use of multi-strain microbial biocontrols to limit damage associated with plant pathogens is a promising solution to promote sustainable agricultural practices. However, this type of application has had limited success in field applications and requires the incorporation of ecological theory to develop effective solutions to ensure their efficacy under realistic conditions as well as expedited approaches for selecting isolates for combinations. This work aims to address these problems by first selecting isolates and comparing phylogenetic-based screening methods to validated metabolic approaches (such as colorimetric microarrays) and then testing whether pair-wise combinations between the biocontrol bacteria Enterobacter cloacae and other competitor isolates could influence the suppression of the plant pathogen Pythium ultimum. This work specifically seeks to test whether phylogenetic methods can be used to predict niche overlap between competitor isolates and whether niche preemption can be applied to enhance the suppressive performance of E. cloacae in pair-wise combinations. Further, this work also seeks to determine if there are any undiscovered chemical-based factors that may be influencing the relationship between the biocontrol E. cloacae and the pathogen P. ultimum. The results of this work indicate that as of now, metabolic-based approaches cannot be abandoned when attempting to select isolates based on niche similarity, but that phylogenetic methods may soon be sufficient for predicing niche overlap for some chemical-based relationships. Further, this work also found that niche preemption is not an appropriate ecological mechanism for enhancing the efficacy of E. cloacae, but that another niche-based mechanism such as niche complementarity may be appropriate. Finally, this work also discovered and verified that the chemicals 4-hydroxybenzoic acid and amygdalin can adversely influence the performance of E. cloacae at suppressing P. ultimum. sporangia germination. These results indicate that niche-based ecology can be effective at enhancing the performance of multi-strain biocontrols, but that care needs to be taken to determine which ecological mechanisms are appropriate for each pathogen-biocontrol system being addressed."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["The application of ecological niche to create multi-strain microbial biocontrols"]}]}],"canonical_facts":{"dc:contributor":["Yannarell, Anthony","Mideros, Santiago","Dalling, James","Davis, Adam"],"dc:creator":["Price, Gabriel"],"dc:date":["2022-04-29T21:34:30Z","2021-12","2021-11-29"],"dc:description":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms","The student, Gabriel Price, accepted the attached license on 2021-11-24 at 01:47.","The student, Gabriel Price, submitted this Dissertation for approval on 2021-11-24 at 01:54.","This Dissertation was approved for publication on 2021-11-29 at 10:13.","DSpace SAF Submission Ingestion Package generated from Vireo submission #17258 on 2022-04-06 at 17:09:57","Made available in DSpace on 2022-04-29T21:34:30Z (GMT). No. of bitstreams: 2 PRICE-DISSERTATION-2021.pdf: 5137756 bytes, checksum: 2687a214a98e679809bcdb68ff23bd06 (MD5) LICENSE.txt: 4210 bytes, checksum: 3ad7f2cb3b2e2e2002452cc4b9dd8c61 (MD5) Previous issue date: 2021-11-29","The use of multi-strain microbial biocontrols to limit damage associated with plant pathogens is a promising solution to promote sustainable agricultural practices. However, this type of application has had limited success in field applications and requires the incorporation of ecological theory to develop effective solutions to ensure their efficacy under realistic conditions as well as expedited approaches for selecting isolates for combinations. This work aims to address these problems by first selecting isolates and comparing phylogenetic-based screening methods to validated metabolic approaches (such as colorimetric microarrays) and then testing whether pair-wise combinations between the biocontrol bacteria Enterobacter cloacae and other competitor isolates could influence the suppression of the plant pathogen Pythium ultimum. This work specifically seeks to test whether phylogenetic methods can be used to predict niche overlap between competitor isolates and whether niche preemption can be applied to enhance the suppressive performance of E. cloacae in pair-wise combinations. Further, this work also seeks to determine if there are any undiscovered chemical-based factors that may be influencing the relationship between the biocontrol E. cloacae and the pathogen P. ultimum. The results of this work indicate that as of now, metabolic-based approaches cannot be abandoned when attempting to select isolates based on niche similarity, but that phylogenetic methods may soon be sufficient for predicing niche overlap for some chemical-based relationships. Further, this work also found that niche preemption is not an appropriate ecological mechanism for enhancing the efficacy of E. cloacae, but that another niche-based mechanism such as niche complementarity may be appropriate. Finally, this work also discovered and verified that the chemicals 4-hydroxybenzoic acid and amygdalin can adversely influence the performance of E. cloacae at suppressing P. ultimum. sporangia germination. These results indicate that niche-based ecology can be effective at enhancing the performance of multi-strain biocontrols, but that care needs to be taken to determine which ecological mechanisms are appropriate for each pathogen-biocontrol system being addressed."],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/113857"],"dc:language":["en","eng"],"dc:rights":["Copyright 2021 Gabriel Price-Christenson"],"dc:subject":["Biology"],"dc:title":["The application of ecological niche to create multi-strain microbial biocontrols"],"dc:type":["text","Thesis"],"thesis:degree_discipline":["Ecol, Evol, Conservation Biol"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:53Z"}