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Factors contributing to herbicide response in CoAXium wheat

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dc.contributor.authorPelon, Amber L., author
dc.contributor.authorDayan, Franck, advisor
dc.contributor.authorGaines, Todd, committee member
dc.contributor.authorSchipanski, Meagan, committee member
dc.date.accessioned2024-05-27T10:32:01Z
dc.date.available2024-05-27T10:32:01Z
dc.date.issued2024
dc.description.abstractCompared to other pests, weed competition has the most significant negative impact on wheat grain yield. Understanding the contribution of metabolism in overall tolerance to herbicides can lead to new methods for controlling weeds in wheat. Glutathione S-transferase's (GSTs) role in the detoxification of herbicides has been studied since 1970. Previous literature reported increased resistance to herbicides with higher GST activity in black grass (Alopecurus myosuroides) and Asia minor bluegrass (Polypogon fugax). Resistance could be reversed by inhibiting GST activity. This research assesses the role of Phase 2 plant cell metabolism by testing (GST) inhibition to see if it influences the metabolism of quizalofop P-ethyl (QPE) in winter wheat (Triticum aestivum). We hypothesized that the addition of a safener would make the wheat more tolerant to the herbicide while the addition of a GST inhibitor would make the wheat more sensitive to QPE. Experiments were conducted analyzing the QPE effect on whole-plant biomass and an LC-MS/MS analysis of the amount of quizalofop acid (QZA) found in plant extracts. Safeners enhanced herbicide metabolism which increased CoAXium wheat tolerance to QPE. GST inhibitors, conversely, decreased herbicide metabolism causing CoAXium wheat to be more sensitive to QPE. Understanding the contribution of metabolism in overall resistance to herbicides can lead to breeding improvements for more herbicide-tolerant wheat varieties and new methods for controlling weeds in wheat.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.identifierPelon_colostate_0053N_18292.pdf
dc.identifier.urihttps://hdl.handle.net/10217/238413
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartof2020-
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subjectglutathione S-transferase
dc.subjectnontarget-site resistance
dc.subjectwheat
dc.subjectherbicide metabolism
dc.subjectdetoxification
dc.subjectquizalofop
dc.titleFactors contributing to herbicide response in CoAXium wheat
dc.typeText
dcterms.rights.dplaThis Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
thesis.degree.disciplineAgricultural Biology
thesis.degree.grantorColorado State University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science (M.S.)

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