• Login
    View Item 
    •   Home
    • UA Graduate and Undergraduate Research
    • UA Theses and Dissertations
    • Honors Theses
    • View Item
    •   Home
    • UA Graduate and Undergraduate Research
    • UA Theses and Dissertations
    • Honors Theses
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Detection and Attempted Quantification of Allelopathic Chemicals in Buffelgrass (Pennisetum ciliare) Root Leachates Using Reverse Phase-HPLC

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    azu_etd_mr_2013_0239_sip1_m.pdf
    Size:
    1.294Mb
    Format:
    PDF
    Download
    Author
    Vo, Duyen Thuy
    Issue Date
    2013
    Advisor
    Dlugosch, Katrina
    
    Metadata
    Show full item record
    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.
    Abstract
    Pennisetum ciliare, commonly known as buffelgrass, is an invasive grass that has led to noticeable declines in perennial diversity and abundance. Allelopathy, which describes the exudation of secondary metabolites that result in detrimental effects upon neighboring species, has been implicated as a possible mechanism for buffelgrass' success due to observations that its root leachates inhibit the growth of native plants. Since past researchers have only revealed the identity of the acids present within the leachates (Table 1), I have proposed methods in which to extract and quantify these chemicals by employing reverse phase-HPLC. By comparing retention times with that of standards for the identified allelochemicals, p-hydroxybenzoic, vanillic, syringic, and p-coumaric acid were confirmed in buffelgrass root leachates by HPLC. Using calibration curves, buffelgrass roots were found to consist of 5.801x10⁻³±5x10⁻⁶% p-hydroxybenzoic acid, 3.259x10⁻³±8x10⁻⁶% vanillic acid, 4.940x10⁻³±5x10⁻⁶% syringic acid, and 4.369x10⁻³±5x10⁻⁶% p-coumaric acid, by weight. The detection of the acids demonstrated that these compounds were at a significant enough concentration to be detected, thereby suggesting that they may play a major role in plant interference. By detecting and quantifying phytotoxins in native and invasive plants, the chemicals responsible for inhibiting plant growth could be elucidated, establishing a quantifiable criterion of allelopathy.
    Type
    text
    Electronic Thesis
    Degree Name
    B.S.
    Degree Level
    bachelors
    Degree Program
    Honors College
    Biochemistry
    Degree Grantor
    University of Arizona
    Collections
    Honors Theses

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.