Shared more. Cited more. Safe forever.
    • advanced search
    • submit works
    • about
    • help
    • contact us
    • login
    View Item 
    •   MOspace Home
    • University of Missouri System
    • Missouri Summits
    • Missouri Energy Summit 2009
    • Posters (Missouri Energy Summit 2009)
    • View Item
    •   MOspace Home
    • University of Missouri System
    • Missouri Summits
    • Missouri Energy Summit 2009
    • Posters (Missouri Energy Summit 2009)
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.
    advanced searchsubmit worksabouthelpcontact us

    Browse

    All of MOspaceCommunities & CollectionsDate IssuedAuthor/ContributorTitleIdentifierThesis DepartmentThesis AdvisorThesis SemesterThis CollectionDate IssuedAuthor/ContributorTitleIdentifierThesis DepartmentThesis AdvisorThesis Semester

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular AuthorsStatistics by Referrer

    Root Growth under Drought --- Role of Cell Wall Localized Reactive Oxygen Species [abstract]

    Voothuluru, Priyamvada
    Yamaguchi, Mineo
    Zhu, Jinming
    Cho, In-jeong, 1970-
    LeNoble, Mary E.
    Oliver, Melvin J.
    Simmonds, John
    Sharp, Bob (Robert E.)
    View/Open
    [PDF] Root Growth under Drought [abstract].pdf (17.40Kb)
    Date
    2009
    Contributor
    University of Missouri (System)
    Format
    Abstract
    Metadata
    [+] Show full item record
    Abstract
    Drought is the most important cause of crop failure in Missouri and limits crop production in large parts of the US and the world. The root system is critical to plant adaption and crop productivity in drought-prone environments. Some types of roots have the ability to maintain elongation under severe water deficit levels which completely inhibit shoot growth. Previous work on maize primary root growth under water deficit conditions showed that cell elongation is maintained in the apical region of the growth zone but progressively inhibited further from the apex. In association with these growth responses, cell wall extensibility is enhanced in the apical region but decreased in the basal region of the root growth zone. Cell wall proteomic analyses were conducted to identify proteins important for wall extensibility and elongation (Zhu et al. 2007, Plant Physiol. 145: 1533-48). The results revealed predominantly region-specific changes in protein profiles between well-watered and water-stressed roots. Several cell wall proteins related to reactive oxygen species (ROS) generation showed an increased abundance in the apical region of water-stressed roots, prominent among them being putative oxalate oxidases, which result in hydrogen peroxide generation. An increase in cell wall localized ROS in the apical region of water-stressed roots was confirmed by in-situ imaging. ROS could have cell wall loosening or tightening effects and these effects could be region specific. To understand the role of oxalate oxidase/cell wall localized ROS in root elongation, we are studying a transgenic maize line constitutively expressing a wheat oxalate oxidase gene (Ramputh et al. 2002, Plant Sci. 162: 431-440). The results show differential effects on growth and growth-related processes in well-watered and water-stressed roots. Experiments to determine the mechanisms of root growth regulation by oxalate oxidase/cell wall-localized ROS are in progress. This information could be used to develop plants that produce appropriate amounts of ROS to enhance root growth under water deficit conditions. The results may also be applicable to understanding and manipulating plant growth responses to other environmental challenges.
    URI
    http://hdl.handle.net/10355/1142
    Collections
    • Plant Sciences presentations (MU)
    • Posters (Missouri Energy Summit 2009)
    • Abstracts (Missouri Energy Summit 2009)

    Send Feedback
    hosted by University of Missouri Library Systems
     

     


    Send Feedback
    hosted by University of Missouri Library Systems