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    Identification of Proteins Involved in Salinity Tolerance in Salicornia bigelovii

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    Name:
    Octavio Salazar Dissertation.pdf
    Size:
    10.81Mb
    Format:
    PDF
    Description:
    Octavio Salazar Moya Dissertation
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    Type
    Dissertation
    Authors
    Salazar Moya, Octavio Ruben cc
    Advisors
    Tester, Mark A. cc
    Committee members
    Ravasi, Timothy cc
    Hirt, Heribert cc
    Martinoia, Enrico
    Program
    Plant Science
    KAUST Department
    Biological and Environmental Science and Engineering (BESE) Division
    Date
    2017-11
    Embargo End Date
    2018-11-27
    Permanent link to this record
    http://hdl.handle.net/10754/626217
    
    Metadata
    Show full item record
    Access Restrictions
    At the time of archiving, the student author of this dissertation opted to temporarily restrict access to it. The full text of this dissertation became available to the public after the expiration of the embargo on 2018-11-27.
    Abstract
    With a global growing demand in food production, agricultural output must increase accordingly. An increased use of saline soils and brackish water would contribute to the required increase in world food production. Abiotic stresses, such as salinity and drought, are also major limiters of crop growth globally - most crops are relatively salt sensitive and are significantly affected when exposed to salt in the range of 50 to 200 mM NaCl. Genomic resources from plants that naturally thrive in highly saline environments have the potential to be valuable in the generation of salt tolerant crops; however, these resources have been largely unexplored. Salicornia bigelovii is a plant native to Mexico and the United States that grows in salt marshes and coastal regions. It can thrive in environments with salt concentrations higher than seawater. In contrast to most crops, S. bigelovii is able to accumulate very high concentrations (in the order of 1.5 M) of Na+ and Cl- in its photosynthetically active succulent shoots. Part of this tolerance is likely to include the storage of Na+ in the vacuoles of the shoots, making S. bigelovii a good model for understanding mechanisms of Na+ compartmentalization in the vacuoles and a good resource for gene discovery. In this research project, phenotypic, genomic, transcriptomic, and proteomic approaches have been used for the identification of candidate genes involved in salinity tolerance in S. bigelovii. The genomes and transcriptomes of three Salicornia species have been sequenced. This information has been used to support the characterization of the salt-induced transcriptome of S. bigelovii shoots and the salt-induced proteome of various organellar membrane enriched fractions from S. bigelovii shoots, which led to the creation of organellar membrane proteomes. Yeast spot assays at different salt concentrations revealed several proteins increasing or decreasing yeast salt tolerance. This work aims to create the basis for Salicornia research by providing a genome, transcriptomes, and organellar proteomes, contributing to salinity tolerance research overall. We identified a set of candidate genes for salinity tolerance with the aim of shedding some light on the mechanisms by which this plant thrives in highly saline environments.
    Citation
    Salazar Moya, O. R. (2017). Identification of Proteins Involved in Salinity Tolerance in Salicornia bigelovii. KAUST Research Repository. https://doi.org/10.25781/KAUST-N87W3
    DOI
    10.25781/KAUST-N87W3
    ae974a485f413a2113503eed53cd6c53
    10.25781/KAUST-N87W3
    Scopus Count
    Collections
    Biological and Environmental Science and Engineering (BESE) Division; PhD Dissertations; Plant Science Program

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