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    Variation in shoot tolerance mechanisms not related to ion toxicity in barley

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    Name:
    Tilbrook et al - Revised ManuscriptRS24072017.pdf
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    1.660Mb
    Format:
    PDF
    Description:
    Accepted Manuscript
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    Type
    Article
    Authors
    Tilbrook, Joanne
    Schilling, Rhiannon K.
    Berger, Bettina
    Garcia, Alexandre F.
    Trittermann, Christine
    Coventry, Stewart
    Rabie, Huwaida
    Brien, Chris cc
    Nguyen, Martin
    Tester, Mark A. cc
    Roy, Stuart J.
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Desert Agriculture Initiative
    Plant Science
    Date
    2017-09-27
    Online Publication Date
    2017-09-27
    Print Publication Date
    2017
    Permanent link to this record
    http://hdl.handle.net/10754/626216
    
    Metadata
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    Abstract
    Soil salinity can severely reduce crop growth and yield. Many studies have investigated salinity tolerance mechanisms in cereals using phenotypes that are relatively easy to measure. The majority of these studies measured the accumulation of shoot Na+ and the effect this has on plant growth. However, plant growth is reduced immediately after exposure to NaCl before Na+ accumulates to toxic concentrations in the shoot. In this study, nondestructive and destructive measurements are used to evaluate the responses of 24 predominately Australian barley (Hordeum vulgare L.) lines at 0, 150 and 250mMNaCl. Considerable variation for shoot tolerance mechanisms not related to ion toxicity (shoot ion-independent tolerance) was found, withsome lines being able to maintain substantial growth rates under salt stress, whereas others stopped growing. Hordeum vulgare spp. spontaneum accessions and barley landraces predominantly had the best shoot ion independent tolerance, although two commercial cultivars, Fathom and Skiff, also had high tolerance. The tolerance of cv. Fathom may be caused by a recent introgression from H. vulgare L. spp. spontaneum. This study shows that the most salt-tolerant barley lines are those that contain both shoot ion-independent tolerance and the ability to exclude Na+ from the shoot (and thus maintain high K+: Na+ ratios).
    Citation
    Tilbrook J, Schilling RK, Berger B, Garcia AF, Trittermann C, et al. (2017) Variation in shoot tolerance mechanisms not related to ion toxicity in barley. Functional Plant Biology 44: 1194. Available: http://dx.doi.org/10.1071/FP17049.
    Sponsors
    The authors acknowledge funding from the Grains Research and Development Corporation, Australia (UA00118 and UA00145) and the Adelaide Barley Breeders (University of Adelaide) for advice and plant material. The Plant Accelerator, Australian Plant Phenomics Facility, is funded by the National Collaborative Research Infrastructure Strategy of the Commonwealth of Australia. Accession YU6472 was supplied through a China Tasmanian Institute of Agriculture and Grains Research and Development Corporation collaboration and Parent 19 was sourced from the International Center for Agricultural Research in the Dry Areas, Lebanon.
    Publisher
    CSIRO Publishing
    Journal
    Functional Plant Biology
    DOI
    10.1071/FP17049
    Additional Links
    http://www.publish.csiro.au/fp/FP17049
    ae974a485f413a2113503eed53cd6c53
    10.1071/FP17049
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Desert Agriculture Initiative

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