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    Salinity induced differences in growth, ion distribution and partitioning in barley between the cultivar Maythorpe and its derived mutant Golden Promise

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    Authors
    Wei, Wenxue
    Bilsborrow, Paul E.
    Hooley, Paul
    Fincham, Daron A.
    Lombi, Enzo
    Forster, Brian P.
    Issue Date
    2003
    
    Metadata
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    Abstract
    Dry matter changes and ion partitioning in two near isogenic barley cultivars Maythorpe (relatively salt sensitive) and Golden Promise (relatively salt tolerant) were studied in response to increasing salinity. Although the growth of both cultivars was significantly reduced by exposure to NaCl, the effect was greater in Maythorpe, whilst Golden Promise maintained an increased ratio of young to old leaf blade. Golden Promise maintained significantly lower Na+ concentrations in young expanding tissues compared with Maythorpe. Partitioning of Cl– was evident in that both varieties maintained lower Cl– concentrations in mesophyll than in epidermal cells. Golden Promise maintained higher K+/Na+ and Ca2+/Na+ ratios in young leaf blade and young sheath tissues than Maythorpe when exposed to salt. Differences in ion partitioning and the maintenance of higher K+ and Ca2+ to Na+ ratios, especially in young growing and recently expanded tissues, would appear to be important mechanisms contributing to the improved salt tolerance of Golden Promise.
    Citation
    Plant and Soil, 250(2): 183–191.
    Publisher
    Springer Verlag
    Journal
    Plant and Soil
    URI
    http://hdl.handle.net/2436/22172
    DOI
    10.1023/A:1022832107999
    Additional Links
    http://www.springerlink.com/content/t5u877px92127227/
    Type
    Journal article
    Language
    en
    ISSN
    0032079X
    15735036
    ae974a485f413a2113503eed53cd6c53
    10.1023/A:1022832107999
    Scopus Count
    Collections
    Research Institute in Healthcare Science

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