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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

Lookup NU author(s): Dr Paul BilsborrowORCiD

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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.

Publication metadata

Author(s): Wei W, Bilsborrow PE, Hooley P, Fincham DA, Lombi E, Forster BP

Publication type: Article

Publication status: Published

Journal: Plant and Soil

Year: 2003

Volume: 250

Issue: 2

Pages: 183-191

Print publication date: 01/03/2003

ISSN (print): 0032-079X

ISSN (electronic): 1573-5036

Publisher: Springer

URL: http://dx.doi.org/10.1023/A:1022832107999

DOI: 10.1023/A:1022832107999

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