Salinity induced differences in growth, ion distribution and partitioning in barley between the cultivar Maythorpe and its derived mutant Golden Promise
Wei, Wenxue Bilsborrow, Paul E. Hooley, Paul Fincham, Daron A. Lombi, Enzo Forster, Brian P.
Wei, Wenxue
Bilsborrow, Paul E.
Hooley, Paul
Fincham, Daron A.
Lombi, Enzo
Forster, Brian P.
Editors
Other contributors
Affiliation
Epub Date
Issue Date
2003
Submitted date
Subjects
Alternative
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
Journal
Research Unit
PubMed ID
PubMed Central ID
Embedded videos
Additional Links
Type
Journal article
Language
en
Description
Series/Report no.
ISSN
0032079X
15735036
15735036