Research article - Peer-reviewed, 2010
SELECTIVITY AND PARTITIONING OF POTASSIUM AND SODIUM IN SESAME
Yahya, AshaAbstract
Net uptake and partitioning of sodium (Na+) and potassium (K+) in plants of two sesame cultivars (Sesamum indicum cv. 'PB-1' and cv. 'UCR') exposed to 20 mM sodium chloride (NaCl) were studied over a period of 28 days. Both cultivars showed a marked discrimination between K+ and Na+ during uptake. The reduction of K+ in the plants caused by the NaCl treatment was of similar magnitude in the two cvs. The cv. 'UCR' showed lower Na+ concentrations in the shoot tissues than 'PB-1' and K+/Na+ selectivity ratios were higher in cv. 'UCR' than in cv. 'PB-1'. At the last sampling on day 28 there was a marked decrease of shoot growth in cv. 'PB-1' in comparison to the cv. 'UCR'. Leaves of cv. 'PB-1' showed clear toxic symptoms, while those of cv. 'UCR' did not. It is concluded that Na+ exclusion from the shoot contributes to salt tolerance of sesame, cv. 'UCR'.Keywords
ion toxicity; K; Na plus -selectivity; Na plus -exclusion; nutrient partitioning; salinity; Sesamum indicum LPublished in
Journal of Plant Nutrition2010, volume: 33, number: 5, pages: 670-683
Publisher: TAYLOR & FRANCIS INC
Authors' information
Yahya, Asha
Swedish University of Agricultural Sciences, Department of Crop Production Ecology
UKÄ Subject classification
Agricultural Science
Publication Identifiers
DOI: https://doi.org/10.1080/01904160903575907
URI (permanent link to this page)
https://res.slu.se/id/publ/48453