Yahya, Asha
- Department of Crop Production Ecology, Swedish University of Agricultural Sciences
Research article2010Peer reviewed
SELECTIVITY AND PARTITIONING OF POTASSIUM AND SODIUM IN SESAME
Yahya, Asha
Abstract
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 L
Published in
Journal of Plant Nutrition
2010, volume: 33, number: 5, pages: 670-683
Publisher: TAYLOR & FRANCIS INC
SLU Authors
UKÄ Subject classification
Agricultural Science
Publication identifier
- DOI: https://doi.org/10.1080/01904160903575907
Permanent link to this page (URI)
https://res.slu.se/id/publ/48453