Sammanfattning

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'.

Nyckelord

ion toxicity; K; Na plus -selectivity; Na plus -exclusion; nutrient partitioning; salinity; Sesamum indicum L

Publicerad i

Journal of Plant Nutrition
2010, Volym: 33, nummer: 5, sidor: 670-683
Utgivare: TAYLOR & FRANCIS INC

SLU författare

• Yahya, Asha

  • Institutionen för växtproduktionsekologi, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Jordbruksvetenskap


Publikationens identifierare

DOI: https://doi.org/10.1080/01904160903575907

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/48453