Effect of osmotic stress on compatible solutes content, membrane stability and water relations in two maize cultivars
2006
Valentovic, P.(Slovenska Akademia Vied, Bratislava (Slovak Republic). Botanicky Ustav) E-mail:[email protected] | Luxova, M.(Slovenska Akademia Vied, Bratislava (Slovak Republic). Botanicky Ustav) | Kolarovic, L.(Slovenska Akademia Vied, Bratislava (Slovak Republic). Botanicky Ustav) | Gasparikova, O.(Slovenska Akademia Vied, Bratislava (Slovak Republic). Botanicky Ustav)
The effect of osmotic stress on oxidative injury, compatible solutes content and water relations was investigated in two maize cultivars: drought-sensitive Ankora and drought-tolerant Nova. Relative water content in leaves of both cultivars decreased after drought treatment, the leaf water loss was higher in Ankora than in Nova. The 24 h water stress induced by 0.3M sorbitol (-1.4 MPa) resulted in a damage of cell membranes. Lipid peroxidation rose in all studied organs of Ankora and electrolyte leakage in roots was much higher in Ankora than in Nova. Concentrations of soluble sugars increased in all studied organs of both cultivars, whereas proline conc. increased significantly only in Ankora. Osmotic stress had deep influence predominantly on the roots as the elecrolyte leakage was the highest in the roots of both cultivars. Stress impact on the drought-sensitive cv. Ankora was deeper than on the drought-tolerant cv. Nova.
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