Institute of Plant Genetic Resources „К. Malkov „- Sadovo, 4122, Sadovo
Резюме
The oat is considered to have a high potential for mitigating saline soil conditions. However, harvest time, soil salt content and varieties can affect the oats capacity to mitigate these stress conditions. The aim of this study was to investigate the influence of different NaCl salt concentrations on germination, early seedling growth and water uptake of oat seeds (Avena sativa L.) The experimental design was two factors factorial (2×5) arranged in a completely randomized design; with two replications. The first factor was seed cultivars (Katan, Kaloyan and Dunav) and the second factor was different concentrations of NaCl (25, 50, 75, 100, 125 and 150 mM). The results showed that the germination percentage, root and shoot length, wet and dry weight of the seedlings and water uptake decreased significantly with increase the salinity levels. Effects of salinity on salt tolerance index of investigated oat cultivars at 150 mM NACl indicated that Katan cultivar is most tolerant at germination stage, while Dunav cultivar at seedling growth stage. PC-analysis grouped analysed cultivars at different salinity stress according to similarity on the basis of investigated germination and seedling characters in two components in the factor plane.
