1. Internatioanal congres on medicinal and aromatic plants, 9 - 12 May 2017, no.1
The study was conducted in order to determine some agronomical, physiological and root morphological tolerance characteristics of two different salvia species under different salinity levels. The experiment was carried by using hydroponic system in fully automated climate chambers. Two different salvia species (Salvia tomentosaMill. and Salvia officinalis L.) were grown in 8 L pots filled continuously aerated nutrient solution under different EC levels (1, 2, 3, 4 and 5 dS m-1). EC levels were arranged by adding NaCl into nutrient solution. The experiment was designed in completely randomized block design with three replications. To determine the plant growth, physiological and root morphological response of salvia speciesshoot and root fresh and dry weight (g/plant), stem length (cm/plant), leaf area (cm²/ plant), leaf chlorophyll content (SPAD), photosynthesis, root length (m/plant), root diameter (mm), and volume (cm3/plant) was investigated under five salinity levels. The results indicated that shoot (stem and leaf fresh and dry matter, leaf area, stem length) and root (root fresh and dry matter, root length, root volume) growth significantly (P<0.001) affected by different levels of EC and salvia species. Increasing EC level decreased the shoot and root parameters of both salvia species. However, in terms of most measured shoot and root parameters highly significant differences (P<0.001) were found between two salvia species. The interactions between species and EC were also significant in most measured parameters. Generally, Salvia tomentosaMill. showed a better performance in plant growth and salt tolerance compared to Salvia officinalis L. This could be the results of leaf physiological (higher leaf area) and root morphological (higher root length and volume) contributory traits which might be play an important role in salt tolerance of Salvia tomentosaMill.