Effect of salinity stress on 7 species of range plants in germination stage

Salinity is one of the increasing problems in the world which include the wide area of our country. Regardness to increment in salinity lands and shortage in desirable soils for cultivation, recognition of range plants that are salt tolerance is very important. In order to study the effect of different salinity levels on germination of Haloxylon phyllum, Seidlitzia rosmarinus, Haloxylon persicum, Pteropyrom aucheri, Zygophllum euryypterm, Sueda fruticosa, and Atriplex lentiformis species, the experiment was conducted in germination stage as a factorial experimental based on CRD with three replications. Salinity levels applied were zero (control), 100, 200, 300, 400 and 500 mM NaCl. The results showed that with increasing salinity level, germination rate and percentage of germination were decreased. This decrease was different among the studied species. There was very significant difference between levels of salinity. Among the studied species, Haloxylon aphyllum and Sueda fruticosa had the maximum and minimum percentage of germination respectively. Seidlitzia rosmarinus and Pterophyrum aucheri had the maximum and minimum of germination rate respectively. Ability of germination in different concentrations of salinity describes rate of seeds resistance. There was very diversity for germination responses of the studied species.