The Effects of Salinity Stress on Related germination traits of wheat genotypes

Salinity stress is the most important osmotic stress that limits growth and production of crop via changing ion and osmotic balance. In order to investigation of salinity stress effects on germination، vegetative and some germination indices an experiment conducted by factorial based on randomized completely block designs with 4 replications in 2010 in department of agriculture of Urmia Payame Nor. The factors were 8 genotypes (Shahriar، Sardari، Sardari 39، Sardari 101، Zarin، Arvand، fgs and Azar 2 and 6 level of salinity (0 -2-4-8-12-16) ds/m from Nacl. The results showed that different levels of salinity had significantly effects on germination percent، root dry weight، seedling dry weight، plantlet dry weight، germination rate، germination uniformity، stem length، stress tolerance index and root length. With increasing salinity stress all of traits decreased، so the highest obtained from control treatment and the lowest obtained from salinity level of 16 ds/m. The genotypes respond differently to salinity levels. It seems genotypes of Zarin، Arvand and Sardari have more tolerance to salinity conditions. Genotypes of Sardari 101 and Azar 2 were sensitive to salinity stress.