Effect of salicylic acid and seed weight on germination of Wheat (CV. BC ROSHAN) under different levels of osmotic stress

To study the effect of salicylic acid and seed weight on Wheat germination (CV. BC ROSHAN) under different levels of osmotic stress, an experiment was conducted in the research laboratory of Shahid Chamran University of Ahvaz, Iran in 2012. The experimental design was factorial based on completely randomized design (CRD) with three replications. The treatments was included of salicylic acid (SA) (1mM without and with using) 1000 weight kernel and four levels of osmotic stress by PEG (Polyethylene glycol). In this experiment, in standard germination test traits of seed germination percentage, germination rate and in seedling growth test traits of seedling length and dry weight of seedlings have been measured. The results showed that osmotic stress decreased seed germination of wheat cultivars in general concentration of PEG (12 bar) and 1000 Weight kernel (22 gr) decreased germination over % as compared with control. Also, the SA increased the seedling length and dry weight of seedlings. SA increased length and weight of radicle and plumule in treatments of low seed weight (1000 grain weight =22 g).The lowest germination index were also observed in the treatment of severe stress and without pre-treated with SA and minimum seed weight.

Germination, Osmotic stress, Salicylic acid, Seed weight, Wheat