اثر پیش تیمار سالیسیلیک اسید بر رشد گیاهچه چای ترش تحت تنش خشکی

In order to evaluate the effect of salicylic acid pretreatment on germination indices of Hibiscus sabdariffa under drought stress, a experiment arranged as factorial in RCBD design with three replications at Research Station of Shahrekord University in 2013. The first factor include different concentrations of salicylic acid in four levels (0, 0/5, 1 and 1/5 mM) and the second factor of drought in four levels (0, -2, -4 and -6 bar). The results showed that with increasing drought stress radicle length, plumule lenght, seedling dry weight and allometry coeficient is significantly decreased. Seed priming with salicylic acid, which increases the resistance of plants versus drought. Higher concentrations of salicylic acid seems to increase in all the parameters studied were in the control and stress condition. So to apply the protective compounds cause improvement of seedling Roselle under the drought stress.