| Abstract:
In order to study the salinity effects on ten genotypes of St. Johns Wort (Hypericum perforatum L.) this study conducted in 2009 at seed technology lab of Islamic Azad University, Shahr-e-Rey Branch, in the basis of completely randomized design including salinity levels of 0, 100, 200 and 300 mM Nacl treatments with three replications.
The experimental Laboratory characters contains: percentage and speed of germination, length of root and shoot, length of plantlet, ratio of Soot/Root, seed vigour. The result showed that salinity had significant different (P<0/01) on all of characters. Also, jannat genotype didn’t have any germination in 200 and 300 mM of Nacl. This genotype in the case of all characters except ratio of Soot/Root had higher resistance than other genotypes.
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