Some hormonal priming effect on germination and seedling growth Lallemantia iberica Fisch. & C.A.Mey in drought stress conditions

One of the consequences of the prevailing drought, reduced water potential in the field of seeds. High negative water potential, especially in the early stages of germination, leading to reduced water uptake by seeds and prevent the continuation of the process of germination..This research is conducted to study the effect of priming by chemical hormones on the medicinal plant seed of Lallemantia in early growth stages, and also its effect on germination indexes and its role in the reduction of negetive effects of environmental stresses under draught conditions, in factorial form based on completely randomized design with four repeats, which was done in the labrotory of agricultural educational center of East Azarbijan, Tabriz in 2015. The first factor in both tests comprised priming with salicilic acid in three levels (100, 200, 300 mg/lit.), ascorbic acid (100, 200, 300 mg/lit), and oxin in three levels (50, 100, 150 ppm), and distilled water as control. The second factor comprised draught test with 5 levels of Ethylene glycol( 0, -0.3, -0.6, -0.9, -1.2 megapascal). Lab results were analysed usind SAS software and statistical method of CRD. Variance analysis results showed that priming and draught treatments had significant effect on germination characteristics of Lallemantia seed at 1% sigificance level, while the negetive effect of these stresses on priming-received seeds was remarkabaly weaker than seeds whith no priming. Among all pre-treatments used, maximum effect on Lallemantia germination characteristics in stress conditions under study, attributed to salicilic acid 200 mg/lit., and minimum effect to oxin 50 ppm.