PJB-2018-815
The Effect of Priming on Germination and Primary Growth Indices of Lallemantia iberica Fisch. & C.A.Mey Under Salinity
mansureh ghavam
Abstract
This research is conducted to study the effect of priming by chemical hormones on the medicinal plant seeds of Lallemantia iberica in early growth stages, and also its effects on germination indices and its role in the reduction of negative effects of environmental stresses under salinity and drought conditions using factorial experiment based on completely randomized design with four replications in two separate tests, which was done in the laboratory of agricultural educational center of East Azerbaijan, Tabriz in 2015. The first factor in both tests comprised priming with Salicylic acid in three levels (100, 200, 300 mg/lit.), ascorbic acid (100, 200, 300 mg/lit), Auxin in three levels (50, 100, 150 ppm), and distilled water as the control. The second factor comprised salinity test with 6 levels of sodium chloride (0, 0.2, 0.4, 0.8, 1.2, 1.8 mol/lit.), and drought test with 5 levels of Ethylene glycol (0, -0.3, -0.6, -0.9, -1.2 megapascal). Lab results were analyzed using SAS software and statistical method of CRD. Variance analysis results showed that priming and salinity and drought treatments had significant effect on germination characteristics of Lallemantia iberica (M. Bieb.) & C.A.Mey Fisch seeds at 1% significance level, and drought and salinity stress had inhibiting effect on germination characteristics of Lallemantia iberica (M. Bieb.) & C.A.Mey Fisch seeds, while the negative effect of these stresses on priming-received seeds was remarkably weaker than seeds with no priming. Maximum germination percentage was seen in 25°C..
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