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Effects of salinity and salicylic acid pretreatment on germination and seedling growth of Artichoke (Cynara scolymus L)

Abstract

In order to study the effect of salinity and salicylic acid treatments on seed germination characteristics of artichoke, a laboratory study was conducted in Agriculture and Natural Resources Research Center, Hamadan. The test was implemented in factorial experiments based on a completely randomized design with three replications. The first factor was salicylic acid in 4 levels (0, 0.5, 1 and 1.5 mM) and the second factor was sodium chloride (NaCl) solution in 4 levels (0, 50, 100 and 150 mM). Before sowing, seeds were soaked in salicylic acid solution for 24 h. Then, seeds were sown in sterile Petri-dishes, containing 5 ml sodium chloride solution (with treatment concentrations). Artichoke seed germination parameters such as germination percentage, root length, shoot length, root and shoot dry weight were evaluated. The results showed that with increasing in NaCl concentration in different treatments, seed germination, root and shoot lengths and fresh and dry weight of seedlings reduced. Therefore, the concentration of 150 mM of NaCl reduced germination percent (84.58%) in compared to the control treatment. In addition, salicylic acid had positive effect on germination percent and biomass, so that it adjusted salinity tension in seedlings. Pretreatment of salicylic acid reduced root and shoot lengths but root and shoot dry weights increased in compared to control.

Keywords

Salicylic Acid; Germination; Salinity; Artichoke; Seedling Growth

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