Effect of salicylic acid pre-treatment on cucumber and watermelon seeds germination under salt stress

Document Type : Research Paper

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Abstract

Salinity is one of the most important environmental stresses that affect the growth and yield of plants. To study the effect of salinity and salicylic acid on germination of cucumber (Cucumis sativus cv. Super Dominus) and watermelon (Citrullus lanatus cv. Crimson Sweet) seeds, two factorial experiments were conducted in a completely randomized design with three replications. Treatments consisted of four levels of salinity (0, 2, 4, 6 ds/m sodium chloride) and three levels of salicylic acid (0, 0.5, 1 mM). The results showed that salinity significantly reduced seed germination and seedling growth. The lowest values of germination rate in cucumber (18.79) and watermelon (10.33), germination percentage in cucumber (86.65 percent) and watermelon (69.63) and seed vigor index in cucumber (17.93) and watermelon (9.59) was observed in 6 ds/m level of salinity. Salicylic acid improved germination parameters in both plant. The highest seed germination (97.98 percent) was obtained in the 1 mM level of SA under control condition. According to the results, pretreatment of cucumber and watermelon seeds by 1 mM SA can be proposed to improve seed germination and growth rate of seedling under salinity.

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References

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Iranian Journal of Seed Sciences and Research
Volume 3, Issue 4
January 2017
Pages 15-27

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