Abstract
Abstract. Salicylic acid in a phenolic phytohormone with roles in plant growth and development.It also acts an endogenous signaling during biotic and abiotic stresses. Among various stresses the impacts of high frequency Electromagnetic waves (hfew) on plant growth and development have not been studied extensively.in the present study, the effect of 0.0, 0.05 and 0.1 mM salicylic acid or pretreatment of seed for 48 hrs with electromagnetic waves of high frequency (940 MHz) on plant growth and some biochemical parameters were investigated.hydrogen peroxide increased at 0.05 and 0.1 mM salicylic acid compared to control. Hydrogen peroxide also increased when seeds were pre-treated with HFEW. In contrast, carotenoids and anthocyanin content decreased in the presence of salicylic acid. Chlorophyll and carotenoids declined while antocyanin increased in pre-treated seeds with HFEW.Malondialdehyde content, as a sign of lipid peroxidation, increased in the presence of both salicylic acid and HFEW. It is concluded that high salicylic acid and HFEW cause oxidative stress in plant which can result in reduced plant growth and development.
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