The effect of salicylic acid on the reduction of potato virus X damage in Solanum tuberosum

Document Type : Research Paper

Authors

• M.R. Hadi
• M.R. Moosavi

Abstract

In this study, in order to reduce the pathogenesis of potato virus X (PVX) in two potato (Solanum tuberosum L.) cultivars (Marfona and Agria), the effects of salicylic acid on growth parameters (chlorophyll content, leaf area, distance between nodes, number of leaves, stem length, number and weight of tubers) were investigated under greenhouse conditions. Healthy potato plantlets were propagated and transferred to pots containing suitable and sterilized soil.  The plantlets were sprayed with different concentrations (0, 0.2, 0.5, 1 and 2 mM) of salicylic acid weekly at the rate of 10 ml per plant and for 4 weeks. The leaves of experimental plants were inoculated with PVX, extracted from infected tobacco leaves. Although viral infection symptoms on tobacco were manifested as leaf rippling, no such symptoms were visible on infected potato leaves. Results showed that salicylic acid content in infected plants was about twice that in healthy control plants. Also, treatments with 0.2 and 0.5 mM of salicylic acid resulted in 27.25% reduction in potato damage. Moreover, our study revealed that Marfona cultivar was more resistant to PVX than Agria cultivar.
 

Keywords

• Solanum tuberosum
• Salicylic acid
• Potato Virus X

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