engleski

Effects of potato spindle tuber viroid infection on phytohormone and antioxidant responses in symptomless Solanum laxum plants

In order to better understand the role of phytohormones and antioxidant enzymes in plant- viroid interaction, changes in endogenous phytohormones content and activities of key antioxidant enzymes during latent infection of Solanum laxum by potato spindle tuber viroid (PSTVd) were examined. The results showed that the endogenous jasmonic acid (JA) and castasterone (CS) content significantly increased, while abscisic acid content significantly decreased in symptomless leaves of systemically infected plants compared to that of mock-inoculated control plants 9 weeks after inoculation. Regarding endogenous salicylic acid and indole-3-acetic acid content, there were no differences between infected and control plants. PSTVd infection also enhanced the activity of ascorbate peroxidase and superoxide dismutase, while the activity of catalase remained steady. Results suggested the involvement of JA, CS and antioxidant enzymes in the physiological response of S. laxum during latent infection by PSTVd.

Abscisic acid ; Brassinosteroids ; Jasmonic acid ; Latent infection ; Peroxidase ; PSTVd

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