Comptes rendus de l’Acade'mie bulgare des Sciences, Vol 74, No7, pp.1091-1097

Effects of Triacontanol on Pepper Plants Infected with Tomato spotted wilt virus (TSWV)

Irina Moskova, Iskren Sergiev, Elisaveta Kirova, Bistra Dikova


The Tomato spotted wilt virus (TSWV) induces disease in tomato, pepper, tobacco, and a number of other crop and wild plant species

The effects of plant growth regulator triacontanol on young pepper plants infected with TSWV were studied. Triacontanol was applied before or after infection with the virus. The rate of TSWV infection was quantified by Enzymelinked immunosorbent assay, Double antibody sandwich (DAS-ELISA). In relation to the symptoms of leaf disease, the optical density of TSWV and the relative water content were measured. To assess the level of oxidative stress, the contents of free proline and malondialdehyde in the leaves were determined.

It was found that triacontanol decreased the optical density of TSWV and its effect was better expressed when the plant growth regulator was applied before the infection. In regard to cell water loss and the stress markers proline and malondialdehyde, both treatments were effective in equal degree, with values in TSWV infected and triacontanol treated plants close to the control levels.

Key words: triacontanol (TRIA), Tomato spotted wilt virus (TSWV), pepper plants, oxidative stress

DOI: 10.7546/CRABS.2021.07.17