Changes in the phytohormonal system during the development of antivirus resistance was investigated. This resistance was induced by arachidonic acid (AA) in potato plants (Solanum tuberosum L.) grown in vitro. The plants in tubes were treated with AA 7 days before infection with tobacco mosaic virus or potato X virus. These plants were used for ABA, IAA, and cytokinin quantification. As a rule, phytoviruses increased ABA and cytokinin levels and decreased that of IAA in both immunized and unimmunized plants. AA significantly decreased the phytovirus content in potato plants at least during 3 weeks. In general, AA immunization acted as a limiting factor for increasing the ABA and cytokinin concentrations during virus pathogenesis in experimental plants. However, no regularity in the changes of the IAA concentration was noted. The data obtained showed that AA-induced changes in the hormonal system could be an important factor in the mechanism of plant resistance against phytopatogenic viruses.
Russian Journal of Plant Physiology – Springer Journals
Published: Mar 24, 2006
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