ВЛИЯНИЕ СТРЕССОВ НА ИЗОФОРМЫ ПЕРОКСИДАЗ ТОМАТОВ

Abstract

Native electrophoresis was used to study changes in the composition and relative content of peroxidase isoforms in the leaves of 4 tomato varieties under the influence of water and thermal stresses in the offspring of plants infected with viral agents (tobacco mosaic virus, TMV and tomato aspermia virus, VAT). Under the stress conditions no additional zones of peroxidase iso forms were detected in the electrophoretic spectra. However, changes in the intensity of certain peroxidase zones were noted. Tomato genotypes Jacota and S. pimpinellifolium demonstrated the most significant increase in peroxidase activity, which was reflected in an increase of the intensity of isoforms zones with average molecular weight under conditions of temperature and water stress. In the progeny of tomato plants infected with TMV and BAT, the aftereffect of the viral infection was accompanied by an increase in peroxidase activity of isoform zones with average molecular weight in susceptible varieties (Jacota, Mary Gratefully), whereas in the progeny of infected tomato variety Rufina, which carries resistance genes to TMV, and in the wild variety S. pimpinellifolium, zones with low molecular weight are increased.