The activity of histone acetyltransferase (HAT), histone deacetylase (HDA), content of reactive oxygen species (ROS) and antioxidant activity of ascorbate peroxidase (AP), catalase (CAT) and thioredoxin (TP) in the callus culture of А. thaliana at the early stages of acute osmotic stress have been investigated. It is established that under the stress took place an increase in HAT, HDA activities and the ROS content, especially H2O2, and the activity of AP, Cat and TR. The data obtained are discussed in aspect of genome expression regulation and role of redox signaling in generation of plant cells stress response.
Keywords: Arabidopsis thaliana, callus culture, histone acetyltransferase, histone deacetylase, reactive oxygen species, ascorbate peroxidase, catalase, thioredoxin, osmotic stress
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