Long and short term effects of plasma treatment on meristematic plant cells

In this paper, we will present results of plasma treatments of meristematic cells of Daucus carota. Plasma needle was used as an atmospheric pressure/gas composition source of non-equilibrium plasma in all treatments. Activity of antioxidant enzymes superoxide dismutase and catalase was measured immediately after plasma treatment and after two weeks following the treatment. Superoxide dismutase activity was increased in samples immediately after the plasma treatment. On the other hand, catalase activity was much higher in treated samples when measured two weeks after plasma treatment. These results show that there is a direct proof of the triggering of signal transduction in the cells by two reactive oxygen species H2O2 and O-2(-), causing enzyme activity and short and long term effects even during the growth of calli, where the information is passed to newborn cells over the period of two weeks. (C) 2014 AIP Publishing LLC.Ministry of Education, Science and Technological Development, Republic of Serbia {[}III41011, ON171037, ON173024