HORMONAL STATUS AND ACTIVITY OF THE ANTIOXIDANT SYSTEM OF SOLANUM TUBEROSUM UNDER THE ACTION OF COLCHICINES AS THE INHIBITOR OF MICROTUBULE.

The content and the ratio of phytohormones, the activity of enzymes-antioxidants and lipid peroxidation, contents of proline and carotenoids in potato plants under the action of colchicines have been investigated. We have identified specific changes in hormonal balance of the plant initiated by the destructor of microtubules, colchicines (1 mM). We have found significant decreased in the amount of indoleacetic acid and zeatin, increase in the content of abscisic acid, no changes in the level of gibberellic acid, a decreased in the ratio between hormones-stimulants and abscisic acid. At this hormonal background, we observed activation of low molecular weight antioxidant system (increased levels of proline and carotenoids), while the peroxidase activity decreased slightly, and catalase activity did not change. Monitoring of reactions of lipid peroxidation showed the activation of its initial stages (accumulation of hydroperoxides), and then the process stabilized (the level of malondialdehyde did not change). We have concluded that the formation of hormonal status Solanum tuberosum, as well as the work of the antioxidant system, depend on the structural condition of the tubulin cytoskeleton.