FLAVONOIDS AS AN ELEMENT OF ANTIOXIDANT PROTECTION POLYGONUM AVICULARE L. IN THE URBAN AREAS

The large scale of season changes in knotgrass' (Polygonum aviculare L.) accumulation of flavonoids supports the wide ecological amplitude of this species. In the literature there are data about the fact that heavy metals can either inhibit [8] and to induce the synthesis of flavonoids [2]. In this context it was of interest to identify the protective role of flavonoid complex knotweed depending on the metal content in grass and soil study plots. The following tasks were set: 1. To reveal the dependence of the microelement composition of plants grass knotweed of the total content of heavy metals in soil and the amounts available to plants forms. 2. To investigate seasonal changes in the accumulation of flavonoids grass knotweed, as well as correlation of their content with the dynamics of accumulation of heavy metals. 3. To establish the relationship between the degree of oxidative stress in the cells, the intensity of lipid peroxidation (LPO), and the content of total flavonoids. The insight between the amount of biologically active substances and the level of oxidative stress is determined. The studying of flavonoids' accumulation dynamics upon knotgrass during different vegetational phases and among various growing places is of high interest for the further understanding of human plant intervention.