THE SPECIES SPECIFICITY CHANGES CUTICULAR LIPIDS AND LIPID PEROXIDATION PROCESSES IN LEAVES OF WOODY PLANTS IN INDUSTRIAL ENVIRONMENTS

Abstract

It was found that in the industrial conditions all species at the end of vegetation period most intensively accumulate zinc. The highest phytoextraction capacity for most heavy metals was in P. italica, whereas A. negundo and A. hippocastanum was characterized by average rate of heavy metals accumulation. Polyelement environmental pollution is excessive accumulation of heavy metals in leaves of woody plants resulted in the lipid peroxidation activation. A slight increase in the P. italica leaves TBA-active compounds content at the high level of heavy metals accumulating evidence of sufficient low intensity of free radical processes in their cells. On the other hand, referred toxicants, even at minimal concentrations, led to intensification of lipid peroxidation in assimilation organs A. hippocastanum, as shown by over 3 times increase in the contents of TBA-active products. In response to the heavy metals, stressful effects occur restructuring in composition of the leaves cuticle surface layer of woody plants. Enough informative indicator of the crystal structure of the cuticle surface lipids are terpenoids. Moreover, A. negundo was characterized by a variety of terpenoid compounds range. A common feature for species with an average rate of majority toxins accumulation was an increased content of almost all groups of terpenoids and especially medium-polar. In P. italica (species with a high phyto extraction potential of studied heavy metals) their amount decreased.