Morphometric analysis of the annual shoot of the Acer negundo L. plants, growing in conditions of exposure to technogenic pollution of Donbass

For estimation of quality of the environment in industrial regions, along with the methods of instrumental analysis, the methods of bioindication are rather relevant, foremost phytoindication. The influence of air pollutants during ontogenesis results in violation of normal vital functions of arboreal plants, the integral index of the vital state of which is the intensity of vegetative growth. Parameters, characterizing the plant growth, can be quite informative for the bioindication of level of the technogenic contamination of environment. This article presents the results of analysis of coke production emissions influence and transport on the morphometric indexes of annual vegetative shoots of Acer negundo L. It is shown that the influence of airpollutants leads to inhibition of the development of annual shoot. The reduction in the length of annual shoot (22–26%) and the number of its structural elements is accompanied by a decrease in mass (33–49%) and area (27–45%) of leaves, indicating xerophytization of shoots under the influence of emissions. The greatest changes are revealed in A. negundo trunk from plantations, experiencing, along with the influence of exhaust gas, the extremely adverse conditions of root nutrition. High sensitivity to technogenic emissions of such morphometric parameters of A. negundo as the length of annual shoots, the total weight and area of shoot leaves allows to use them in monitoring researches of vegetation condition and environmental pollution in the industrial regions.