CHANGE IN THE MESOSTRUCTURAL CHARACTERISTICS OF THE LEAF OF SMALL-LEAVED LINDEN UNDER CONDITIONS OF TECHNOGENIC POLLUTION (ON THE EXAMPLE OF NABEREZHNYE CHELNY)

The article presents the results of a research of the mesostructural indicators of small-leaved linden leaves in different ecological types of urban plantations. The research was carried out in Naberezhnye Chelny, one of the leading centers of machine building in Russia, where the township-forming enterprise is PJSC “Kama Automobile Plant”. Small-leaved linden is widely used in landscaping of the city. Under the urban environment small-leaved linden exhibits significant increases in anthropogenic load (mainly, with an increase in the API value and formaldehyde content), the number of mesophyll cells and their linear sizes increase.