Influence of industrial emissions on morphological signs of leaves of greening plants

Currently, studies of the industrial environment and related theoretical and applied environmentalproblems are undoubtedly relevant. Therefore, the indicators of environmental monitoring of greening tree speciesare the main indicators of the ecological situation in the industrial zones of the arid zone of the South of Uzbekistan.The article investigates the effect of SO2 on the morphometric index of leaf blades of some planted trees. Based onthe information collected, a morphometric indicator of leaf blades and its relationship with the concentration ofsulfur in the atmosphere are provided. Based on the changes in morphological and anatomical and some biologicalindicators, the degree of stability of greening species is revealed. The results obtained can be used in monitoringgreen spaces of industrial regions, as well as for predicting the effects of environmental pollution. The researchresults can serve as a scientific basis for the selection and regionalization of tree species for landscaping theindustrial centers of the arid zone. According to our observations, changes in signs towards xeromorphy show adirect relationship with gas resistance, because these indicators depend on the structural features of the leaf blade.In particular, xeromorphic signs are the following: a decrease in the leaf blade, an increase in pubescence, anincrease in the number of stomata per mm2, length of venation, etc. We recommend using ash for landscapingstreets and parks in the arid zone. Due to the high decorative and drought-resistant properties, they should be usedin group, linear, alley, as well as mixed plantings. Considering gas resistance, drought resistance, as well as salttolerance of elm and quince, we recommend using them for landscaping industrial regions, as well as for plantingshelterbelts. In large industrial centers, we recommend using maple, ash and elm for landscaping, as they have moreresistant signs to toxicants, in particular to sulphurous anhydride. The analysis of the obtained research dataallows stating that there is a relationship between the concentration of sulphurous anhydride and the morphometricindicators of leaf blades of greening trees in industrial zones.