The content of photosynthetic pigments in thallomas of Parmelia sulcata Taylor in recreational areas of the city of Tver and the Spirovsky district of the Tver region

Abstract

To date, the assessment of the qualitative and quantitative content of assimilating pigments in lichen thallomas is one of the most common indicators for identifying the degree of damage to these organisms in conditions of environmental pollution. The aim of the work is to assess the content of photosynthetic pigments (chlorophyll a and b) in the thallus of Parmelia sulcata Taylor lichen in the ecosystems of Tver and the Spirovsky district of the Tver region with varying degrees of anthropogenic transformation. The study of the pigment content in the samples of lichen P. sulcata collected in the recreational areas of the city of Tver and the village of Spirovo with different levels of anthropogenic transformation and pollution. Significant differences in the content of chlorophylls a and b were found, which indicates a high plasticity of the photosynthetic system. The level of Cl a content in recreational areas is higher than in background conditions. The high variability of the values of the concentrations of Cl b indicates the priority value of the pigment system during adaptation.