TY JOUR TI Plant extracts in protection of photosynthetic pigments in oxidative stress KW chlorophyll а and b KW heavy metals KW oxidative stress KW reactive oxygen species KW antioxidants JO Russian Journal of Biological Physics and Chemisrty AU Dadashova, S.B. AU Kurbanova, I.M. PY 2021 IS 6 PB Federal State Educational Institution of Higher Education Sevastopol State University