ISSN 1995-4301

ISSN 2618-8406

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Statistical analysis of the relationship between heavy metal accumulation and plants biochemical responses in the urban area

A.S. Petukhov, T.A. Kremleva, N.A. Khritokhin, G.A. Petukhova
Section: Chemistry of natural environments and objects
This study is devoted to heavy metal accumulation (Cu, Zn, Fe, Mn, Pb, Cd, Ni, Co, Cr) in soils and coltsfoot leaves from the industrial area of Tyumen impact on biochemical parameters of plants. Regression and factor analysis were conducted using data of heavy metal concentration in coltsfoot, heavy metals mobile and acid-soluble fraction in soils, and biochemical parameters (concentration of photosynthetic pigments, lipid peroxidation products, phenols, flavonoids, activity of catalase and peroxidase). Samples were collected during 2017–2020 in Tyumen at areas with different pollution level (n = 28). Regression analysis established equations linking photosynthetic pigments content with Cu, Fe, Mn, and Zn concentration in soils and coltsfoot. Phenolic antioxidants negatively correlate with Cu and Mn content in plants. Regression equations allow predicting Fe, Zn, and Cu concentration in coltsfoot by its content in the soil. Factor analysis revealed photosynthetic pigments to be the most important biochemical parameter in plants adaption to heavy metal accumulation. Probably, this is due to plants’ elevated need in energy in polluted conditions. According to factor analysis, Pb accumulation in plants contributes the most to the biochemical change. Cd and Pb concentration in soil mostly conditions plants stress from heavy metal soil pollution.
Keywords: heavy metals, soils, plants, photosynthesis, antioxidants, urban area

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Article published in number 1 for 2023
DOI: 10.25750/1995-4301-2023-1-083-092
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The journal was founded in 2007