Combined Effect of Mn(II) and Resorcinol on Duckweed

This study explores the combined toxic effect of Mn(II) and resorcinol (0.01 n and 0.2 n) on duckweed (Lemna minor). During the acute experiments, the plants released electrolytes into the aquatic environment after 30 min of exposure to the toxicants, indicating a disruption of tissue permeability a...

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Bibliographic Details
Published in:	Uchenye zapiski Kazanskogo universiteta. Serii͡a︡ Estestvennye nauki Vol. 166; no. 1; pp. 66 - 81
Main Authors:	E. V. Stolpovskaya, V. O. Sukhovnina, G. O. Zhdanova, O. A. Barkhatova, A. D. Stom, M. N. Saksonov, A. B. Kupchinsky, T. S. Lozovaya, M. Yu. Tolstoy, S. N. Filippova, D. I. Stom
Format:	Journal Article
Language:	English
Published:	Kazan Federal University 15-03-2024
Subjects:	biotesting combined action electrical conductivity lemna minor membrane permeability mn(ii) resorcinol toxicity
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Summary:	This study explores the combined toxic effect of Mn(II) and resorcinol (0.01 n and 0.2 n) on duckweed (Lemna minor). During the acute experiments, the plants released electrolytes into the aquatic environment after 30 min of exposure to the toxicants, indicating a disruption of tissue permeability as a test response. The experiments showed that the toxicity of the equinormal mixtures of resorcinol and Mn(II) (0.2 n each) increased relative to their single solutions. This was observed both in the freshly prepared solutions and in the solutions stored for 20 h prior to the experiments. The change in the UV absorption spectra indicates that there was complexation or other interaction between resorcinol and Mn(II) at equinormal concentrations (0.01 n). At the Mn(II) : resorcinol ratio of 1:20 (0.01 n Mn(II) and 0.2 n resorcinol), the toxicity of the system to duckweed decreased compared to the separate effects of these substances. The results obtained highlight the importance of considering the interactions between heavy metals and phenolic compounds when assessing the quality of aquatic environments.
ISSN:	2542-064X 2500-218X
DOI:	10.26907/2542-064X.2024.1.66-81