Publication details

Calcium has protective impact on cadmium-induced toxicity in lichens

Authors

KOVACIK Jozef DRESLER Slawomir BABULA Petr HLADKY Juraj SOWA Ireneusz

Year of publication 2020
Type Article in Periodical
Magazine / Source Plant Physiology and Biochemistry
MU Faculty or unit

Faculty of Medicine

Citation
Web https://www.sciencedirect.com/science/article/pii/S0981942820304964?via%3Dihub
Doi http://dx.doi.org/10.1016/j.plaphy.2020.10.007
Keywords Antioxidants; Fungi; Heavy metals; Microscopy; Reactive oxygen species
Description Eventual protective action of calcium (Ca, 100 or 1000 mu M) against cadmium (Cd, 10 or 100 mu M) toxicity in common lichen Hypogymnia physodes after 24 h of exposure was studied. Total Cd reached 482 and 2801 mu g/g DW in 10 and 100 mu M Cd treatments while Ca content reached over 23 mg/g DW in 1000 mu M Ca treatment. Ca suppressed Cd accumulation by 23 and 38% in total fraction and completely in absorbed fraction. Fluorescence microscopy of Cd and Ca ions revealed good correlation with quantitative data. Cd stimulated increase in ROS formation and lipid peroxidation as detected using fluorescent reagents and quantification of H2O2 while co-application of Ca suppressed these effects. Formation of nitric oxide was mainly affected by cadmium. Cd depleted amount of amino acids but proteins or phenols remained unaffected by Cd or Ca. On the contrary, sum of thiols, reduced glutathione and ascorbic acid were depleted by Cd but reversed mainly by higher Ca dose. Among organic acids, only Cd-induced depletion of citric acid content was reversed by Ca. Data indicate that ameliorative effect of Ca under Cd excess in lichens is comparable with effect in plants and metabolic responses in various life lineages are discussed.

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