Antioxidant capacity of sage grown on heavy metal-polluted soil |
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Authors: | I Stancheva M Geneva M Hristozkova Y Markovska I Salamon |
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Institution: | 1.Acad. M. Popov Institute of Plant Physiology,Bulgarian Academy of Sciences,Sofia,Bulgaria;2.Faculty of Biology,Sofia University “St. Kliment Ohridski”,Sofia,Bulgaria;3.Faculty of Humanities and Natural Science,Presov University,Presov,Slovakia |
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Abstract: | Oxidative stress response and essential oil composition of sage (Salvia officinalis L.), grown on industrially polluted soil were studied. Sage plants were grown on the soil polluted with Cd, Cu, Pb, Zn, and
non-polluted control soil. One-year-old sage possessed a high potential for heavy metal accumulation mainly in the roots.
Heavy metal pollution resulted in root and shoot dry biomass inhibition. The increased levels of hydrogen peroxide and MDA
showed that the heavy metal uptake caused oxidative stress. The increase towards the control was observed in the levels of
glutathione, ascorbate, dehydroascorbate, catalase, dehydroascorbate reductase, and glutathione peroxidase. Weak activities
of the most enzymes of the ascorbate-glutathione cycle allowed to suppose that H2O2 neutralization is rather non-enzymatic than enzymatic process. Observed decline in α- and β-thujones and elevated camphor
content in the sage leaves did not indicate a deterioration of the essential oil quality. Sage grown on heavy metal-polluted
soil successfully accumulated cadmium, lead, and zinc, which is resulted in plant biomass inhibition, but essential oil yield
and quality was not declined. |
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