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@article{1346668,
author = {Švec, Pavel and Kováčik, Jozef and Hedbavný, Josef and Babula, Petr and Rotková, Gabriela and Klejdus, Bořivoj},
article_location = {Dordrecht},
article_number = {5},
doi = {http://dx.doi.org/10.1007/s11270-016-2859-2},
keywords = {Algae; Antioxidants; Bioaccumulation; Metals; Oxidative stress},
language = {eng},
issn = {0049-6979},
journal = {Water, Air and Soil Pollution},
title = {Impact of Anions, Cations, and pH on Manganese Accumulation and Toxicity in the Green Alga Scenedesmus quadricauda},
volume = {227},
year = {2016}
}
TY - JOUR
ID - 1346668
AU - Švec, Pavel - Kováčik, Jozef - Hedbavný, Josef - Babula, Petr - Rotková, Gabriela - Klejdus, Bořivoj
PY - 2016
TI - Impact of Anions, Cations, and pH on Manganese Accumulation and Toxicity in the Green Alga Scenedesmus quadricauda
JF - Water, Air and Soil Pollution
VL - 227
IS - 5
SP - 1-9
EP - 1-9
PB - Springer
SN - 00496979
KW - Algae
KW - Antioxidants
KW - Bioaccumulation
KW - Metals
KW - Oxidative stress
N2 - Accumulation of divalent manganese (Mn) and its toxicity in the green alga Scenedesmus quadricauda was studied at circumneutral pH (6.5). A comparison of two applied concentrations (10 or 100 mu M) of MnCl2, MnSO4, and Mn(NO3)(2) indicated that mainly sulfate evoked higher Mn accumulation. On the other hand, nitrate rather depleted antioxidative enzyme activities (APX, CAT, SOD), leading to an increase in ROS formation as proven by fluorescence microscopy. Subsequent experiments revealed that increase in pH (from 4.5 to 9.5) increased also Mn content but typically depleted amounts of reduced glutathione and phytochelatin 2. We also measured the size of particles formed from the manganese salts at pH 9.5. Competitive experiment between Ca/K salts (CaCl2, CaSO4, Ca(NO3)(2), KCl, K2SO4, KNO3) and Mn (as Mn sulfate) showed a negative relation between Ca and Mn amount but KNO3 stimulated Mn accumulation. Microscopy revealed that mainly K salts elevated plasma membrane damage (Acridine orange staining). Data indicate that not only pH but also accompanying anion affects Mn accumulation and that Ca salts may affect Mn toxicity.
ER -
ŠVEC, Pavel, Jozef KOVÁČIK, Josef HEDBAVNÝ, Petr BABULA, Gabriela ROTKOVÁ a Bořivoj KLEJDUS. Impact of Anions, Cations, and pH on Manganese Accumulation and Toxicity in the Green Alga Scenedesmus quadricauda. \textit{Water, Air and Soil Pollution}. Dordrecht: Springer, roč.~227, č.~5, s.~1-9. ISSN~0049-6979. doi:10.1007/s11270-016-2859-2. 2016.
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