TY - JOUR
T1 - Effect of aluminum on cellular division and photosynthetic electron transport in euglena gracilis and chlamydomonas acidophila
AU - Perreault, François
AU - Dewez, David
AU - Fortin, Claude
AU - Juneau, Philippe
AU - Diallo, Amirou
AU - Popovic, Radovan
PY - 2010
Y1 - 2010
N2 - The present study investigated aluminum's effect on cellular division and the photosynthetic processes in Euglena gracilis and Chlamydomonas acidophila at pH 3.0, at which Al is present mostly as Al3+, AlSO4 +, and Al(SO4)2-. These algal species were exposed to 100, 188, and 740 μM Al, and after 24 h cell-bound Al was significantly different from control only for the highest concentration tested. However, very different effects of Al on algal cellular division, biomass per cell, and photosynthetic activity were found. Aluminum stimulated cell division but decreased at some level biomass per cell in C. acidophila. Primary photochemistry of photosynthesis, as Photosystem II quantum yield, and energy dissipation via nonphotochemical activity were slightly affected. However, for E. gracilis, under the same conditions, Al did not show a stimulating effect on cellular division or photosynthetic activity. Primary photochemical activity was diminished, and energy dissipation via nonphotochemical pathways was strongly increased. Therefore, when Al is highly available in aquatic ecosystems, these effects may indicate very different response mechanisms that are dependent on algal species.
AB - The present study investigated aluminum's effect on cellular division and the photosynthetic processes in Euglena gracilis and Chlamydomonas acidophila at pH 3.0, at which Al is present mostly as Al3+, AlSO4 +, and Al(SO4)2-. These algal species were exposed to 100, 188, and 740 μM Al, and after 24 h cell-bound Al was significantly different from control only for the highest concentration tested. However, very different effects of Al on algal cellular division, biomass per cell, and photosynthetic activity were found. Aluminum stimulated cell division but decreased at some level biomass per cell in C. acidophila. Primary photochemistry of photosynthesis, as Photosystem II quantum yield, and energy dissipation via nonphotochemical activity were slightly affected. However, for E. gracilis, under the same conditions, Al did not show a stimulating effect on cellular division or photosynthetic activity. Primary photochemical activity was diminished, and energy dissipation via nonphotochemical pathways was strongly increased. Therefore, when Al is highly available in aquatic ecosystems, these effects may indicate very different response mechanisms that are dependent on algal species.
KW - Acid environment
KW - Algae
KW - Aluminum
KW - Photosynthesis
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U2 - 10.1002/etc.109
DO - 10.1002/etc.109
M3 - Article
C2 - 20821518
AN - SCOPUS:77951028138
SN - 0730-7268
VL - 29
SP - 887
EP - 892
JO - Environmental Toxicology and Chemistry
JF - Environmental Toxicology and Chemistry
IS - 4
ER -