Metals and linear alkylbenzene sulphonate as inhibitors of the algae Pseudokirchneriella subcapitata acid phosphatase activity

Sewage sludge applied to soils as a fertilizer often contains metals and linear alkylbenzene sulphonate (LAS) as contaminants. These pollutants can be transported to the aquatic environment where they can alter the phosphatase activity in living organisms. The acid phosphatase of algae plays importa...

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Veröffentlicht in:Ecotoxicology (London, England). - 1992. - 18(2009), 5 vom: 21. Juli, Seite 610-9
1. Verfasser: Jonsson, Claudio Martín (VerfasserIn)
Weitere Verfasser: Paraiba, Lourival Costa, Aoyama, Hiroshi
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2009
Zugriff auf das übergeordnete Werk:Ecotoxicology (London, England)
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Algal Proteins Alkanesulfonic Acids Metals, Heavy Water Pollutants, Chemical alkylbenzyl sulfonic acid Acid Phosphatase EC 3.1.3.2
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245 1 0 |a Metals and linear alkylbenzene sulphonate as inhibitors of the algae Pseudokirchneriella subcapitata acid phosphatase activity 
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520 |a Sewage sludge applied to soils as a fertilizer often contains metals and linear alkylbenzene sulphonate (LAS) as contaminants. These pollutants can be transported to the aquatic environment where they can alter the phosphatase activity in living organisms. The acid phosphatase of algae plays important roles in metabolism such as decomposing organic phosphate into free phosphate and autophagic digestive processes. The order of in vitro inhibition of Pseudokirchneriella subcapitata acid phosphatase at the highest concentration tested was LAS > Hg2+ = Al3+ > Se4+ = Pb2+ > Cd2+. A non-competitive inhibition mechanism was obtained for Hg2+ (Ki = 0.040 mM) and a competitive inhibition for LAS (Ki = 0.007 mM). In vivo studies with treated algae cultures showed that the inhibition of specific activity was observed in algae exposed during 7 days, in contrast to short term (24 h) treatments with both these chemicals. Our results suggest that the inhibition parameters in vitro did not markedly differ between the two chemicals. On the other hand, in vivo evaluations showed strong differences between both pollutants regarding the concentration values and the degree of response 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 7 |a Algal Proteins  |2 NLM 
650 7 |a Alkanesulfonic Acids  |2 NLM 
650 7 |a Metals, Heavy  |2 NLM 
650 7 |a Water Pollutants, Chemical  |2 NLM 
650 7 |a alkylbenzyl sulfonic acid  |2 NLM 
650 7 |a Acid Phosphatase  |2 NLM 
650 7 |a EC 3.1.3.2  |2 NLM 
700 1 |a Paraiba, Lourival Costa  |e verfasserin  |4 aut 
700 1 |a Aoyama, Hiroshi  |e verfasserin  |4 aut 
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