Influence of oligomeric silicic and humic acids on aluminum accumulation in a freshwater grazing invertebrate

Faculty Science Year: 2002
Type of Publication: ZU Hosted Pages: 382–387
Authors:
Mahmoud Mahmoud Ahmed Desouqy
Journal: Ecotoxicology and Environmental Safety Ecotoxicology and Environmental Safety Volume: 53
Keywords : Influence , oligomeric silicic , humic acids , aluminum accumulation    
Abstract:
This study examined the influence of oligomeric silicic acid and humic acid on aluminum in the water column and its accumulation in the freshwater snail Lymnaea stagnalis. Forty-eight hours after addition of Al (500 mgL1), 83% of the metal was lost from the water column. This loss was reduced by oligomeric silica (20 mg L1) and by humic acid (10 mg L1). Aluminum accumulated in the digestive gland and, to a lesser extent, in the remaining soft tissues, and this accumulation was reduced by oligomeric silica. In the presence of humic acid, Al accumulation in the digestive gland was unaffected, though less was accumulated in the remaining tissues. Snails accumulated Si preferentially in the digestive gland and this accumulation was increased in the presence of added Al. Thus, both oligomeric silica and humic acid influence Al bioavailability and Si is upregulated in the digestive gland in the presence of Al.
    
     
 
       

Author Related Publications

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  • Mahmoud Mahmoud Ahmed Desouqy, "Effect of orthosilicic acid on the accumulation of trace metals by the pond snail Lymnaea stagnalis", Aquatic Toxicology, 2002 More
  • Mahmoud Mahmoud Ahmed Desouqy, "Morphology, histology, histochemistry and fine structure of venom apparatus of the medically relevant Scorpion, Leiurus quinquestriatus", Bioscience Research, 2020 More
  • Mahmoud Mahmoud Ahmed Desouqy, "Tissue distribution and subcellular localization of trace metals in the pond snail Lymnaea stagnalis with special reference to the role of lysosomal granules in metal sequestration", Aquatic Toxicology, 2006 More
  • Mahmoud Mahmoud Ahmed Desouqy, "Aluminum-dependent regulation of intracellular silicon in the aquatic invertebrate Lymnaea stagnalis", PNAS, USA, 2002 More

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  • Iman Hassan Mohammed Sheikh, "Scanning Electron Microscopic Studies of Gill Arches and Rakers in Relation to Feeding Habits of Some Fresh Water Fishes", Elsevier, 2013 More
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