Nom du corpus

Corpus Systématique Animale

Titre du document

Fundamental roles of biological barriers in mercury accumulation and transfer in freshwater ecosystems (analysis at organism, organ, cell and molecular levels)

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Poissons_v2b_004862
Auteur(s)
  • A. Boudou 1
  • M. Delnomdedieu 1,2
  • D. Georgescauld 2
  • F. Ribeyre 1
  • E. Saouter 1
Affiliation(s)
  • 1) Laboratoire d'Ecologie fondamentale et Ecotoxicologie, URA CNRS 1356, UFR de Biologie, Université de Bordeaux I, 33405, Talence Cedex, France
  • 2) Centre de Recherche Paul Pascal, CNRS, Château Brivazac, 33600, Pessac Cedex, France
Résumé

In the framework of an ecotoxicological approach to the processes of bioaccumulation and transfer of Hg in freshwater systems, we present a synthesis of our experimental studies concerning the interactions between inorganic Hg and MeHg and biological barriers- at organism and organ levels : three biological models are selected: fish (Salmo gairdneri), burrowing mayfly nymphs (Hexagenia rigida) and rooted macrophytes (Elodea densa, Ludwigia natans). Results show strong specificities of the biological barriers (gills, intestine, roots, ...) towards metal fixation and absorption, closely related to the chemical form of the metal, the contamination sources (water, sediments or food) and the physico-chemical characteristics of the medium ;- at cell and molecular levels : biophysical study of Hg fixation on membrane reveals a new binding site on the phospholipids, the primary amine group on serine and ethanolamine polar heads, jointly with the SH groups of proteins ; Hg(II) induces a strong rigidification of the phospholipidic bilayers. Inorganic Hg and MeHg transports through model membranes (BLM) are essentially due to diffusion of neutral chloride species. These interactions between Hg compounds and membranes are strongly dependent on Hg chemical speciation (pH and pCl effects).

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - earth & environmental sciences
  • 3 - environmental sciences
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - psychologie. psychophysiologie
Catégories Scopus
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Pollution
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Water Science and Technology
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Ecological Modelling
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Environmental Chemistry
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Environmental Engineering
Catégories WoS
  • 1 - science ; 2 - water resources
  • 1 - science ; 2 - meteorology & atmospheric sciences
  • 1 - science ; 2 - environmental sciences
Identifiant ISTEX
9027C5E4286A0767030EE3B9B4DF7D74F244CB03
Revue

Water Air & Soil Pollution

Année de publication
1991
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
9.28
Sous-corpus
  • Poissons
Type de publication
Journal
ark:/67375/1BB-30K8JM11-3
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