Mechanisms of antioxidant system activation in freshwater amphipoda: II. Baikal littoral Eulimnogammarus cyaneus (Dyb.)

The goal of the work is to understand the mechanisms of activation of the antioxidant system under the oxidative action of endogenous character in the Baikal endemic species Eulimnogammarus cyaneus (Dyb.). The oxidative action was induced by exposing the amphipoda in the solutions of a laboratory hu...

Full description

Saved in:
Bibliographic Details
Published in:Contemporary problems of ecology 2008-10, Vol.1 (5), p.522-527
Main Author: Timofeev, M. A.
Format: Article
Language:English
Subjects:
Acclimatization
Amphipoda
Antioxidants
Biomedical and Life Sciences
Crustaceans
Ecology
Endemic species
Enzymatic activity
Enzymes
Eulimnogammarus cyaneus
Freshwater ecology
Hydrogen peroxide
Life Sciences
Oxidizing agents
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The goal of the work is to understand the mechanisms of activation of the antioxidant system under the oxidative action of endogenous character in the Baikal endemic species Eulimnogammarus cyaneus (Dyb.). The oxidative action was induced by exposing the amphipoda in the solutions of a laboratory humin-containing preparation. Experiments showed that two different mechanisms can trigger the antioxidant system in the Baikal amphipoda of E. cyaneus . Depending on the conditions and duration of preliminary acclimatization, a change of the activation mechanism of antioxidant protection or its separate elements is observed. For the organisms with the duration of preliminary acclimatization within three days, we observed the involvement of a specific mechanism allowing efficient elimination of the formed AFK in the case of low concentrations of humin-containing preparation. This mechanism is characterized by the inhibition of enzymatic activity of peroxidase and glutathione-S-transferase, as well as by a decrease in the level of hydrogen peroxide. In the Baikal amphipoda kept for a long time in an artificial environment, the oxidant activates the mechanism of protection similar to that observed previously for the Palearctic species. This mechanism is characterized by an increase of the enzymatic activity of peroxidase, a decrease of the activity of catalase, and the absence of inhibition of glutathione-S-transferase.
ISSN:1995-4255
1995-4263
DOI:10.1134/S1995425508050020