1Baikalian Research
Center, 664003 Irkutsk, Karl Marks st., 5-10, Russia; 2Irkutsk State
University, 664003 Irkutsk, Karl Marks st., 1, Russia; 3Siberian Institute
of
Plant Physiology and Biochemistry, SD RAS, Irkutsk, Russia
Received 17 January 2006 г.
Abstract - The aim of the present
study was a study of the influence
different stressful factor on syntheses and activity of the stress
proteins (HSP70, sHSP and peroxidase) of freshwater organism. Six
freshwater amphipod species were investigated: Eulimnogammarus
cyaneus (Dyb.), E. verrucosus (Gerstf.), E. vittatus (Dyb.) - endemic
species from Lake Baikal which were compared with Palearctic species - Gammarus lacustris Sars., G. tigrinus (Sexton),
(Stebbins). It was shown expression of sHSP by heat and toxic stresses
for all amphipods species. Oxidative stress induced HSP70 for
Palearctic species Chaetogammarus
ischnusG. tigrinus
and C.
ischnus
but not for baikalian species. Heat stress did not caused the increase
of HSP70 level for Baikalian species of amphipods. The activity of the
peroxidase was decrease by heat and toxic stresses. Oxidative stress
caused the increase of peroxidase activity for Palearctic species, and
the decrease for Baikalian once.
