Temperature shift-induced changes in the antioxidant enzyme system of Cyanobacterium synechocystis PCC 6803

Amal A. Rady, Mostafa M. El-Sheekh, B. Matkovics

Research output: Article

15 Citations (Scopus)

Abstract

1. 1. Effect of controlled up- and down-shifts of growth temperature on the antioxidant enzymes activities and lipid peroxidation were investigated in intact cells of Cyanobacterium synechocystis PCC 6803 acclimated at different growth temperature. 2. 2. Algal cells grown at 36°C were treated at 20 and 43°C as down- and upward-shifts of growth temperature for 24 hr, respectively. At the down-shift of growth temperature the superoxide dismutase, catalase and glutathione peroxidase were significantly increased with concomitant decrease in protein content. 3. 3. These parameters showed similar temperature dependencies in the up-shift of growth temperature, they were decreased significantly. 4. 4. The increased hydroxyl (HO) radical and malonyldialdehyde (MDA) formation, when algal cells exposed to down-shift of growth temperature, supposedly due to stimulated production of superoxide radicals (O2 -) and hydrogen peroxide (H2O2) at lower temperature.

Original languageEnglish
Pages (from-to)433-435
Number of pages3
JournalInternational Journal of Biochemistry
Volume26
Issue number3
DOIs
Publication statusPublished - 1994

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Synechocystis
Cyanobacteria
Growth temperature
Antioxidants
Temperature
Enzymes
Growth
Enzyme activity
Glutathione Peroxidase
Malondialdehyde
Superoxides
Hydroxyl Radical
Catalase
Hydrogen Peroxide
Superoxide Dismutase
Cells
Lipid Peroxidation
Lipids
Proteins

ASJC Scopus subject areas

  • Biochemistry

Cite this

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title = "Temperature shift-induced changes in the antioxidant enzyme system of Cyanobacterium synechocystis PCC 6803",
abstract = "1. 1. Effect of controlled up- and down-shifts of growth temperature on the antioxidant enzymes activities and lipid peroxidation were investigated in intact cells of Cyanobacterium synechocystis PCC 6803 acclimated at different growth temperature. 2. 2. Algal cells grown at 36°C were treated at 20 and 43°C as down- and upward-shifts of growth temperature for 24 hr, respectively. At the down-shift of growth temperature the superoxide dismutase, catalase and glutathione peroxidase were significantly increased with concomitant decrease in protein content. 3. 3. These parameters showed similar temperature dependencies in the up-shift of growth temperature, they were decreased significantly. 4. 4. The increased hydroxyl (HO) radical and malonyldialdehyde (MDA) formation, when algal cells exposed to down-shift of growth temperature, supposedly due to stimulated production of superoxide radicals (O2 -) and hydrogen peroxide (H2O2) at lower temperature.",
author = "Rady, {Amal A.} and El-Sheekh, {Mostafa M.} and B. Matkovics",
year = "1994",
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T1 - Temperature shift-induced changes in the antioxidant enzyme system of Cyanobacterium synechocystis PCC 6803

AU - Rady, Amal A.

AU - El-Sheekh, Mostafa M.

AU - Matkovics, B.

PY - 1994

Y1 - 1994

N2 - 1. 1. Effect of controlled up- and down-shifts of growth temperature on the antioxidant enzymes activities and lipid peroxidation were investigated in intact cells of Cyanobacterium synechocystis PCC 6803 acclimated at different growth temperature. 2. 2. Algal cells grown at 36°C were treated at 20 and 43°C as down- and upward-shifts of growth temperature for 24 hr, respectively. At the down-shift of growth temperature the superoxide dismutase, catalase and glutathione peroxidase were significantly increased with concomitant decrease in protein content. 3. 3. These parameters showed similar temperature dependencies in the up-shift of growth temperature, they were decreased significantly. 4. 4. The increased hydroxyl (HO) radical and malonyldialdehyde (MDA) formation, when algal cells exposed to down-shift of growth temperature, supposedly due to stimulated production of superoxide radicals (O2 -) and hydrogen peroxide (H2O2) at lower temperature.

AB - 1. 1. Effect of controlled up- and down-shifts of growth temperature on the antioxidant enzymes activities and lipid peroxidation were investigated in intact cells of Cyanobacterium synechocystis PCC 6803 acclimated at different growth temperature. 2. 2. Algal cells grown at 36°C were treated at 20 and 43°C as down- and upward-shifts of growth temperature for 24 hr, respectively. At the down-shift of growth temperature the superoxide dismutase, catalase and glutathione peroxidase were significantly increased with concomitant decrease in protein content. 3. 3. These parameters showed similar temperature dependencies in the up-shift of growth temperature, they were decreased significantly. 4. 4. The increased hydroxyl (HO) radical and malonyldialdehyde (MDA) formation, when algal cells exposed to down-shift of growth temperature, supposedly due to stimulated production of superoxide radicals (O2 -) and hydrogen peroxide (H2O2) at lower temperature.

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