the effects of different storage temperatures and times on germination rate, malondialdehyde (mda), superoxide dismutase (sod), peroxidase (pod) and catalase (cat) activities in jatropha curcas l. seed were investigated. the results showed that germination rates of seeds stored at room temperature and 4°c for 1 month was significantly higher than those stored for 3 months at -20 and -80°c. mda ...

conclusions in conclusion, at measurement can be beneficial for the safety or recovery of malathion-induced toxic injury in liver tissue and liver mitochondria. results in liver tissue, the activity of lpo and cat was higher in the malathion group in comparison to controls. at reduced malathion-induced lpo, sod, cat, and gpx in rat liver. coadministration of at with malathion improved lpo, sod,...

in this study the effect of salt stress on banding patterns of superoxide dismutase (sod), catalase (cat) and peroxidase (pox) in 18 genotypes of white common bean (phaseolus vulgaris l.) were examined under two levels of nacl )0 and 400 mm) stress. for each isozymic band the “density × area” scores on gels were evaluated by mcid software and considered as enzymatic activity. three isozymes wer...

Bryophytes are poikilohydric organisms that can be used as model plants to study desiccation tolerance mechanisms. The main objective of this was examine the activities antioxidant enzymes ascorbate peroxidase (APX), catalase (CAT) and guaiacol (POD) in rehydrated desiccated states Syntrichia ruralis (Hedw.) Web. & Mohr. from two slopes, one North-east (NE) South-west (SW) facing collected ...

Catalases are ubiquitous hydrogen peroxide-detoxifying enzymes. They participate in fungal growth and development, such as mycelial growth and cellular differentiation, and in protecting fungi from oxidative damage under stressful conditions. To investigate the potential functions of catalases in Pleurotus ostreatus, we obtained two catalase genes from a draft genome sequence of P. ostreatus, a...

Hepatic catalase activity in unanesthetized man has been de termined by measuring the disappearance rate of hydrogen perox ide spectrophotometrically in homogenates from needle biopsy specimens of liver. Ten healthy male prisoners, 59 patients with advanced cancer, and 60 cadavers shortly after death with cancer were studied. There is a wide range of catalase activity in normal human liver. Cat...

During the growth of Staphylococcus aureus MF-31, initial catalase activity dropped to a reduced level at the onset of exponential phase before increasing. When S. aureus was grown at 25, 32, or 37 degrees C, catalase activity was found to decrease by 80 to 90% within 1 h of inoculation. Two catalase-negative mutants and wild-type S. aureus MF-31 cells were exposed to exogenous 20 mM H2O2 for 1...

The mutagenicity of hydrogen peroxide (H2O2) was compared with that of coffee, a complex mixture which generates H2O2. An Escherichia coli strain defective in catalase activity (katG katE double mutant) and carrying a single copy mucAB (pRW144) plasmid was constructed to enhance the mutagenic response to oxidants. The ability of the mucAB genes to influence the type, frequency and distribution ...

Recently it was reported that methanogens of the genus Methanobrevibacter exhibit catalase activity. This was surprising, since Methanobrevibacter species belong to the order Methanobacteriales, which are known not to contain cytochromes and to lack the ability to synthesize heme. We report here that Methanobrevibacter arboriphilus strains AZ and DH1 contained catalase activity only when the gr...

In a variety of disorders, endothelial cells are exposed to high levels of oxidants, generated within the cells and/or consequent to local inflammation. In the context of the sensitivity of endothelial cells to oxidant stress, particularly related to H2O2, we have designed a replication deficient recombinant adenovirus containing the human catalase cDNA (AdCL) to transfer the catalase cDNA to t...