Reference: Krasowska A, et al. (2003) Effect of antioxidants on Saccharomyces cerevisiae mutants deficient in superoxide dismutases. Folia Microbiol (Praha) 48(6):754-60

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Abstract


S. cerevisiae strain delta sodl lacking Cu,Zn-superoxide dismutase and delta sodl delta sod2 mutant lacking both Cu,Zn-SOD and Mn-superoxide dismutase displayed strongly reduced aerobic growth on glucose, glycerol and lactate; delta sod2 deletion had no effect on aerobic growth on glucose and largely precluded growth on glycerol and lactate. The oxygen-induced growth defects and their alleviation by antioxidants depended on growth conditions, in particular on oxygen supply to cells. Under strong aeration, vitamins A and E had a low effect, 100 mumol/L quercetin alleviated the growth defects of all three mutants while beta-carotene had no growth-restoring effect. The superoxide producer paraquat inhibited the aerobic growth of all three mutants in a concentration-dependent manner. Low concentrations of antioxidants had no effect on paraquat toxicity while higher concentrations supported the toxic effect of the agent.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't
Authors
Krasowska A, Dziadkowiec D, Lukaszewicz M, Wojtowicz K, Sigler K
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