Abstract
In order to utilize Saccharomyces cerevisiae strain SCAK-1 collected from deep ocean water (the isolate) in various industrial fields, responses of a function of metabolism to various kinds of stress were investigated. In this study, the decreased weight of culture medium by the activation of glycolytic system in yeast was considered to be a metabolic ability. Four kinds of stress treatment such as temperature, osmosis, alcohol and oxidation were selected. The metabolic ability of the isolate was never decreased by treatments of a high-temperature stress, oxidative stress and high concentration of alcohol stress, although that of the type strain was significantly decreased by these treatments. Furthermore, the metabolic ability of each strain was never influenced by osmotic stress. Finally, maltose utilization ability of the isolate which was considered to be lost in the DOW environment was recovered by the release of glucose repression. The isolate is expected to be used in various industrial fields in the future because it was confirmed that the isolate has resistance to various kinds of stress and was also recovered an important ability of yeast such as the maltose utilization in this study.
