Abstract
In this study some physiological and biochemical modifications induced by sublethal hydrostatic pressures, ranging between 200 and 800 bar, in four Yarrowia lipolytica strains were investigated. In particular, the changes in the proteolytic and lipolytic activities, as well as the hydrophobicity and cellular fatty acid composition of four strains, were analysed in order to carry out a preliminary investigation on response or adaptation mechanisms. This paper shows the involvement of the membrane systems and of fatty acid desaturase enzymes in the active response to sublethal doses, in addition to the enhancement of extracellular proteases.
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