Effect of glucose, CSL, GL levels
In examining effect of cultivation medium composition on
the bioconversion process, different levels of either
glucose, CSL or GL were used (Figures. 1, 2 and 3,
respectively). The low level of glucose (0.5 %) supported
maximum GL bioconversion activity (44.45 %), while
increase of glucose level over the latter concentration
resulted in a gradual decrease in GL bioconversion
efficiency. The enhanced bioconversion efficiency in the
presence of glucose might be due to increased growth of
the fungus on this carbon source. However, increasing
glucose concentration to 2% was accompanied by sharp
decrease in the bioconversion efficiency, possibly
because the cells preferred the easily oxidizable d-( + )-
glucose as exclusive carbon source and repressed
induction of GL hydrolyzing activity (Manosroi et al. 2003).