PRODUCTION OF VOLATILE COMPOUNDS BY THE EDIBLE FUNGUS RHIZOPUS-ORYZAEDURING SOLID-STATE CULTIVATION ON TROPICAL AGROINDUSTRIAL SUBSTRATES

When Rhizopus oryzae was grown on medium containing cassava bagasse pl us soybean meal (5:5 w/w), CO2 production was at its highest (200 ml.l (-1)) while highest volatile metabolite production was with amaranth g rain as substrate (282.8 ml.l(-1)). In the headspace, ethanol was the most abundant compound (more than 80%). Acetaldehyde, 1-propanol, ethy l propionate and 3-methyl butanol were also present. CO2 and volatile metabolite productions reached their maxima around 20 h and 36 h, resp ectively.