EFFECT OF PCO2 ON GROWTH, CONIDIATION, AND ENZYME-PRODUCTION IN SOLID-STATE CULTURE ON ASPERGILLUS-NIGER AND TRICHODERMA-VIRIDE TS

Three strains of fungi, Trichoderma viride TS, Aspergillus niger ATCC 22343, and Aspergillus niger S5 have been cultivated on solid media with different carbon dioxide partial pressures in the gaseous environment. Growth, conidiation, amylase, and cellulase production have been studied on synthetic agar media. The production of pectinases has been studied on sugar beet pulp. The results show an increase of the growth for the three strains with pCO2 at 10%. On the other hand, we observe a conidiation inhibition even at low pCO2. For enzyme production, the effect of pCO2 is more complex. It depends upon the fungus strain. Only the production of polygalacturonase by Aspergillus niger is notably enhanced with pCO2 at 10%. © 1990.