Effect of oxygen and carbon dioxide on growth of four aero-aquatic hyphomycetes

Abstract

Mycelia of four aero-aquatic hyphomycetes were grown in a beech leaf decoction under six gas regimes. It was found that growth under 760 or 380 mm O 2 in no case exceeded growth under 160 mm O 2 (air). Growth under 10 mm O 2 or pure N 2 was less for all fungi than growth under air, and growth under a mixture containing 70 mm CO 2 and 160 mm O 2 in no case exceeded growth under air and in two cases growth was depressed. The results are discussed in relation to the static and often stagnant habitats where members of this group are abundant.