Temperature effects on growth, sporulation, and germination of some “aquatic” hyphomycetes

Twelve species of "aquatic" hyphomycetes isolated from terrestrial habitats were grown in agar cultures at 5, 10, 15, 20, and 25C. The optimum temperature for mycelial growth of most species was 20C. Sporulation generally was favored by temperatures lower than or equal to that for maximum mycelial growth. Conidium germination by nine species was 100% after 24 h on water agar at 10-25C. Conidia of species with a low optimum temperature for sporulation were more seasonal in occurrence than were species that sporulated well from 10 to 25C.