The Effects of Humidity, Temperature and Carbon Dioxide on Sporulation of Choanephora cucurbitarum

Abstract

Cultures of C. cucurbitarum were grown for two days under continuous bright light to allow vegetative growth but to prevent sporulation, then placed under experimental conditions. The principal results were: (1) An accumulation of CO2 in closed culture vessels greatly reduced or prevented sporulation; (2) The relative abundance of conidial heads and sporangia was governed largely by the relative humidity and its effect was magnified at temp. above 25[degree]C. High humidity favored the production of sporangia, while low humidity favored formation of conidial heads.