Role of Nitrogen Concentration on Production of Perithecia in Penicillium vermiculatum Dangeard

Abstract

SEXUAL reproduction is sometimes dependent on a number of environmental factors. While some fungi normally pass from the vegetative stage to the sexual reproduction stage regardless of their environment, there are others which will not undergo sexual reproduction unless provided with specific external factors, physical or chemical. Hawker¹ demonstrated that both thiamine and biotin are essential for sexual reproduction of Melanospora destruens. In the same species she also found a differential effect on sexual reproduction by a number of carbon sources. Other workers², experimenting with a number of fungal species, have found numerous other factors to be beneficial or indispensable for sexual reproduction.