Ultrastructure of Dormant and Germinating Conidia of Aspergillus Nidulans

Abstract
The cell wall of dry, dormant conidia of Aspergillus nidulans is three-layered. The wall of hydrated conidia is five-layered and the germ tube wall is continuous with the innermost layer. The outermost layer consists of rodlets measuring 10 nm in diameter. Mitochondria and endoplasmic reticulum increase in number and amount, respectively, during hydration and germination and vacuoles increase in size. The apex of the young germ tube is multivesicular.