The fine structure of Verticillium dahliae Kleb. colonizing cellophane

Hyphae of Verticillium dahliae Kleb. penetrated cellophane membranes supported on a sucrose-rich medium. Vesicular production be penetrating hyphae was thought to be concerned with cell wall synthesis and the production of extramycelial enzymes which facilitated colonization. After complete dissolution of the membrane hyphae underwent a process of degeneration.