Some ultrastructural observations of Cladosporium caryigenum growth in pecan leaves

After the fungus Cladosporium caryigenum infected pecan leaves, hyphae grew subcuticularly over both upper and lower leaf epidermal cells. Hyphae also extended into the leaf interior through the middle lamella of adjacent epidermal cells. All hyphal growth was intercellular. Conidiophores arose from bulbous cells that developed on branches of the subcuticular hyphae. Cell walls of the bulbous cells became melanized before conidiophore development. Extension of C. caryigenum conidiophores occurred by elongation of the bulbous cell and rupture of host cuticle (...)