The conidia ofTyphula incarnata. 1. The ultrastructure of conidiogenesis

摘要

Monokaryotic strains ofTyphula incarnataLasch ex Fr. are able to produce small, unicellular, hyaline blastoconidia in basipetal sequence. The conidia are encapsulated by sticky mucilage and are derived from conidiogenous projections, each at the distal end of a conidiogenous cell. These structures elongate with formation of each new conidium. Tiny wall scars, visible in the transmission electron microscope, indicate an annellidic mode of conidiogenesis. However, the proliferation shows a weak sympodial tendency, owing to the partial plasticisation and integration of the preceding ring scars. This pattern was hitherto unknown for Basidiomycetes.