Development and germination of chlamydospores in Pleiochaeta setosa

Abstract

Light and electron microscope observations of chlamydospore formation and germination in Pleiochaeta setosa (Kirchn.) Hughes and the processes involved in chlamydospore development are described, especially budding and anastomosis. Budding involves extension of the existing inner wall layer, whereas germination involves the formation of a new wall layer. Striated fibres, typically found during sporulation of P. setosa are also found in the cytoplasm of hyphae around developing chlamydospores. Similarities between chlamydospores of P. setosa and microsclerotia of other species are noted, and it is suggested that in the species studied, the resting structures be termed microsclerotia.