A new type of conidial septal pore in fungi

Abstract

A new type of conidial septal pore is illustrated for the first time with transmission electron microscopy. Under the light microscope, conidia of all species of Canalisporium, and some species of Acrodictys and Cancellidium possess thick eusepta with dark brown, barrel-shaped thickenings embedded in the septa surrounding the septal pores. Similar pores are found in conidial distosepta in some species of Ellisembiai. These barrel-shaped thickenings superficially resemble the dolipore septa of basidiomycetes. The barrel-shaped thickenings of selected species have been examined at the transmission electron microscopic level and these thickenings are shown to be composed of electron-dense materials deposited within the septal wall layer. The centre of the thickenings are hollow forming septal pores.