Two ultrastructural aspects of the trichospore of Pennella angustispora (Harpellales): canals in the sporangiospore cell wall and appendage formation

Abstract

Ultrastructure of the trichospore (monosporous sporangium) and its generative cell of Pennella angustispora was observed by electron microscopy. In the sporangiospore, both poles of the cell wall were thickened in appearance with canals. Appendages developed longitudinally along the wall of generative cell before the formation of a septum that would delimit between the trichospore and its generative cell.