Ultrastructure of the ascospores of the new yeast genus Sporopachydermia Rodrigues de Miranda

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Abstract
Development of the ascospores of Sporopachydermia lactativora and S. cereana was studied in ultrathin sections. The spores have a very thick wall consisting of a thin dark outer layer and a double light inner layer the outer part of which is very wide and often irregular. During germination, this part disappears, the outer dark layer breaks up and the inner part of the light layer remains around the protoplast during development to a vegetative cell.