Asci of the Pezizales. VII. The apical apparatus of Galiella rufa and Sarcosoma globosum: reevaluation of the suboperculate ascus

Publisher Website
Google Scholar
Abstract
Light and electron microscopic examinations were made on asci of Galiella rufa and Sarcosoma globosum with emphasis on the development, cytochemistry, and morphology of the apical apparatus. Comparative analysis of the fresh and revived states of the apical apparatus in G. rufa demonstrated no apparent change in wall layering and only minor differences in staining reaction with silver methenamine. Ascal tips of both species were slightly thinner walled than the rest of the ascus and possessed bistratified outer layers. The external stratum of the outer layer was more pronounced and electron dense at the apex in S. globosum. Opercula were distinguished by a cytochemically localized zone of dehiscence in G. rufa and a differential staining of the internal stratum of the outer layer in S. globosum. The ascus tips of G. rufa and S. globosum were most similar to other members of the Sarcosomataceae. The apical apparatuses of the Sarcoscyphaceae differed substantially from those of the Sarcosomataceae and the rest of the Pezizales, constituting a separate type.

This publication has 0 references indexed in Scilit: