Summary
The origin of ascospore-delimitig membranes in Taphrina deformans has been studied in material fixed in KMnO4 and stained either in lead citrate or selectively with a phosphotungstic acid-chromic acid mixture (PTA-CA). Structural continuities exist between the ascus plasmalemma and the delimiting membranes. Both of these membrane systems stain preferentially with PTA-CA while other cell membranes do not stain. The spore-delimiting membranes are formed by invagination of the ascus plasmalemma at specific sites adjacent to nuclei. An ascus vesicle is not formed.
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Syrop, M.J., Beckett, A. The origin of ascospore-delimiting membranes in Taphrina deformans . Archiv. Mikrobiol. 86, 185–191 (1972). https://doi.org/10.1007/BF00425230
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DOI: https://doi.org/10.1007/BF00425230