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Original Article

A scanning electron microscope comparison of basidial structures in Filobasidiella neoformans and Filobasidiella bacillispora

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Pages 85-89 | Published online: 09 Jul 2009
 

Abstract

A comparison of basidial structures in the two species of Filobasidiella by scanning electron microscopy showed similar morphology for the basidia. Globose swellings developed into oval to clavate mature basidia which produced chains of basidiospores by budding at four points on the apical surface, with sterigmata lacking. F. bacillispora sometimes developed a typical basal swelling during enlargement of the clavate basidium. The basidiospores of F. neoformans were larger, with irregularly roughened walls and lemon-shaped to oval in contrast to the smooth, rod-shaped basidiospores of F. bacillispora.

Zusammenfassung

Ein Vergleich im Scanning-Elektronenmikroskop ergab für die sexuellen Fruchtkörper der beiden Species von Filobasidiella eine ähnliche Morphologie.

Rundliche Schwellungen entwickelten sich zu ovalen bis keulenförmigen Basidien, aus denen die Ketten der Basidiosporen durch Sprossung an 4 Stellen der apikalen Oberfläche hervorgingen, ohne Ausbildung von Sterigmata. Bei F. bacillispora liess das keulenformige Basidium im Stadium seines Wachstums oft eine typische basale Schwellung erkennen. Die Basidiosporen von F. neoformans zeigten eine unregelmässig aufgerankte Wand und waren mehr zitronenförmig und grösser verglichen mit den glattwandigen, stäbchenförmigen Basidiosporen von F. bacillispora.

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