Abstract

SUMMARYThe application of Heidenhain's Hematoxylin and KOH-Phloxine staining technics for the cytological study of Syzygospora alba suggests the following conclusions: 1. Syzygospora-type “basidia” and the homobasidiomycete-basidia are borne on the same hypha; thus Syzygospora is only a conidial stage of a homobasidiomycete.2. The nuclear behavior in the development of the Peniophora-type basidium could not be precisely followed. The mature basidium usually produces four, occasionally two or three, sterigmata which are tipped by basidiospores. Basidiospores germinate by forming mycelium or by producing blastospore-like conidia.3. The nuclear behavior in the development of the Syzygospora-type spores has been observed. The terminal hyphal cell becomes transversely septate. Each daughter cell produces a short stalk on which a spore is borne. Two spores, one from each cell, fuse to form a binucleate dumbbell-shaped spore which becomes detached after it reached maturity. Spores germinate by producing mycelium.

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