The mode of emergence of the sporoplasm in Microsporidia and its relation to the structure of the spore

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Abstract
1. Studies on two Microsporidia, Nosema helminthorum Moniez and N. locustae Canning, have shown that the polar filament serves to conduct the sporoplasm out of the spore.2. The filament is a solid structure and the sporoplasm is either attached to or is a continuation of it. The filament is first extruded as a tightly coiled mass and, as this uncoils, it drags the sporoplasm out of the spore.3. The sporoplasm, which is either uninucleate or binucleate, takes the form of a girdle of protoplasm, which lies on the inner side of the spore membrane and surrounds the coiled polar filament. There is no polar capsule.

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