Evaluation of some morphological characteristics of spores of two species of microsporida by scanning electron microscope and freeze-etching techniques
✍ Scribed by T. P. Liu; H. J. Liu
- Publisher
- John Wiley and Sons
- Year
- 1974
- Tongue
- English
- Weight
- 891 KB
- Volume
- 143
- Category
- Article
- ISSN
- 0362-2525
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✦ Synopsis
Abstract
Scanning electron microscopy revealed spores of Nosema apis and Thelohania fibrata to be egg‐shaped, but only the mature spore of T. fibrata was shown to possess a horseshoe‐like concavity at the posterior pole. Freezeetched preparations indicated that this concavity was due to a thin area of the spore coat. Freeze‐etching studies also show spores of N. apis do possess an umbrella‐shaped polaroplast, and a polar filament which is arranged in a double layer with over 30 coils. The spore of T. fibrata contains a pear‐shaped arrangement of the polaroplast membrane, and a polar filament arranged in a single layer of 22 coils.