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Updated: Aug 12, 2026

Sexual Development and Ascospore Discharge in Fusarium graminearum
Published on: March 29, 2012
Chemical composition of the spore sheath of Streptomyces griseus
Abstract:
The fibrillar sheath surrounding spores of Streptomyces griseus was separated from spores and partially purified by differential centrifugation. The reaction of isolated sheath material to various solvents and enzymes was monitored by electron microscopy. Fibrilar elements (rodlets) were apparently resistant to most solvents and enzymes used; only acetone induced any change in their appearance. Analysis of sheath material showed that its composition differed considerably from that of spore walls, having a low content of nitrogen (1.7% w/w), amino sugars (0.067% w/w) and carbohydrate (0.036% w/w). It was suggested that the sheath may be at least partially inorganic in nature.
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