Studies on (Myxobacterales) Free

Abstract

SUMMARY

We have isolated the fruiting myxobacterium from wood and bark, and have examined some aspects of its ecology, morphology, physiology and taxonomy. Vegetative cells were Gram-negative, spindle-shaped rods 5·2 to 8·4 long and 0·65 to 0·74 wide. The myxospores were optically refractile short rods measuring about 3·2 × 1·0 . Fruiting bodies were usually bright orange or red brown and consisted of a stalk 60 to 140 high bearing 1 to 20 cysts at its top. Most cysts were spherical or ovoid, measuring 40 to 60 by 25 to 45 . was cultivated in liquid culture in a dispersed vegetative state or on solid media, producing either fruiting bodies or vegetative forms. Optimal vegetative growth was obtained with a medium containing Casitone, glucose and salts. The optimal temperature for growth was 30°. Cultures could be preserved by storage of vegetative forms at – 60° or of dried myxospores or fruiting bodies at – 18°. Dried myxospores were resistant to desiccation and elevated temperatures. We propose that , which had been incorporated into the genus , be re-established as a separate genus within the Polyangiaceae. We further propose the inclusion of among the Sorangiaceae.

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1969-09-01
2024-03-28
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