Four mutants of Proactinomyces (Nocardia) mediterranei, an organism producing rifamycin B were subjected to electron microscopic investigation. The mutants differed in the biosynthetic activity. The investigation showed correlation between the length of the hyphal fragments of the over-substrate mycelium and the level of the organism activity. The study of the fine structure of the mycelium revealed changes in the structure of the cell wall, character of the nuclear material and hyphae vacuolization.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
The ultrastructural organization of the red-orange cultures of Nocardia (Proactinomyces) asteroides was compared with that of a Nocardia-like variant of Actinomyces (Streptomyces) chrysomallus isolated upon the inoculation of the submerged parent culture. The comparison has demonstrated for the first time that the major difference consists in the structure of their cross partitions. In Nocardia, the septa is split at all stages of its formation; in the Nocardia-like variant, the partitions have the same structure as the cultures of the genus Actinomyces (Streptomyces).
View Article and Find Full Text PDFFour mutants of Proactinomyces (Nocardia) mediterranei, an organism producing rifamycin B were subjected to electron microscopic investigation. The mutants differed in the biosynthetic activity. The investigation showed correlation between the length of the hyphal fragments of the over-substrate mycelium and the level of the organism activity.
View Article and Find Full Text PDFA hydrogen-oxidizing actinomycete (Z-1046) was isolated from a flood-plain marsh in the Moscow Region. Its taxonomy was compared with that of similar cultures belonging to international special standards of actinomycetes (ISP). The strain Z-1046 was found to be identical with Streptomyces autotrophicus ISP-5011 (RIA-1008, ATCC-19727, CBS-466.
View Article and Find Full Text PDFA numerical taxonomic classification study was carried out on 177 strains representing the "rhodochrous" complex and the genera Gordona, Mycobacterium and Nocardia. The strains were examined for 92 unit characters and the data were analysed by computer. Three clusters were defined at the 75 to 80% similarity level.
View Article and Find Full Text PDFThe micromorphology, growth cycle, chemical composition of the cell walls, and the susceptibility to lysozyme and specific phages were studied with the culture of Actinomyces orientalis RIA-1074. It is seggested on the basis of these studied to transfer the culture from the Actinomyces genus to the Proactinomyces genus and to rename it Proactinomyces orientalis (Pittinger et Brigham) comb. nov.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!