biological control of sugar beet damping-off of rhizoctonia solani ag-4 by two native streptomyces isolates (s2 and c) was evaluated in green house and field conditions. in dual culture, two streptomyces isolates inhibited mycelial growth of r. solani ag-4. besides, volatile components of s2 and c inhibited r. solani mycelial growth for 72 and 74 percentages, respectively. soil treatment either...

Streptomyces are Gram-positive, filamentous bacteria which have a complex life cycle that includes formation of substrate and aerial mycelia and spores. Streptomyces produce approximately 70% of all naturally occurring antibiotics, 2) and it is in the commercial production of antibiotics that this genus has been exploited. While the genetics and molecular biology of many Streptomyces are poorly...

Enterocin is a new antibiotic isolated from cultures of two strains of Streptomyces, which were given the names Streptomyces candidus var. enterostaticus WS-8096 and variant M-127 of Streptomyces viridochromogenes. Its elementary analysis and mass spectroscopic measurement suggest the molecular formula is C22H20010. The ultraviolet absorption gave two maximal peaks at 250 nm and 283 nm in metha...

Streptomyces is a group of soil bacteria of medicinal, economic, ecological, and industrial importance. It is renowned for its complex biology in gene regulation, antibiotic production, morphological differentiation, and stress response. In this review, we provide an overview of the recent advances in Streptomyces biology inspired by -omics based high throughput technologies. In this post-genom...

Using Streptomyces coelicolor microarrays to discover regulators of gene expression in other Streptomyces species, we identified wblA, a whiB-like gene encoding a putative transcription factor, as a down-regulator of doxorubicin biosynthesis in Streptomyces peucetius. Further analysis revealed that wblA functions pleiotropically to control antibiotic production and morphological differentiation...

Streptomyces linear chromosomes frequently cause deletions at both ends spontaneously or by various mutagenic treatments, and concomitantly display dynamic structural changes such as circularization and arm replacement. We have cloned and sequenced the fusion junctions of circularized chromosomes in two deletion mutants of Streptomyces griseus. No homology and a 1-bp overlap were found between ...

Streptomyces coelicolor is a model system for the study of Streptomyces, a genus of bacteria responsible for the production of many clinically important antibiotics. Here we report the genome sequence of ΦCAM, a new S. coelicolor generalized transducing bacteriophage, isolated from a soil sample originating from Lincolnshire, United Kingdom. Many open reading frames within ΦCAM shared high leve...

Recently Sumiki and his co-workers (1955) isolated a new antibiotic, named homomycin, from the culture filtrate of a streptomyces obtained from the soil of Inada-Noborito, Kanagawa Prefecture, Japan. This strain of streptomyces was considered as a new species according to their taxonomic study, and designated as Streptomyces noboritoensis. The method of preparation of purified material of homom...

Conditions for efficient transformation of Amycolatopsis orientalis (Nocardia orientalis) protoplasts by Streptomyces plasmid cloning vectors were identified. Three streptomycete plasmid origins of replication function in A. orientalis, as do the apramycin resistance gene from Escherichia coli, the thiostrepton resistance gene from Streptomyces azureus, and the tyrosinase gene from Streptomyces...