screening of microorganisms for the production of novel antibiotics has been intensivelypursued for many years by scientists. actinomycetes have the capability to synthesize manydifferent antibiotics. a total of 69 actinomycete isolates were recovered from soil samplescollected from alborz province. selected colonies (rough, chalky) of actinomycetes werepurified. all screened isolates were iden...

The exact position of the actinomycetes or ray-fungi in the kingdom of lower forms of life has attracted considerable attention and has been a subject of much speculation. These organisms have been classified as bacteria, as fungi, and as a special group, either derived from one of the above or giving rise to both. With the accumulated knowledge concerning the morphology of the actinomycetes, i...

Endophytic actinomycetes were isolated from surface sterilized leaves of Catharanthes roseus (L.) G. Don offamily Apocynaceae. A total of 38 endophytic actinomycetes were recovered on Starch Casein Agar.Among the 38 isolates 20 morphologically different isolates were screened for antibacterial activity againstBacillus subtilis, Staphylococcus aureus, Pseudomonas aeruginosa, Pr...

Here, we report the draft genome sequences of three actinobacterial isolates, Micromonospora sp. RV43, Rubrobacter sp. RV113, and Nocardiopsis sp. RV163 that had previously been isolated from Mediterranean sponges. The draft genomes were analyzed for the presence of gene clusters indicative of secondary metabolism using antiSMASH 3.0 and NapDos pipelines. Our findings demonstrated the chemical ...

FRIEDHEIM, E., AND MICHAELIS, L. 1931 J. Biol. Chem., 91, 355-368. Cit. PORTER, J. R. 1946 Bacterial Chemistry and Physiology. John Wiley & Sons, Inc., New York, p. 426. GAUSE, G. F. 1946 Litmocidin, a new antibiotic substance produced by Proactinomyces cyaneus. J. Bacteriol., 51, 649-653. KRISS, A. E. 1936 Anthocyanin in actinomycetes. Compt. Rend. Acad. Sci. U.R.S.S., n.s., 4, 283-287. Chem. ...

Different species of Phytophthora cause serious and economically important soilborne diseases of citrus throughout the World. Tree and crop production losses occur from damping-off of seedlings in the seedbed, root and crown rot in nurseries, foot rot and fibrous root rot, and brown rot of fruit in groves. Foot rot results from infection of the bark near the ground level producing lesions on th...

It has been revealed that in organic horizons and plants of the tundra and taiga ecosystems under low temperatures, actinomycetal complexes form. The population density of psychrotolerant actinomycetes in organic horizons and plants reaches tens and hundreds of thousands CFU/g of substrate or soil, and decreases in the sequence litters > plants > soils > undecomposed plant remains > moss growth...

Mangroves are woody plants located in tropical and subtropical intertidal coastal regions. The mangrove ecosystem is becoming a hot spot for natural product discovery and bioactivity survey. Diverse mangrove actinomycetes as promising and productive sources are worth being explored and uncovered. At the time of writing, we report 73 novel compounds and 49 known compounds isolated from mangrove ...