Bipolaris oryzae causes rice brown spot disease which reduces rice yield with substantial global impact. Streptomycetes isolated from rice fields of Guilan Province, Iran, showed antifungal activity against the tested pathogen. From five active Streptomyces spp. isolates, isolate G showed high antagonistic activity. To determine its taxonomical identity, its colonies character...

n the present work, isolation and identification of some plant beneficial bacteria vermicompost were conducted. A total ten bacterial isolates selected characterized morphologically biochemically. Molecular characterization using 16S rRNA gene sequence analysis phylogenic tree According to percentages homology with closest NCBI strain, all belonged six species (

objective(s): in recent years, the biosynthesis of gold nanoparticles has been the focus of interest because of their emerging application in a number of areas such as biomedicine. in the present study we report the extracellular biosynthesis of gold nanoparticles (aunps) by using a positive bacterium named streptomyces fulvissimus isolate u from rice fields of guilan province, iran.materials a...

7 Doi Y, Arakawa Y. 16S ribosomal RNA methylation: emerging resistance mechanism against aminoglycosides. Clin Infect Dis 2007; 45: 88–94. 8 Bogaerts P, Galimand M, Bauraing C et al. Emergence of ArmA and RmtB aminoglycoside resistance 16S rRNA methylases in Belgium. J Antimicrob Chemother 2007; 59: 459–64. 9 Wachino J, Shibayama K, Kurokawa H et al. Novel plasmid-mediated 16S rRNA m1A1408 meth...

AIMS To characterise a strain of Gram negative aerobic straight or slightly curved rods (HKU3) isolated from the blood culture of a 9 year old Chinese boy with neutropenic fever and pseudobacteraemia. METHODS The isolate was phenotypically investigated by standard biochemical methods using conventional biochemical tests, scanning electron microscopy, and transmission electron microscopy. Geno...

actinomycetes are an uncommon agent of human infections and its pathogenic factors are not known. the present study reports a rare case isolation of an actinomycete from a woman pleural fluid; the strain was identified by 16s rrna gene sequence analysis. this strain was tested to produce an extracellular protease that hydrolysis gelatin, casein and hemoglobin on agar mediums. the purification o...

Deep-sea mussels of the genus Bathymodiolus (Bivalvia: Mytilidae) harbor symbiotic bacteria in their gills and are among the dominant invertebrate species at cold seeps and hydrothermal vents. An undescribed Bathymodiolus species was collected at a depth of 3,150 m in a newly discovered cold seep area on the southeast Atlantic margin, close to the Zaire channel. Transmission electron microscopy...

Abstract Monochloramine is used to regulate microbial regrowth in drinking water distribution systems (DWDS) but produces carcinogenic disinfection byproducts and constitutes a source of energy for nitrifying bacteria. This study followed biofilm-dispersed communities full-scale DWDS distributing ultrafiltered over three years, before after removal monochloramine. Communities were described usi...

Three new cyanobacterial strains, that have been previously purified from the hydroid Dynamena pumila (L., 1758), isolated from the White Sea, were studied using scanning and transmission electron microscopy methods and were characterized by using almost complete sequence of the 16S rRNA gene, internal transcribed spacer 16S-23S rRNA, and part of the gene for 23S rRNA. The full nucleotide seque...

The composition of predominant soil bacteria during grassland succession was investigated in the Dutch Drentse A area. Five meadows, taken out of agricultural production at different time points, and one currently fertilized plot represented different stages of grassland succession. Since fertilization and agricultural production were stopped, the six plots showed a constant decline in the leve...