| heavy metal resistance and genotypic analysis of metal resistance genes in gram-positive and gram-negative bacteria present in ni-rich serpentine soil and in the rhizosphere of alyssum murale. | forty-six bacterial cultures, including one culture collection strain, thirty from the rhizosphere of alyssum murale and fifteen from ni-rich soil, were tested for their ability to tolerate arsenate, cadmium, chromium, zinc, mercury, lead, cobalt, copper, and nickel in their growth medium. the resistance patterns, expressed as minimum inhibitory concentrations, for all cultures to the nine different metal ions were surveyed by using the agar dilution method. a large number of the cultures were r ... | 2007 | 17276484 |
| hexavalent chromium reduction by free and immobilized cell-free extract of arthrobacter rhombi-re. | in the present study, hexavalent chromium (cr(vi)) reduction potential of chromium reductase associated with the cell-free extracts (cfe) of arthrobacter rhombi-re species was evaluated. arthrobacter rhombi-re, an efficient cr(vi) reducing bacterium, was enriched and isolated from a chromium-contaminated site. chromium reductase activity of arthrobacter rhombi-re strain was associated with the cell-free extract and the contribution of extracellular enzymes to cr(vi) reduction was negligible. nad ... | 2010 | 19165627 |
| arthrobacter halodurans sp. nov., a new halotolerant bacterium isolated from sea water. | a novel gram-positive, halotolerant, non-sporulating, non-motile, catalase-positive, oxidase-negative and aerobic bacterium, designated strain jsm 078085(t), was isolated from sea water collected from the south china sea. strain jsm 078085(t) exhibited a rod-coccus growth cycle and produced a yellow pigment. the strain was able to grow in the presence of 0-12% (w/v) nacl and at ph 6.0-9.5 and 4-35 degrees c; optimum growth was observed at ph 7.0 and 25-30 degrees c in the absence of nacl. the pe ... | 2009 | 19337850 |
| arthrobacter rhombi sp. nov., isolated from greenland halibut (reinhardtius hippoglossoides). | two strains of a hitherto undescribed gram-positive coryneform bacterium isolated from greenland halibut (reinhardtius hippoglossoides) were characterized by phenotypic and molecular taxonomic methods. comparative 16s rrna gene sequencing studies demonstrated that the unknown strains constitute a new line within the genus arthrobacter. the nearest relatives of the bacterium from fish were members of the arthrobacter nicotianael arthrobacter sulfureus group. the unknown bacterium was readily dist ... | 1999 | 10425782 |
| construction of escherichia coli-arthrobacter-rhodococcus shuttle vectors based on a cryptic plasmid from arthrobacter rhombi and investigation of their application for functional screening. | a cryptic plasmid from arthrobacter rhombi prh1, designated as pprh, was sequenced and characterized. it was 5000 bp in length with a g+c content of 66 mol%. the plasmid pprh was predicted to encode six putative open reading frames (orfs), in which orf2 and orf3 formed the minimal replicon of plasmid pprh and shared 55-61% and 60-69% homology, respectively, with the repa and repb proteins of reported rhodococcal plasmids. sequence analysis revealed a typical cole2-type ori located 45 bp upstream ... | 2011 | 22098420 |