Isolation of tellurite- and selenite-resistant bacteria from hydrothermal vents of the Juan de Fuca Ridge in the Pacific Ocean.

Abstract:

:Deep-ocean hydrothermal-vent environments are rich in heavy metals and metalloids and present excellent sites for the isolation of metal-resistant microorganisms. Both metalloid-oxide-resistant and metalloid-oxide-reducing bacteria were found. Tellurite- and selenite-reducing strains were isolated in high numbers from ocean water near hydrothermal vents, bacterial films, and sulfide-rich rocks. Growth of these isolates in media containing K(2)TeO(3) or Na(2)SeO(3) resulted in the accumulation of metallic tellurium or selenium. The MIC of K(2)TeO(3) ranged from 1,500 to greater than 2,500 micro g/ml, and the MIC of Na(2)SeO(3) ranged from 6,000 to greater than 7,000 micro g/ml for 10 strains. Phylogenetic analysis of 4 of these 10 strains revealed that they form a branch closely related to members of the genus Pseudoalteromonas, within the gamma-3 subclass of the Proteobacteria. All 10 strains were found to be salt tolerant, pH tolerant, and thermotolerant. The metalloid resistance and morphological, physiological, and phylogenetic characteristics of newly isolated strains are described.

journal_name

Appl Environ Microbiol

authors

Rathgeber C,Yurkova N,Stackebrandt E,Beatty JT,Yurkov V

doi

10.1128/aem.68.9.4613-4622.2002

keywords:

subject

Has Abstract

pub_date

2002-09-01 00:00:00

pages

4613-22

issue

9

eissn

0099-2240

issn

1098-5336

journal_volume

68

pub_type

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