An aerobic heterotrophic bacterial strain was isolated. BLAST
and similarity analysis of the near full length 16S rRNA gene sequences
(1,465 bp) of the As(III)-oxidizing bacterium showed that it
belonged to Pseudomonas (99% similarity, GeneBank accession
number: KJ452337). The bacterial strain was named as Pseudomonas
sp. HN-1. The strain cannot grew in media designed for
chemolithotrophic metabolism using As(III) as the sole electron
donor and it requires an organic carbon source (e.g., sodium lactate)
for growth. With the result that As(III) oxidation corresponded with
microbial growth (data not shown), it is suggested that the mechanism
of As(III) oxidation by the isolate was related to As detoxification
rather than energy generation (Oremland and Stolz, 2005).