Record Details

Arsenite tolerance and biotransformation potential in estuarine bacteria

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Arsenite tolerance and biotransformation potential in estuarine bacteria
 
Creator Nagvenkar, G.S.
Ramaiah, N.
 
Subject toxicity tolerance
pollution tolerance
Corynebaterium
biotransformation
 
Description Bacterial isolates from water and sediment samples from freshwater, estuarine and marine regions were tested for their growth in the presence of different concentrations of arsenic. Despite the generation times being longer in case of all bacterial isolates tested in nutrient broth with 200 ppm Arsenite (A sup(3+)), many of them were able to attain log phase and substantial growth variously between 36 and 96 h. The isolates tolerating is greater than or equal to 200 ppm arsenic (As) were found to belong to Enterobacteriaceae, Pseudomonas, Corynebaterium, Xanthomonas, Acinetobacter, Flavimonas and Micrococcus. Some of these environmental strains tolerant to 1,000 ppm arsenic were tested to realize their potential to detoxify arsenic. The rate of As biotransformation was faster by many of these strains. The percent of arsenite biotransformed/removed from the growth medium was the highest by a strain of Enterobacteriaceae (as much as 92% of the As in the growth medium by 120 h) followed by that of Corynebaterium and Acinetobacter strains. From these observations it is clear that many environmental strains are capable of quite rapid biotransformation of As. Contamination of drinking water by toxic metalloid arsenic affects thousands of people worldwide. Many environmental isolates of bacteria which detoxify this metalloid would serve beneficial in the depuration processes. It is suggested that only such strains capable of high tolerance to toxic arsenite, would biotransform As in polluted estuarine environments and would prove useful in As bioremediation applications
 
Date 2010-04-04T14:22:10Z
2010-04-04T14:22:10Z
2010
 
Type Journal Article
 
Identifier Ecotoxicology, vol.19(4); 604-613
no
http://drs.nio.org/drs/handle/2264/3580
 
Language en
 
Relation Ecotoxicology_19_604.jpg
 
Rights An edited version of this paper was published by Springer. Copyright [2010] Springer.
 
Publisher Springer