Record Details

'Trade-off' in Antarctic bacteria: limnetic psychrotrophs concede multiple enzyme expressions for multiple metal resistance

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title 'Trade-off' in Antarctic bacteria: limnetic psychrotrophs concede multiple enzyme expressions for multiple metal resistance
 
Creator DeSouza, M.J.B.D.
LokaBharathi, P.A.
Nair, S.
Chandramohan, D.
 
Subject microorganisms
enzymes
enzymatic activity
metals
biological resistence
resistence mechanism
mercury
Bacteria
 
Description The present study examines the metal and antibiotic resistant bacteria in ice and water from lakes east and west of the Indian base camp (Maitri) in Antarctica. The isolates from western and eastern lakes showed distinct geographical differences in properties like metal resistance and enzyme expression. This may be attributed to high organic loading in the lakes on the west of Maitri. However, there was no marked geographical distinction in antibiotic resistance between the lakes. Bacteria from the lakes on the eastern side showed resistance to three or more metals including mercury while, those from the western were resistant to only 1-2 metals excluding mercury. Multiple enzyme expression was more pronounced in the lakes on the western side. On the eastern side multiple metal resistance was encountered in bacterial isolates associated with fewer enzyme expressions suggesting a 'tradeoff'. Thus these Antarctic isolates from the east trade their ability to express multiple enzymes for developing resistance to multiple metals including mercury.
 
Date 2008-01-30T13:25:07Z
2008-01-30T13:25:07Z
2007
 
Type Journal Article
 
Identifier Biometals, Vol.20; 821-828p.
http://drs.nio.org/drs/handle/2264/676
 
Language en
 
Publisher Springer