Record Details

Surfactin restores and enhances swarming motility under heavy metal stress.

DIR@IMTECH: CSIR-Institute of Microbial Technology

View Archive Info
 
 
Field Value
 
Title Surfactin restores and enhances swarming motility under heavy metal stress.
 
Creator Singh, Anil Kumar
Dhanjal, Soniya
Cameotra, Swaranjit Singh
 
Description The present work reports the importance of lipopeptide biosurfactant on swarming motility of multi-metal resistant (MMR) bacterium under heavy metal stress. The MMR bacteria strain CM100B, identified as Bacillus cereus, was isolated from the coal mine sample. The strain was able to grow and reduce several metals namely Cd(2+), Co(2+), Cu(2+), Ni(2+), Mn(2+) and Pb(2+) ions which are common environmental pollutants. Presence of toxic heavy metal ions in the swarming medium significantly altered the motility of CM100B. Presence of Cd(2+) and Pb(2+) ions inhibited development of peritrichous flagella, thus inhibiting swarming motility. However, the addition of anionic biosurfactant surfactin restored (in case of Cd(2+) and Pb(2+) ions) or enhanced (in case of Co(2+), Cu(2+), Ni(2+) and Mn(2+)) the swarming ability of CM100B. Zeta potential studies for determining bacterial cell surface charge indicated that surfactin provided a suitable swarming environment to bacteria even under metal stress by chelating to cationic metal ions. Non-ionic surfactant Triton X-100 was unable to restore swarming under Cd(2+) and Pb(2+) ion stress. Thus, suggesting that surfactin can aid in motility not only by reducing the surface tension of swarming medium but also by binding to metal ions in the presence of metal ions stress.
 
Publisher Amsterdam ; New York : Elsevier, c1993-
 
Date 2014-04-01
 
Type Article
PeerReviewed
 
Relation http://www.sciencedirect.com/science/article/pii/S0927776513007881
http://crdd.osdd.net/open/1552/
 
Identifier Singh, Anil Kumar and Dhanjal, Soniya and Cameotra, Swaranjit Singh (2014) Surfactin restores and enhances swarming motility under heavy metal stress. Colloids and surfaces. B, Biointerfaces, 116. pp. 26-31. ISSN 1873-4367