alexa Physiology of biosurfactant synthesis by Rhodococcus species H13-A.
Environmental Sciences

Environmental Sciences

Journal of Bioremediation & Biodegradation

Author(s): Singer ME, Finnerty WR

Abstract Share this page

Abstract The physiology of biosurfactant synthesis by a soil isolate, identified as a Rhodococcus species, is described. The biosurfactant is a surface-active glycolipid produced during the stationary growth phase of Rhodococcus species H13-A on n-alkanes and fatty alcohols in response to limiting ammonium ion concentrations. Hexadecane-grown cells produced increasing amounts of extracellular glycolipid when the carbon to nitrogen ratio (C/N) was increased from 1.7 to 3.4. The increase in extracellular glycolipid in hexadecane-grown cells correlated with a decrease in the interfacial tension of the spent growth medium to values less than 5 mN/m. Significant levels of extracellular glycolipid were not detected in the spent growth medium of cells grown on triglycerides, fatty acids, ethanol, organic acids, or carbohydrates. Rhodococcus species H13-A contains the three indigenous plasmids pMVS100, pMVS200, and pMVS300, with neither pMVS200 nor pMVS300 being involved in glycolipid synthesis or hexadecane dissimilation. The role of pMVS100 remains undetermined. Key words: biosurfactants, glycolipids, trehalose lipids, Rhodococcus. This article was published in Can J Microbiol and referenced in Journal of Bioremediation & Biodegradation

Relevant Expert PPTs

Relevant Speaker PPTs

Recommended Conferences

Relevant Topics

Peer Reviewed Journals
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version