Biosurfactant production by Serratia marcescens SS-1 and its isogenic strain SMΔR defective in SpnR, a quorum-sensing LuxR family protein

Yu Hong Wei, Hsin Chih Lai, Shan Yu Chen, Mao Song Yeh, Jo Shu Chang

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

Serratia marcescens SS-1 and its SpnR-defective isogenic mutant, SMΔR, produced an extracellular surfactant able to decrease surface tension of water from 72 to 37 dyne cm-1 (SMΔR strain) and to 45 dyne cm-1 (SS-1 strain). The biosurfactant also emulsified kerosene and diesel with a maximum emulsion index of 77% (diesel and kerosene) for the SMΔR strain, and 72% (kerosene) and 40% (diesel) for the SS-1 strain. Deletion of spnR gene appeared to enhance biosurfactant production. Model simulations suggest that biosurfactant production by the two strains was growth-associated. The SMAR strain had a yield coefficient of 22-32% g dry cell-1, which is 32-50% higher than that of the SS-1 strain.

Original languageEnglish
Pages (from-to)799-802
Number of pages4
JournalBiotechnology Letters
Volume26
Issue number10
DOIs
Publication statusPublished - 2004 May 1

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology

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