Multiple Vibrio fischeri genes are involved in biofilm formation and host colonization

Alba Chavez-Dozal, David Hogan, Clayton Gorman, Alvaro Quintanal-Villalonga, Michele K. Nishiguchi

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Biofilms are increasingly recognized as being the predominant form for survival for most bacteria in the environment. The successful colonization of Vibrio fischeri in its squid host Euprymna tasmanica involves complex microbe-host interactions mediated by specific genes that are essential for biofilm formation and colonization. Here, structural and regulatory genes were selected to study their role in biofilm formation and host colonization. We have mutated several genes (pilT, pilU, flgF, motY, ibpA and mifB) by an insertional inactivation strategy. The results demonstrate that structural genes responsible for synthesis of type IV pili and flagella are crucial for biofilm formation and host infection. Moreover, regulatory genes affect colony aggregation by various mechanisms, including alteration of synthesis of transcriptional factors and regulation of extracellular polysaccharide production. These results reflect the significance of how genetic alterations influence communal behavior, which is important in understanding symbiotic relationships.

Original languageEnglish (US)
Pages (from-to)562-573
Number of pages12
JournalFEMS Microbiology Ecology
Volume81
Issue number3
DOIs
StatePublished - Sep 2012
Externally publishedYes

Keywords

  • Beneficial
  • Biofilm
  • Mutualism
  • Sepiolid squid
  • Vibrio fischeri

ASJC Scopus subject areas

  • Microbiology
  • Ecology
  • Applied Microbiology and Biotechnology

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