Journal article
Temperature induced bacterial virulence and bleaching disease in a chemically defended marine macroalga
Environmental microbiology, Vol.13(2), pp.529-537
2011
Abstract
Host-pathogen interactions have been widely studied in humans and terrestrial plants, but are much less well explored in marine systems. Here we show that a marine macroalga, Delisea pulchra, utilizes a chemical defence - furanones - to inhibit colonization and infection by a novel bacterial pathogen, Ruegeria sp. R11, and that infection by R11 is temperature dependent. Ruegeria sp. R11 formed biofilms, invaded and bleached furanone-free, but not furanone-producing D. pulchra thalli, at high (24°C) but not low (19°C) temperatures. Bleaching is commonly observed in natural populations of D. pulchra near Sydney, Australia, during the austral summer when ocean temperatures are at their peak and the chemical defences of the alga are reduced. Furanones, produced by D. pulchra as a chemical defence, inhibit quorum sensing (QS) in bacteria, and this may play a role in furanone inhibition of R11 infection of furanone-free thalli as R11 produces QS signals. This interplay between temperature, an algal chemical defence mechanism and bacterial virulence demonstrates the complex impact environmental change can have on an ecosystem. © 2010 Society for Applied Microbiology and Blackwell Publishing Ltd.
Details
- Title
- Temperature induced bacterial virulence and bleaching disease in a chemically defended marine macroalga
- Authors
- R J Case (Author) - University of New South WalesS R Longford (Author) - University of New South WalesAlexandra H Campbell (Author) - University of New South WalesA Low (Author) - University of New South WalesN Tujula (Author) - University of New South WalesP D Steinberg (Author) - University of New South WalesS Kjelleberg (Author) - University of New South Wales
- Publication details
- Environmental microbiology, Vol.13(2), pp.529-537
- Publisher
- Wiley-Blackwell Publishing Ltd.
- Date published
- 2011
- DOI
- 10.1111/j.1462-2920.2010.02356.x
- ISSN
- 1462-2912; 1462-2912
- Organisation Unit
- School of Health - Biomedicine; University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy; School of Health and Behavioural Sciences - Legacy
- Language
- English
- Record Identifier
- 99451412802621
- Output Type
- Journal article
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