Journal of Chemical Ecology

, Volume 28, Issue 10, pp 2057–2081

Oligoalginate Recognition and Oxidative Burst Play a Key Role in Natural and Induced Resistance of Sporophytes of Laminariales

  • Frithjof C. Küpper
  • Dieter G. Müller
  • Akira F. Peters
  • Bernard Kloareg
  • Philippe Potin
Article

Abstract

Forty-five species of brown algae (Phaeophyceae) were surveyed for their capacity to respond by an oxidative burst to challenges with alginate oligosaccharides. Intertidal frondose brown algae (Fucales) constitutively released high quantities of peroxide. The capacity to recognize oligoguluronates and to react with an oxidative burst was confined to alginate-rich taxa with complex thallus morphology, epitomized by the sporophytes of Laminariales. When kelp sporophytes were impaired in their capacity to perform an oxidative burst by the NAD(P)Hoxidase inhibitor diphenylene iodonium, they were readily degraded by their bacterial epiflora. Thus, in these algae, the oxidative response is an essential element of natural resistance. We also report on the establishment of a well-defined experimental system for investigations on kelp immunity, with Laminaria digitata as the host and its phaeophycean endophyte, Laminariocolax tomentosoides, as the pathogen. We found that an alginate-triggered oxidative burst significantly induces resistance in Laminaria digitata against infection. From these findings we infer that oligoalginate signals are important cues in the interaction between laminarialean kelps and potential pathogens.

Marine algae kelps Laminaria Laminariocolax Macrocystis oligoalginates oxidative burst natural resistance induced resistance 

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Copyright information

© Plenum Publishing Corporation 2002

Authors and Affiliations

  • Frithjof C. Küpper
    • 1
    • 2
  • Dieter G. Müller
    • 2
  • Akira F. Peters
    • 1
    • 3
  • Bernard Kloareg
    • 1
  • Philippe Potin
    • 1
  1. 1.Station Biologique, UMR 1931CNRS-Laboratoires GoëmarRoscoff, BrittanyFrance
  2. 2.Department of BiologyUniversity of KonstanzKonstanzGermany
  3. 3.Institute for Marine ResearchKielGermany

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