Aquat. Living Resour.
Volume 27, Number 2, April-June 2014
|Page(s)||83 - 89|
|Published online||16 December 2014|
Seasonal antibacterial activity of two red seaweeds, Palmaria palmata and Grateloupia turuturu, on European abalone pathogen Vibrio harveyi
1 Université de Nantes, Institut
Universitaire Mer et Littoral, EA
2160 Mer Molécules Santé, 2 rue de la Houssinière, BP 92208, 44322
Nantes Cedex 3,
2 Departamento de Ecología e Hidrología, Facultad de Biología, Universidad de Murcia, 30100 Murcia, Spain
3 Laboratoire des sciences de l’environnement marin (LEMAR), Institut universitaire européen de la mer (IUEM), place Copernic Technopôle Brest-Iroise, 29280 Plouzané, France
4 Service RMN-RPE, UFR Sciences et Techniques, avenue Le Gorgeu, 29200 Brest Cedex, France
a Corresponding author:
Accepted: 1 December 2014
Vibrio harveyi is the main pathogen of the European abalone Haliotis tuberculata, and recently caused important mortalities at the production sites of this marine gastropod in France. In the present work, the monthly antibacterial activity of two red seaweed species from the French Atlantic coast, the native Palmaria palmata and the introduced Grateloupia turuturu, were investigated against the abalone pathogen Vibrio harveyi strain ORM4. Water-soluble extracts were screened using the microplate method. Grateloupia turuturu showed an antibacterial activity with a maximal growth inhibition in spring of around 16%. In contrast, Palmaria palmata was inactive, as further growth of the bacteria was observed. Preliminary one-dimensional proton nuclear magnetic-resonance (1H NMR) profiles identified the differences between the two water-soluble extracts.
Key words: Antibacterial activity / Growth inhibition / Immunity / Water-soluble extracts / Vibrio harveyi / Haliotis tuberculata
© EDP Sciences, IFREMER, IRD 2014
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