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<datestamp>2018-01-12</datestamp>
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<title lang=en>Chemogeography of the red macroalgae Asparagopsis: metabolomics, bioactivity, and relation to invasiveness</title>
<creator>Greff, Stephane</creator>
<creator>Zubia, Mayalen</creator>
<creator>Payri, Claude</creator>
<creator>Thomas, Olivier P.</creator>
<creator>Perez, Thierry</creator>
<contributor>Station marine d’Endoume ; Aix Marseille Université (AMU)</contributor>
<contributor>Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Institut de Recherche pour le Développement (IRD [France-Ouest])</contributor>
<contributor>Université d'Avignon et des Pays de Vaucluse (UAPV)</contributor>
<contributor>Aix Marseille Université (AMU)</contributor>
<contributor>Agence pour la Recherche et la Valorisation Marines - ARVAM (Ste Clotilde, La réunion-France) ; Agence pour la Recherche et la Valorisation Marines - ARVAM (Ste Clotilde, La réunion-France)</contributor>
<contributor>Ecologie marine tropicale dans les Océans Pacifique et Indien (ENTROPIE [Réunion]) ; Institut de Recherche pour le Développement (IRD) - Université de la Réunion (UR) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Laboratoire d'Excellence CORAIL (LabEX CORAIL) ; Institut de Recherche pour le Développement (IRD) - Université des Antilles et de la Guyane (UAG) - École des hautes études en sciences sociales (EHESS) - École pratique des hautes études (EPHE) - Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) - Université de la Réunion (UR) - Université de la Polynésie Française (UPF) - Université de Nouvelle Calédonie - Institut d'écologie et environnement</contributor>
<contributor>Natl Univ Ireland Galway, Sch Chem, Marine Biodiscovery, Galway, Ireland ; National University of Ireland [Galway] (NUI Galway)</contributor>
<description>International audience</description>
<source>ISSN: 1573-3882</source>
<source>EISSN: 1573-3890</source>
<source>Metabolomics</source>
<publisher>Springer Verlag</publisher>
<identifier>hal-01681538</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01681538</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01681538</source>
<source>Metabolomics, Springer Verlag, 2017, 13 (4), 〈10.1007/s11306-017-1169-z〉</source>
<identifier>DOI : 10.1007/s11306-017-1169-z</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1007/s11306-017-1169-z</relation>
<language>en</language>
<subject>[SDE] Environmental Sciences</subject>
<subject>[SDU.STU] Sciences of the Universe [physics]/Earth Sciences</subject>
<subject>[SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces, environment</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Introduction The Latitudinal Gradient Hypothesis (LGH) foresees that specialized metabolites are overexpressed under low latitudes, where organisms are subjected to higher herbivory pressure. The widespread macroalga Asparagopsis taxiformis is composed of six distinct genetic lineages, some of them being introduced in many regions. Objectives To study (i) metabolic fingerprints of the macroalga and (ii) its bioactivity in space and time, both as proxies of its investment in defensive traits, in order to assess links between bioactivities and metabotypes with macroalgal invasiveness. Methods 289 macroalgal individuals, from four tropical and three temperate regions, were analyzed using untargeted metabolomics and the standardized Microtox (R) assay. Results Metabotypes showed a low divergence between tropical and temperate populations, while bioactivities were higher in temperate populations. However, these phenotypes varied significantly in time, with a higher variability in tropical regions. Bioactivities were high and stable in temperate regions, whereas they were low and much variable in tropical regions. Although the introduced lineage two exhibited the highest bioactivities, this lineage could also present variable proliferation fates. Conclusion The metabolomic approach partly discriminates macroalgal populations from various geographic origins. The production of chemical defenses assessed by the bioactivity assay does not match the macroalgal genetic lineage and seems more driven by the environment. The higher content of chemical defenses in temperate versus tropical populations is not in accordance with the LGH and cannot be related to the invasiveness of the macroalgae.</description>
<date>2017</date>
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