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Greff S., Zubia M., Payri Claude, Thomas O. P., Perez T. (2017). Chemogeography of the red macroalgae Asparagopsis : metabolomics, bioactivity, and relation to invasiveness. Metabolomics, 13 (4), art. 33 [13 p.]. ISSN 1573-3882

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Lien direct chez l'éditeur doi:10.1007/s11306-017-1169-z

Titre
Chemogeography of the red macroalgae Asparagopsis : metabolomics, bioactivity, and relation to invasiveness
Année de publication2017
Type de documentArticle référencé dans le Web of Science WOS:000394544900002
AuteursGreff S., Zubia M., Payri Claude, Thomas O. P., Perez T.
SourceMetabolomics, 2017, 13 (4), p. art. 33 [13 p.]. p. art. 33 [13 p.] ISSN 1573-3882
RésuméIntroduction 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.
Plan de classementSubstances naturelles [035] ; Limnologie biologique / Océanographie biologique [034]
Descr. géo.ACORES ; ALGERIE ; ESPAGNE ; FRANCE ; MEDITERRANEE ; GUADELOUPE ; MARTINIQUE ; MAYOTTE ; REUNION ; NOUVELLE CALEDONIE ; POLYNESIE FRANCAISE ; ATLANTIQUE ; PACIFIQUE, OCEAN INDIEN ; ZONE TROPICALE
LocalisationFonds IRD [F B010069430]
Identifiant IRDfdi:010069430
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010069430

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