Titre
Biochemical trade-offs: evidence for ecologically linked secondary metabolism of the sponge Oscarella balibaloi.
Type
article
Institution
Externe
Périodique
Auteur(s)
Ivanisevic, J.
Co-première auteure/Co-premier auteur
Thomas, O.P.
Auteure/Auteur
Pedel, L.
Auteure/Auteur
Pénez, N.
Auteure/Auteur
Ereskovsky, A.V.
Auteure/Auteur
Culioli, G.
Auteure/Auteur
Pérez, T.
Co-dernière auteure/Co-dernier auteur
Liens vers les personnes
ISSN
1932-6203
Statut éditorial
Publié
Date de publication
2011
Volume
6
Numéro
11
Première page
e28059
Peer-reviewed
Oui
Langue
anglais
Résumé
Secondary metabolite production is assumed to be costly and therefore the resource allocation to their production should be optimized with respect to primary biological functions such as growth or reproduction. Sponges are known to produce a great diversity of secondary metabolites with powerful biological activities that may explain their domination in some hard substrate communities both in terms of diversity and biomass. Oscarella balibaloi (Homoscleromorpha) is a recently described, highly dynamic species, which often overgrows other sessile marine invertebrates. Bioactivity measurements (standardized Microtox assay) and metabolic fingerprints were used as indicators of the baseline variations of the O. balibaloi secondary metabolism, and related to the sponge reproductive effort over two years. The bioactivity showed a significant seasonal variation with the lowest values at the end of spring and in early summer followed by the highest bioactivity in the late summer and autumn. An effect of the seawater temperature was detected, with a significantly higher bioactivity in warm conditions. There was also a tendency of a higher bioactivity when O. balibaloi was found overgrowing other sponge species. Metabolic fingerprints revealed the existence of three principal metabolic phenotypes: phenotype 1 exhibited by a majority of low bioactive, female individuals, whereas phenotypes 2 and 3 correspond to a majority of highly bioactive, non-reproductive individuals. The bioactivity was negatively correlated to the reproductive effort, minimal bioactivities coinciding with the period of embryogenesis and larval development. Our results fit the Optimal Defense Theory with an investment in the reproduction mainly shaping the secondary metabolism variability, and a less pronounced influence of other biotic (species interaction) and abiotic (temperature) factors.
PID Serval
serval:BIB_FB7B20FD489C
PMID
Open Access
Oui
Date de création
2016-06-06T20:11:36.185Z
Date de création dans IRIS
2025-05-21T05:52:06Z