PRELIMINARY SURVEY OF TOXICITY OF THE GREEN-ALGA CAULERPA-TAXIFOLIA INTRODUCED INTO THE MEDITERRANEAN
| Autor: | Alexandre Meinesz, Francesco Pietra, Danielle Pesando, Rodolphe Lemée, A. Dubreuil, Antonio Guerriero, M. Durand-Clément |
|---|---|
| Přispěvatelé: | Laboratoire d'océanographie de Villefranche (LOV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 1993 |
| Předmět: |
0106 biological sciences
0303 health sciences biology 010604 marine biology & hydrobiology Ulvophyceae Metabolite Microorganism Caulerpa taxifolia Plant Science Aquatic Science biology.organism_classification 01 natural sciences 03 medical and health sciences chemistry.chemical_compound Mediterranean sea Algae chemistry biology.animal Toxicity Botany 14. Life underwater Sea urchin [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography 030304 developmental biology |
| Zdroj: | Journal of Applied Phycology Journal of Applied Phycology, 1993, 5 (5), pp.485-493. ⟨10.1007/BF02182507⟩ |
| DOI: | 10.1007/BF02182507⟩ |
| Popis: | Caulerpa taxifolia (Vahl) C. Agardh (Ulvophyceae, Caulerpales) is an alga of tropical origin that was accidentally introduced into the Mediterranean sea in 1984, where this species can reach an abundance that has never been described in tropical endemic regions. It is known that caulerpacean algae can develop an efficient strategy against grazers consisting of the synthesis of repulsive of toxic secondary metabolites: we report here the first study of the toxicity of purified secondary metabolites and raw extracts from C. taxifolia from the Mediterranean. Toxicity was evaluated on three models: mice (lethality), mammalian cells in culture (cytotoxicity) and sea urchin eggs (disturbance of cell proliferation). Aqueous extracts are only active on fibroblasts and mice. In the three toxicity models a seasonal variation of toxicity is observed for the crude methanol extract as well as a decrease of this activity when C. taxifolia from the Mediterranean is kept in aquaria. Pure compounds exhibit different toxicity depending on the assay. 10,11-epoxycaulerpenyne is the most active substance on mice and fibroblasts whereas taxifolial A and D are inactive or only weakly toxic. Among the four tested compounds caulerpenyne, the major metabolite of C. taxifolia, is the most active on sea urchin eggs. Caulerpenyne may therefore represent an ecological risk for microorganisms and the eggs of multicellular animals living close to this alga. The ecological impact of this toxicity on marine organisms and the interaction of this alga with the herbivorous fauna are discussed |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|