Potential of tropical macroalgae from French Polynesia for biotechnological applications

Abstract

Extracts from 26 marine macroalgal species (11 Phaeophyceae, 7 Chlorophyta, and 8 Rhodophyta) sampled from the lagoons of Tahiti, Moorea, and Tubuai (French Polynesia) were tested for several biological activities. The red macroalga Amansia rhodantha exhibited the strongest antioxidant activities using four complementary methodologies (total phenolic content, 2,2-diphenyl-1-picrylhydrazyl, ferric reducing antioxidant power assay, and oxygen radical absorbance capacity assay). Therefore, the major metabolites of A. rhodantha were isolated and their structures identified. Some brown algae, especially species of the family Dictyotaceae like Padina boryana and Dictyota hamifera, showed cytotoxic activities against murine melanoma cells. Caulerpa chemnitzia extract demonstrated also a strong α-glucosidase inhibition (83.8% at 10 μg mL−1) and Asparagopsis taxiformis extract a high acetylcholinesterase inhibition (71.3% at 100 μg mL−1). Lastly, several Polynesian seaweeds demonstrated quorum-sensing inhibition for Vibrio harveyi. These results suggested that some seaweeds from French Polynesia have a great biotechnological potential for future applications in aquaculture, health, or cosmetic industries.

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Acknowledgments

The authors are grateful to Clara De Gaillande and Mathieu Grellier (University of French Polynesia) for technical assistance in the field. We thank IRD’s technician team (IRD center, French Polynesia) for taking us by boat to certain collection sites in Tahiti lagoon and their contribution to the production of organic extracts. We acknowledge Cécile Debitus for her help in the implementation of the QSi bioassays.

Funding

This research was financed by the University of French Polynesia (PROLIFALG project), the “Délégation à la Recherche” of the Government of French Polynesia (POLYALG project, convention no. 8769/MSR/REC), and the “Institut de Recherche pour le Développement” (IRD).

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Zubia, M., Thomas, O.P., Soulet, S. et al. Potential of tropical macroalgae from French Polynesia for biotechnological applications. J Appl Phycol 32, 2343–2362 (2020). https://doi.org/10.1007/s10811-019-01920-8

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Keywords

  • Seaweeds
  • Coral reefs
  • Screening
  • Bioactive compounds
  • Amansia rhodantha