Photosynthetic capacity of the endosymbiotic dinoflagellate Cladocopium sp. is preserved during digestion of its jellyfish host Mastigias papua by the anemone Entacmaea medusivora.

作者: Félix Vega de Luna , Kieu-Van Dang , Mila Cardol , Stéphane Roberty , Pierre Cardol

DOI: 10.1093/FEMSEC/FIZ141

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摘要: The sea anemone Entacmaea medusivora (Actiniaria, Anthozoa) commonly feeds on the golden jellyfish Mastigias papua (Rhizostomeae, Scyphozoa) which harbours an endosymbiotic dinoflagellate of genus Cladocopium (Symbiodiniaceae). In this study, we monitored photosynthetic activity microalgae while their host were ingested and digested by starved medusivorous anemones. By analyzing yield photosystem II, observed that cells remain photosynthetically competent during whole digestion process, thus confirming exceptional resistance Symbiodiniaceae to digestive enzymes. gastric cavity E. medusivora, release oxygen, could broadly stimulate microbiotic flora anemone. Ultimately, is not able retain more than few days physiologically-unaltered are therefore expelled in faecal pellets. potential contribution maintain a reservoir symbionts its role life cycle M. discussed.

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