Enhancing coral photosynthesis: The power of manganese-alginate gels
| Type | : | ACL |
|---|---|---|
| Nature | : | Production scientifique |
| Au bénéfice du Laboratoire | : | Oui |
| Statut de publication | : | Publié |
| Année de publication | : | 2025 |
| Auteurs (11) | : | MOREIRA G,r,m DE LIMA J,m jr NOMURA C,s DE JESUS J,h,f UHER Emmanuelle DUFOUR Aurélie DO NOSCIMIENTO M,i,m GROVER R MIGON Christophe FERRIER-PAGÈS Christine ESPÓSITO B,p |
| Revue scientifique | : | Journal of Trace Elements in Medicine and Biology |
| Volume | : | 89 |
| Fascicule | : | |
| Pages | : | |
| DOI | : | 10.1016/j.jtemb.2025.127675 |
| URL | : | https://doi.org/10.1016/j.jtemb.2025.127675 |
| Abstract | : | Introduction: Scleractinian corals rely on symbiosis with Symbiodiniaceae, a family of marine dinoflagellates, for photosynthetic products, which sustains their growth in nutrient-poor environments. Manganese (Mn) is a critical element for photosynthesis as an essential cofactor for the oxygen-evolving complex of the photosynthetic machinery. Also, Mn is an essential metal involved in antioxidant mechanisms that maintain normal cellular function in heat stressed corals. Objectives: This study aims to investigate the effects of different Mn species on photosynthetic efficiency in the coral Stylophora pistillata under thermal stress. A Mn-alginate device for controlled Mn supplementation was developed for this purpose. Methods: Coral nubbins were exposed to the following Mn species: manganese(II) chloride (MnCl2), manganese(II) ethylenediamine-N,N '-disuccinate (MnEDDS), manganese(II) desferrioxamine (MnDFO), and manganese(III) citrate (MnCIT). Photosynthetic parameters were measured using fluorometry. Mn-alginate gel dishes were prepared for controlled release, and their impacts on coral health indicators were evaluated at 26 degrees C and 31 degrees C, including photosynthetic efficiency, oxygen production, and symbiont density. Results: Free Mn(II) (MnCl2) and MnEDDS significantly enhanced photosynthetic efficiency. Mn-alginate effectively delivered Mn in controlled bursts. Under thermal stress, Mn supplementation improved photosynthetic activity and favored symbiont density. Mn-alginate dishes were stable in seawater and biocompatible, releasing Mn optimally at elevated temperatures. Conclusion: Mn-alginate gel dishes are an efficient and safe method for improving coral photosynthesis and mitigating thermal stress impacts, supporting reef conservation efforts in a changing climate. |
| Mots-clés | : | - |
| Commentaire | : | - |
| Tags | : | - |
| Fichier attaché | : | - |
| Citation | : |
Moreira GRM, De Lima JM, Nomura CS, De Jesus JHF, Uher E, Dufour A, Do Noscimiento MIM, Grover R, Migon C, Ferrier-Pagès C, Espósito BP (2025) Enhancing coral photosynthesis: The power of manganese-alginate gels. J Trace Elem Med Biol 89 | doi: 10.1016/j.jtemb.2025.127675
|