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Mucus carbohydrate composition correlates with scleractinian coral phylogeny
Thobor, B.M.; Tilstra, A.; Mueller, B.; Haas, A.; Hehemann, J.-H.; Wild, C. (2024). Mucus carbohydrate composition correlates with scleractinian coral phylogeny. NPG Scientific Reports 14(1): 14019. https://dx.doi.org/10.1038/s41598-024-64828-5
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322, meer
Peer reviewed article  
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Author keywords
    Carbohydrates; Ecology; Molecular ecology
Auteurs  Top 
  • Thobor, B.M.
  • Tilstra, A.
  • Mueller, B.
  • Haas, A., meer
  • Hehemann, J.-H.
  • Wild, C.
Abstract
    The mucus surface layer serves vital functions for scleractinian corals and consists mainly of carbohydrates. Its carbohydrate composition has been suggested to be influenced by environmental conditions (e.g., temperature, nutrients) and microbial pressures (e.g., microbial degradation, microbial coral symbionts), yet to what extend the coral mucus composition is determined by phylogeny remains to be tested. To investigate the variation of mucus carbohydrate compositions among coral species, we analyzed the composition of mucosal carbohydrate building blocks (i.e., monosaccharides) for five species of scleractinian corals, supplemented with previously reported data, to discern overall patterns using cluster analysis. Monosaccharide composition from a total of 23 species (belonging to 14 genera and 11 families) revealed significant differences between two phylogenetic clades that diverged early in the evolutionary history of scleractinian corals (i.e., complex and robust; p = 0.001, R2 = 0.20), mainly driven by the absence of arabinose in the robust clade. Despite considerable differences in environmental conditions and sample analysis protocols applied, coral phylogeny significantly correlated with monosaccharide composition (Mantel test: p < 0.001, R2 = 0.70). These results suggest that coral mucus carbohydrates display phylogenetic dependence and support their essential role in the functioning of corals.
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