Correction to: Intracellular bacteria are common and taxonomically diverse in cultured and in hospite algal endosymbionts of coral reefs |
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| Authors: | Justin Maire Sam K Girvan Sophie E Barkla Alexis Perez-Gonzalez David J Suggett Linda L Blackall Madeleine J H van Oppen |
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| Institution: | 1.School of Biosciences, The University of Melbourne, Melbourne, VIC Australia ;2.Melbourne Cytometry Platform, Melbourne Dental School, The University of Melbourne, Melbourne, VIC Australia ;3.Climate Change Cluster, Faculty of Science, University of Technology Sydney, Sydney, NSW Australia ;4.Australian Institute of Marine Science, Townsville, QLD Australia |
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| Abstract: | Corals house a variety of microorganisms which they depend on for their survival, including endosymbiotic dinoflagellates (Symbiodiniaceae) and bacteria. While cnidarian–microorganism interactions are widely studied, Symbiodiniaceae–bacteria interactions are only just beginning to receive attention. Here, we describe the localization and composition of the bacterial communities associated with cultures of 11 Symbiodiniaceae strains from nine species and six genera. Three-dimensional confocal laser scanning and electron microscopy revealed bacteria are present inside the Symbiodiniaceae cells as well as closely associated with their external cell surface. Bacterial pure cultures and 16S rRNA gene metabarcoding from Symbiodiniaceae cultures highlighted distinct and highly diverse bacterial communities occur intracellularly, closely associated with the Symbiodiniaceae outer cell surface and loosely associated (i.e., in the surrounding culture media). The intracellular bacteria are highly conserved across Symbiodiniaceae species, suggesting they may be involved in Symbiodiniaceae physiology. Our findings provide unique new insights into the biology of Symbiodiniaceae.Subject terms: Symbiosis, Microbiome, Marine microbiology |
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