School of BioSciences, The University of Melbourne, Parkville, Victoria, Australia.
Melbourne Bioinformatics, The University of Melbourne, Parkville, Victoria, Australia.
mSystems. 2023 Dec 21;8(6):e0086023. doi: 10.1128/msystems.00860-23. Epub 2023 Nov 1.
Symbiotic microorganisms are crucial for the survival of corals and their resistance to coral bleaching in the face of climate change. However, the impact of microbe-microbe interactions on coral functioning is mostly unknown but could be essential factors for coral adaption to future climates. Here, we investigated interactions between cultured dinoflagellates of the Symbiodiniaceae family, essential photosymbionts of corals, and associated bacteria. By assessing the genomic potential of 49 bacteria, we found that they are likely beneficial for Symbiodiniaceae, through the production of B vitamins and antioxidants. Additionally, bacterial genes involved in host-symbiont interactions, such as secretion systems, accumulated mutations following long-term exposure to heat, suggesting symbiotic interactions may change under climate change. This highlights the importance of microbe-microbe interactions in coral functioning.
共生微生物对珊瑚的生存至关重要，它们能帮助珊瑚抵抗气候变化导致的珊瑚白化。然而，微生物之间的相互作用对珊瑚功能的影响在很大程度上尚不清楚，但这可能是珊瑚适应未来气候的关键因素。在这里，我们研究了珊瑚的关键共生光合作用微生物——共生甲藻科中的培养虫黄藻与相关细菌之间的相互作用。通过评估 49 种细菌的基因组潜力，我们发现它们可能通过产生 B 族维生素和抗氧化剂而对共生甲藻科有益。此外，与宿主-共生体相互作用相关的细菌基因，如分泌系统，在长期暴露于热环境下会积累突变，这表明在气候变化下共生相互作用可能会发生变化。这凸显了微生物之间相互作用在珊瑚功能中的重要性。
