Climate Change Cluster, University of Technology Sydney, Sydney, Australia.
Environ Microbiol Rep. 2018 Feb;10(1):7-11. doi: 10.1111/1758-2229.12599. Epub 2017 Dec 1.
Dinoflagellates of the genus Symbiodinium underpin the survival and ecological success of corals. The use of cultured strains has been particularly important to disentangle the complex life history of Symbiodinium and their contribution to coral host physiology. However, these cultures typically harbour abundant bacterial communities which likely play important, but currently unknown, roles in Symbiodinium biology. We characterized the bacterial communities living in association with a wide phylogenetic diversity of Symbiodinium cultures (18 types spanning 5 clades) to define the core Symbiodinium microbiome. Similar to other systems, bacteria were nearly two orders of magnitude more numerically abundant than Symbiodinium cells and we identified three operational taxonomic units (OTUs) which were present in all cultures. These represented the α-proteobacterium Labrenzia and the γ-proteobacteria Marinobacter and Chromatiaceae. Based on the abundance and functional potential of bacteria harboured in these cultures, their contribution to Symbiodinium physiology can no longer be ignored.
虫黄藻属的共生体为珊瑚的生存和生态成功提供了基础。培养菌株的使用对于厘清共生体复杂的生活史及其对珊瑚宿主生理学的贡献尤为重要。然而，这些培养物通常含有丰富的细菌群落，这些群落可能在共生体生物学中发挥着重要但目前未知的作用。我们对与广泛的共生体培养物（跨越 5 个类群的 18 种类型）相关联的细菌群落进行了特征描述，以确定共生体微生物组的核心。与其他系统类似，细菌的数量级比共生体细胞高出近两个数量级，我们鉴定出了在所有培养物中都存在的三个操作分类单元（OTU）。这三个 OTU 分别代表 α-变形菌 Labrenzia、γ-变形菌 Marinobacter 和 Chromatiaceae。基于这些培养物中所携带的细菌的丰度和功能潜力，它们对共生体生理学的贡献已不容忽视。
