The functional role of photosynthesis-related genes in non-photosynthetic symbionts of corals

我们收集了珊瑚群体，并进行了DNA提取。为了鉴定与珊瑚相关的顶端复合体(珊瑚目的，也称为珊瑚)，使用18S rRNA区域的特异引物和Sanger测序进行了PCR扩增。初步结果表明，来自日本和印度-太平洋其他地区的大多数珊瑚与同一多面性珊瑚物种有关。此外，利用16S rRNA(细菌)、18S rRNA(真核生物)和ITS2 rRNA(共生科双鞭毛虫)的引物，采用文库制备和MiSeq测序的方法对珊瑚相关微生物的多样性进行了评价。我们根据已公布的管道，用生物信息学对数据进行分析。初步结果表明，珊瑚隶属于分支菌属、硬壳珊瑚属和共生藻属。此外，来自大西洋和印度洋-太平洋的珊瑚具有不同的共生菌科组成。在细菌方面，内生单胞菌是珊瑚中最常见的共生体。一些样品与弧菌有关，这是一种条件致病菌。迄今分析的印度-太平洋不同地区的样本具有不同的细菌成分。

We collected coral colonies and performed DNA extraction. In order to identify apicomplexans associated with corals (order Corallicolida, also called corallicolids), PCR amplification was conducted using specific primers for the 18S rRNA region and Sanger sequencing. Preliminary results indicated that most corals from Japan and other parts of the Indo-Pacific Ocean associated with the same generalist corallicolid species. Still, some corals samples were associated with a distinct corallicolid lineage.Additionally, library preparation and MiSeq sequecing was used to evaluate the diversity of microbes associated with corals, using 16S rRNA (bacteria), 18S rRNA (Eukaryotes), and ITS2 rRNA (diniflagellates of the family Symbiodiniaceae) primers. We analyzed the data with bioinformatics following published pipelines. Preliminary results showed that corals associated with Symbiodiniaceae of the genera Cladocopium, Durisdinium and Symbiodinium. Moreover, corals from the Atlantic and the Indo-Pacific oceans have a different Symbiodiniaceae composition. In relation to bacteria, the mutualistic genus Endozoicomonas was the most common symbiont of corals. Some samples were associated with Vibrio spp., which are opportunistic pathogens. Samples from different regions on the Indo-Pacific Ocean analyzed so far had a different bacterial composition.