The global Microcystis interactome
The global Microcystis interactome
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DOI：
10.1002/lno.11361
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发表时间：
2019-11-19
影响因子：
4.5
通讯作者：
Zhu, Guangwei
中科院分区：
文献类型：
--
作者：
Cook, Katherine, V;Li, Chuang;Zhu, Guangwei
细菌在水生系统的功能和多样性中发挥着关键作用，但除了对特定水华系统的研究外，人们对与有害蓝藻水华有关的细菌的多样性或生物地理学知之甚少。众所周知，氰基HAB物种可以塑造细菌群落组成，并依赖于相关细菌提供的功能，从而导致假设的氰基HAB相互作用体，这是一个协同和相互作用的细菌物种的共同进化群落，每个物种都是其他细菌物种成功所必需的。在这里，我们调查了横跨四大洲的12个湖泊中与铜绿微囊藻水华相关的微生物群，作为对假设的微囊藻相互作用组的初步测试。我们预测，全球各地的微生物组组成和功能潜力将是相似的。我们的结果，如16S rRNA序列相似性所揭示的那样，表明铜绿假单胞菌在280度经度和90度纬度的湖泊中是世界性的。微生物群落由一系列可操作的分类单位和相对丰度所代表。高度丰富的分类群在大多数地点更相关和共享，并且不随地理距离而变化，因此，与微囊藻一样，没有显示出扩散限制的证据。无论是在湖泊内部还是在湖泊之间，都具有高度的系统发育相关性，这表明具有相似功能潜力的微生物群与所有水华都有关。虽然微囊藻和微生物组细菌共享许多基因，但整个群落的元基因组分析揭示了一套可以被认为是互补的生化途径。我们的结果证明了全球微囊藻水华的高度相似性，从而为假想的微囊藻相互作用组提供了初步支持。
Bacteria play key roles in the function and diversity of aquatic systems, but aside from study of specific bloom systems, little is known about the diversity or biogeography of bacteria associated with harmful cyanobacterial blooms (cyanoHABs). CyanoHAB species are known to shape bacterial community composition and to rely on functions provided by the associated bacteria, leading to the hypothesized cyanoHAB interactome, a coevolved community of synergistic and interacting bacteria species, each necessary for the success of the others. Here, we surveyed the microbiome associated with Microcystis aeruginosa during blooms in 12 lakes spanning four continents as an initial test of the hypothesized Microcystis interactome. We predicted that microbiome composition and functional potential would be similar across blooms globally. Our results, as revealed by 16S rRNA sequence similarity, indicate that M. aeruginosa is cosmopolitan in lakes across a 280 degrees longitudinal and 90 degrees latitudinal gradient. The microbiome communities were represented by a wide range of operational taxonomic units and relative abundances. Highly abundant taxa were more related and shared across most sites and did not vary with geographic distance, thus, like Microcystis, revealing no evidence for dispersal limitation. High phylogenetic relatedness, both within and across lakes, indicates that microbiome bacteria with similar functional potential were associated with all blooms. While Microcystis and the microbiome bacteria shared many genes, whole-community metagenomic analysis revealed a suite of biochemical pathways that could be considered complementary. Our results demonstrate a high degree of similarity across global Microcystis blooms, thereby providing initial support for the hypothesized Microcystis interactome.