Université de Lyon, F-69622, Lyon, France; Université Lyon 1, Villeurbanne, France; CNRS, UMR5557, Ecologie Microbienne, Villeurbanne, France.
Environ Microbiol. 2014 Sep;16(9):2804-14. doi: 10.1111/1462-2920.12442. Epub 2014 Apr 7.
Prokaryote-eukaryote interactions are primordial, but host selection of its bacterial community remains poorly understood. Because eukaryote evolution affects numerous traits shaping the ecology of their microbiome, we can expect that many evolutionary changes in the former will have the potential to impact on the composition of the latter. Consequently, the more phylogenetically distant the eukaryotic hosts, the more distinct their associated bacterial communities should be. We tested this with plants, by comparing the bacterial communities associated with maize genotypes or other Poaceae. 16S rRNA taxonomic microarray analysis showed that the genetic distance between rhizobacterial communities correlated significantly with the phylogenetic distance (derived from chloroplastic sequences) between Poaceae genotypes. This correlation was also significant when considering specific bacterial populations from all main bacterial divisions, instead of the whole rhizobacterial community. These results indicate that eukaryotic host's evolutionary history can be a significant factor shaping directly the assembly and composition of its associated bacterial compartment.
原核生物与真核生物的相互作用是原始的，但宿主对其细菌群落的选择仍知之甚少。由于真核生物的进化影响了许多塑造其微生物组生态的特征，我们可以预期前者的许多进化变化都有可能对后者的组成产生影响。因此，真核宿主之间的系统发育距离越远，它们相关的细菌群落就应该越独特。我们通过比较与玉米基因型或其他禾本科植物相关的细菌群落来验证这一点。16S rRNA 分类微阵列分析表明，根际细菌群落之间的遗传距离与禾本科基因型之间的系统发育距离（源自叶绿体序列）显著相关。当考虑来自所有主要细菌门的特定细菌种群，而不是整个根际细菌群落时，这种相关性仍然显著。这些结果表明，真核宿主的进化历史可以是一个重要的因素，直接塑造其相关细菌群落的组装和组成。
