Rhizosphere Microbiomes of European + Seagrasses Are Selected by the Plant, But Are Not Species Specific.
Rhizosphere Microbiomes of European + Seagrasses Are Selected by the Plant, But Are Not Species Specific.
复制标题
DOI：
10.3389/fmicb.2016.00440
复制
发表时间：
2016
影响因子：
5.2
通讯作者：
Muyzer G
中科院分区：
文献类型：
--
作者：
Cúcio C;Engelen AH;Costa R;Muyzer G
海草是生长在潮间带和潮下带浅层的软体沉积物中的海洋开花植物。它们通过稳定沉积物、为动物提供食物和庇护所以及回收养分，在沿海生态系统中发挥着重要作用。像其他植物一样，海草与有益微生物和有害微生物密切相关。虽然对陆生植物的微生物组了解很多，但对海草的微生物组知之甚少。在这里，我们提出了一个详细的研究结果的根际微生物组的海草物种横跨东北大西洋：大叶藻marina，大叶藻noltii，和Cymoplata nodosa。高分辨率的16S rRNA基因扩增测序结果表明，根瘤菌群显着不同的细菌群落周围的散装沉积物和海水。虽然我们没有发现在同一地区的不同海草物种的根瘤菌之间的显着差异，在不同的地理位置的海草有很大的不同。这些结果强烈表明，海草根瘤菌群是由植物代谢形成的，而不是与宿主共同进化的。海草的核心根瘤菌群主要包括参与硫循环的细菌，从而突出了海草生态系统中硫相关过程的重要性。
Seagrasses are marine flowering plants growing in soft-body sediments of intertidal and shallow sub-tidal zones. They play an important role in coastal ecosystems by stabilizing sediments, providing food and shelter for animals, and recycling nutrients. Like other plants, seagrasses live intimately with both beneficial and unfavorable microorganisms. Although much is known about the microbiomes of terrestrial plants, little is known about the microbiomes of seagrasses. Here we present the results of a detailed study on the rhizosphere microbiome of seagrass species across the North-eastern Atlantic Ocean: Zostera marina, Zostera noltii, and Cymodocea nodosa. High-resolution amplicon sequencing of 16S rRNA genes showed that the rhizobiomes were significantly different from the bacterial communities of surrounding bulk sediment and seawater. Although we found no significant differences between the rhizobiomes of different seagrass species within the same region, those of seagrasses in different geographical locations differed strongly. These results strongly suggest that the seagrass rhizobiomes are shaped by plant metabolism, but not coevolved with their host. The core rhizobiome of seagrasses includes mostly bacteria involved in the sulfur cycle, thereby highlighting the importance of sulfur-related processes in seagrass ecosystems.