Pan Shenyang, Zhang Wenlong, Li Yi, Zhou Pengcheng, Zhang Huanjun, Niu Lihua, Wang Longfei
Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China.
Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China.
J Environ Manage. 2022 Jun 15;312:114952. doi: 10.1016/j.jenvman.2022.114952. Epub 2022 Mar 24.
Maintaining hydrophyte growth has been a major focus of aquatic ecological research. The hydrophyte microbiome plays a key role in the growth and health of hydrophytes, but the ecological processes regulating the assembly and function of hydrophyte microbial communities remain unclear. This knowledge gap limits the efficacy of managing microbiomes to enhance the capacity of hydrophytes to restore the aquatic environment. Here, we sampled three typical hydrophytes (Ceratophyllum demersum, Nymphoides peltatum, and Potamogeton crispus) to study the ecological process governing hydrophyte-associated bacterial communities. The results demonstrated that hydrophyte-associated bacterial communities were affected more by the hydrophyte host species (HEEI = 2.40) than by the environment (HEEI = 1.00). The hydrophyte host species not only affected bacterial community assembly, but reduced the diversity and network complexity of the bacterial community relative to that of the environment. Furthermore, the core taxa of two hydrophytes were identified. Chryseobacterium was the core taxon of N. peltatum, and Burkholderia-Caballeronia-Paraburkholderia, Pseudolabrys, and Pajaroellobacter were the core taxa of P. crispus. The core taxa of P. crispus were closely related to potential denitrification-related functions of bacteria and revealed that P. crispus played a role in denitrification during aquatic ecological restoration. Overall, the results of this study highlight the need to develop approaches employing hydrophyte-associated bacteria to promote the development of hydrophytes, which will be essential for increasing the utility of hydrophyte microbiomes in the future and enhancing aquatic ecological restoration.
维持水生植物生长一直是水生生态研究的主要重点。水生植物微生物群落在水生植物的生长和健康中起着关键作用，但调节水生植物微生物群落组装和功能的生态过程仍不清楚。这一知识空白限制了通过管理微生物群来提高水生植物恢复水生环境能力的效果。在此，我们对三种典型水生植物（金鱼藻、荇菜和菹草）进行采样，以研究控制与水生植物相关细菌群落的生态过程。结果表明，与水生植物相关的细菌群落受水生植物宿主物种的影响（宿主效应指数HEEI = 2.40）大于受环境的影响（HEEI = 1.00）。水生植物宿主物种不仅影响细菌群落组装，而且相对于环境而言，还降低了细菌群落的多样性和网络复杂性。此外，还确定了两种水生植物的核心类群。金黄杆菌是荇菜的核心类群，伯克霍尔德氏菌-卡瓦列罗尼亚-副伯克霍尔德氏菌属、假拉布氏菌属和帕哈罗埃氏菌属是菹草的核心类群。菹草的核心类群与细菌潜在的反硝化相关功能密切相关，表明菹草在水生生态恢复过程中发挥了反硝化作用。总体而言，本研究结果强调需要开发利用与水生植物相关细菌的方法来促进水生植物的生长，这对于未来提高水生植物微生物群的效用和加强水生生态恢复至关重要。
