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Composition and co-occurrence network of the rhizosphere bacterial community of two emergent macrophytes and implications for phytoremediation
Marine and Freshwater Research ( IF 1.8 ) Pub Date : 2021-02-05 , DOI: 10.1071/mf20082
Xiaomin Zhang , Rujia He , Rui Su , Jin Zeng , Qi Zhou , Rui Huang , Dayong Zhao , Lin Guo , Fei He , Zhongbo Yu

Microorganisms of the rhizosphere play essential roles in plant metabolism, growth and productivity. Phragmites australis and Triarrhena lutarioriparia are two commonly found emergent macrophytes of the Gramineae family. P. australis is widely used in constructed or artificial wetlands, whereas T. lutarioriparia is found in natural environments. Thus, these two macrophytes have different ecological functions within aquatic ecosystems. In this study we used 16S rRNA gene-based high-throughput sequencing to compare the diversity, composition and co-occurrence networks of the rhizosphere bacterial communities of each macrophyte to better understand their respective ecological functions. The results suggested that abundant taxa in the bacterial communities had a higher richness and were more diverse in the bulk soil relative to the rhizosphere compartment. The opposite pattern was found for rare bacteria in the respective microbial communities. The bacterial rhizosphere community of P. australis contained a greater proportion of genera associated with purifying water and improving water quality than that of T. lutarioriparia. P. australis also had a more complex rhizosphere bacterial network than T. lutarioriparia. These findings provide a better understanding of the ecological functions of the two macrophytes and show that adjusting plant–bacteria interactions within the macrophyte rhizosphere community is an important aspect of phytoremediation.



中文翻译:

两种新兴大型植物根际细菌群落的组成和共现网络及其对植物修复的影响

根际微生物在植物的新陈代谢,生长和生产力中起着至关重要的作用。芦苇和小三叶草是禾本科的两种常见的大型植物。P芦苇被广泛用于建造或人工湿,而Ťlutarioriparia存在于自然环境中。因此,这两种大型植物在水生生态系统中具有不同的生态功能。在这项研究中,我们使用了16S基于rRNA基因的高通量测序,比较每个大型植物根际细菌群落的多样性,组成和共现网络,以更好地了解它们各自的生态功能。结果表明,相对于根际区,细菌群落中丰富的分类单元具有较高的丰富度,并且在散装土壤中具有更多的多样性。在各个微生物群落中发现稀有细菌的情况相反。的根际细菌群落芦苇载带净化水和改善水质比的相关属更大比例T. lutarioriparia南极疟原虫的根际细菌网络也比T. lutarioriparia。这些发现提供了对两种大型植物的生态功能的更好理解,并表明调节大型植物根际圈内植物与细菌的相互作用是植物修复的重要方面。

更新日期:2021-02-07
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