This study contributed to the understanding response of rhizosphere fungal community in AMF-assisted wetland phytoremediation under Cr stress. Therefore, Cr(VI) stress significantly affects fungal community structure, while AMF addition could increase its SOM content, and metabolic capacity, and improve fungal community tolerance to Cr stress. Moreover, Fungal community characteristics were analyzed using high-throughput sequencing of the cytochrome c metabolic pathway, NADH dehydrogenase, and NADH: ubiquinone reductase and all these functions were enhanced after AMF addition. Dominant groups relevant to Cr resistance were Ascomycota and Basidiomycota fungi. The dominant phyla were members of the Ascomycota, Basidiomycota, Mortierellomycota, and Rozellomycota. The fungal community characteristics changed through inhibition of fungal metabolic ability, as fungal abundance increased after AMF addition, and the fungal diversity increased under high Cr(VI) concentration. There were significant differences in fungal community changes under different Cr(VI) concentrations. Cr(VI) stress reduced rhizosphere soil SOM (soil organic matter) content and AMF addition improved this stress phenomenon. To investigate changes in fungal community characteristics under different Cr(VI) concentration stresses and the advantages of adding arbuscular mycorrhizal fungi (AMF), we used high throughput sequencing to characterize the fungal communities. Arbuscular mycorrhizal fungi alter rhizosphere fungal community characteristics of Acorus calamus to improve Cr resistance. Cite this article Xia G, Zhu S, Zhao W, Yang X, Sheng L, Mao H. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited. Licence This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. 2 Guizhou Minzu University, Guiyang, Guizhou, China DOI 10.7717/peerj.15681 Published Accepted Received Academic Editor Héctor Mora-Montes Subject Areas Agricultural Science, Mycology, Plant Science, Soil Science, Biogeochemistry Keywords Cr stress, Arbuscular mycorrhizal fungi, Fungal community structure, Acorus calamus, ITS rRNA sequencing technology, Phytoremediation Copyright © 2023 Xia et al.
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