Скачать или смотреть Rhizosphere interface microbiome reassembly by arbuscular mycorrhizal fungi weaken cadmium migration

Hong-Rui Wang, Xin-Ran Du, Zhuo-Yun Zhang, et al. 2023. Rhizosphere interface microbiome reassembly by arbuscular mycorrhizal fungi weakens cadmium migration dynamics. iMeta 2: e133. https://doi.org/10.1002/imt2.133
The prevalence of cadmium Cd-polluted agricultural soils is increasing globally, and arbuscular mycorrhizal fungi AMF can reduce the absorption of heavy metals by plants and improve mineral nutrition. However, the immobilization of the rhizosphere on cadmium is often overlooked. In this study, Glomus mosseae and Medicago sativa were established as symbiotes, and Cd migration and environmental properties in the rhizosphere were analyzed. AMF reduced Cd migration, and Cd2+ changed to an organic-bound state. AMF symbiosis treatment and Cd exposure resulted in microbial community variation, exhibiting a distinct deterministic process NTI more than2, which ultimately resulted in a core microbiome function of heavy metal resistance and nutrient cycling. AMF increased available N and P, extracellular enzyme activity LaC, LiP, and CAT, organic matter content TOC, EOC, and GRSP, and Eh of the rhizosphere soil, significantly correlating with decreased Cd migration pless than 0.05. Furthermore, AMF significantly affected root metabolism by upregulating 739 metabolites, with flavonoids being the main factor causing microbiome variation. The structural equation model and variance partial analysis revealed that the superposition of the root metabolites, microbial, and soil exhibited the maximum explanation rate for Cd migration reduction 42.4%, and the microbial model had the highest single explanation rate 15.5%. Thus, the AMF in the rhizosphere microenvironment can regulate metabolitesoilmicrobial interactions, reducing Cd migration. In summary, the study provides a new scientific explanation for how AMF improves plant Cd tolerance and offers a sustainable solution that could benefit both the environment and human health.