Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Bacterial assemblages imply methylmercury production at the rice-soil system
https://orcid.org/0000-0002-5473-4902
https://orcid.org/0000-0003-2639-0513
https://orcid.org/0000-0003-1310-8419
https://orcid.org/0000-0001-6915-0953
Graphical abstract Display Omitted
Highlights Methylators were dominating in rice rhizosphere, rather than the bulk soil. Hg-promoted methylators are key taxa in the rhizosphere at the flowering stage. In planta demethylation and methylation in rice roots are possible. Desulfovibrionaceae may play an important role in Hg detoxification of rice.
Abstract The plant microbiota can affect plant health and fitness by promoting methylmercury (MeHg) production in paddy soil. Although most well-known mercury (Hg) methylators are observed in the soil, it remains unclear how rice rhizosphere assemblages alter MeHg production. Here, we used network analyses of microbial diversity to identify bulk soil (BS), rhizosphere (RS) and root bacterial networks during rice development at Hg gradients. Hg gradients greatly impacted the niche-sharing of taxa significantly relating to MeHg/THg, while plant development had little effect. In RS networks, Hg gradients increased the proportion of MeHg-related nodes in total nodes from 37.88% to 45.76%, but plant development enhanced from 48.59% to 50.41%. The module hub and connector in RS networks included taxa positively (Nitrososphaeracea, Vicinamibacteraceae and Oxalobacteraceae) and negatively (Gracilibacteraceae) correlating with MeHg/THg at the blooming stage. In BS networks, Deinococcaceae and Paludibacteraceae were positively related to MeHg/THg, and constituted the connector at the reviving stage and the module hub at the blooming stage. Soil with an Hg concentration of 30 mg kg−1 increased the complexity and connectivity of root microbial networks, although microbial community structure in roots was less affected by Hg gradients and plant development. As most frequent connector in root microbial networks, Desulfovibrionaceae did not significantly correlate with MeHg/THg, but was likely to play an important role in the response to Hg stress.
Bacterial assemblages imply methylmercury production at the rice-soil system
https://orcid.org/0000-0002-5473-4902
https://orcid.org/0000-0003-2639-0513
https://orcid.org/0000-0003-1310-8419
https://orcid.org/0000-0001-6915-0953
Graphical abstract Display Omitted
Highlights Methylators were dominating in rice rhizosphere, rather than the bulk soil. Hg-promoted methylators are key taxa in the rhizosphere at the flowering stage. In planta demethylation and methylation in rice roots are possible. Desulfovibrionaceae may play an important role in Hg detoxification of rice.
Abstract The plant microbiota can affect plant health and fitness by promoting methylmercury (MeHg) production in paddy soil. Although most well-known mercury (Hg) methylators are observed in the soil, it remains unclear how rice rhizosphere assemblages alter MeHg production. Here, we used network analyses of microbial diversity to identify bulk soil (BS), rhizosphere (RS) and root bacterial networks during rice development at Hg gradients. Hg gradients greatly impacted the niche-sharing of taxa significantly relating to MeHg/THg, while plant development had little effect. In RS networks, Hg gradients increased the proportion of MeHg-related nodes in total nodes from 37.88% to 45.76%, but plant development enhanced from 48.59% to 50.41%. The module hub and connector in RS networks included taxa positively (Nitrososphaeracea, Vicinamibacteraceae and Oxalobacteraceae) and negatively (Gracilibacteraceae) correlating with MeHg/THg at the blooming stage. In BS networks, Deinococcaceae and Paludibacteraceae were positively related to MeHg/THg, and constituted the connector at the reviving stage and the module hub at the blooming stage. Soil with an Hg concentration of 30 mg kg−1 increased the complexity and connectivity of root microbial networks, although microbial community structure in roots was less affected by Hg gradients and plant development. As most frequent connector in root microbial networks, Desulfovibrionaceae did not significantly correlate with MeHg/THg, but was likely to play an important role in the response to Hg stress.
Bacterial assemblages imply methylmercury production at the rice-soil system
https://orcid.org/0000-0002-5473-4902
https://orcid.org/0000-0003-2639-0513
https://orcid.org/0000-0003-1310-8419
https://orcid.org/0000-0001-6915-0953
Graphical abstract Display Omitted
Highlights Methylators were dominating in rice rhizosphere, rather than the bulk soil. Hg-promoted methylators are key taxa in the rhizosphere at the flowering stage. In planta demethylation and methylation in rice roots are possible. Desulfovibrionaceae may play an important role in Hg detoxification of rice.
Abstract The plant microbiota can affect plant health and fitness by promoting methylmercury (MeHg) production in paddy soil. Although most well-known mercury (Hg) methylators are observed in the soil, it remains unclear how rice rhizosphere assemblages alter MeHg production. Here, we used network analyses of microbial diversity to identify bulk soil (BS), rhizosphere (RS) and root bacterial networks during rice development at Hg gradients. Hg gradients greatly impacted the niche-sharing of taxa significantly relating to MeHg/THg, while plant development had little effect. In RS networks, Hg gradients increased the proportion of MeHg-related nodes in total nodes from 37.88% to 45.76%, but plant development enhanced from 48.59% to 50.41%. The module hub and connector in RS networks included taxa positively (Nitrososphaeracea, Vicinamibacteraceae and Oxalobacteraceae) and negatively (Gracilibacteraceae) correlating with MeHg/THg at the blooming stage. In BS networks, Deinococcaceae and Paludibacteraceae were positively related to MeHg/THg, and constituted the connector at the reviving stage and the module hub at the blooming stage. Soil with an Hg concentration of 30 mg kg−1 increased the complexity and connectivity of root microbial networks, although microbial community structure in roots was less affected by Hg gradients and plant development. As most frequent connector in root microbial networks, Desulfovibrionaceae did not significantly correlate with MeHg/THg, but was likely to play an important role in the response to Hg stress.
Bacterial assemblages imply methylmercury production at the rice-soil system
Guo, Pan (Autor:in) / Rennenberg, Heinz (Autor:in) / Du, Hongxia (Autor:in) / Wang, Tao (Autor:in) / Gao, Lan (Autor:in) / Flemetakis, Emmanouil (Autor:in) / Hänsch, Robert (Autor:in) / Ma, Ming (Autor:in) / Wang, Dingyong (Autor:in)
24.06.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Bacterial assemblages imply methylmercury production at the rice-soil system
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