Insights into the shift of microbial community related to nitrogen cycle, especially N2O in vanadium-polluted soil. (1st April 2023)

• Record Type: Journal Article
• Authors: Liu, Xuna; Pang, Lina; Yue, Yao; Li, Hongna; Chatzisymeon, Efthalia; Lu, Yuanyuan; Yang, Ping
• Is Part Of: Environmental pollution. Volume 322(2023)
• Publication Date: 2023-04-01
• Subjects: Greenhouse gas -- Vanadium forms -- Nitrous oxide -- Soil nitrogen cycle -- Microbial community; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2023.121253
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract: Soil is a vital contributor to the production of nitrous oxide (N2 O), a potent greenhouse gas, through the nitrogen cycle, which can be influenced by accumulated vanadium (V) in soil but it is less pronounced. This work investigated the response of soil N2 O fluxes along with major nitrogen cycle products (ammonium, nitrate, and nitrite) to different vanadium contents (0, 200, 500, 800, and 1100 mg V/kg), and the underlying microbial mechanisms. N2 O fluxes was significantly influenced at high V content (1100 mg V/kg) due to its corresponding high water-soluble V content. Microbial composition and their correlations with nitrogen cycle products showed that microbes in dominant phyla ( Actinobacteriota and Proteobacteria ) and genus ( Nocardioides, Lysobacter, Sphingomonas, and Marmoricola ) might be the important contributor to N2 O fluxes regardless of the V content. Moreover, high V contents (800, and 1100 mg V/kg) could enrich microbes involved in nitrogen cycle, but weaken their correlations with nitrogen-related products, such as in genus Bacillus, and change microbial correlation with N2 O from associated with nitrate and nitrite to ammonium. Meanwhile, functional gene predication results showed that denitrifying genes nirKS and nosZ were negatively and positively correlated with V contents, respectively. These all further suggested that the shift of possible N2 O metabolic pathways induced mainly by water-soluble V might be the underlying reason for N2 O fluxes. These findings promote an understanding of the potential effect of metal pollution on N2 O fluxes in soil. Graphical abstract: Image 1 Highlights: Water-soluble V affected N2 O emission indirectly via nitrate and nitrite contents. Nitrogen cycling bacteria varied at phylum and genus levels with V contents. High V contents enriched some microbes with both metal-tolerance and nitrogen cycle.