Benzyldimethyldodecyl ammonium chloride shifts the proliferation of functional genes and microbial community in natural water from eutrophic lake. (May 2018)

• Record Type: Journal Article
• Authors: Yang, Yuyi; Wang, Weibo
• Is Part Of: Environmental pollution. Volume 236(2018)
• Page Start: 355
• Page End: 365
• Publication Date: 2018-05
• Subjects: Cyanobacteria -- qacEΔ1 -- nirK -- Rheinheimera -- microbial diversity; 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.2018.01.059
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract: Benzylalkyldimethylethyl ammonium compounds are pervasive in natural environments and toxic at high concentrations. The changes in functional genes and microbial diversity in eutrophic lake samples exposed to benzyldimethyldodecyl ammonium chloride (BAC) were assessed. BAC exerted negative effects on bacteria abundance, particularly at concentrations of 100 μg L −1 and higher. A significant increase in the number of the quaternary ammonium compound-resistant gene qac A/B was recorded within the 10 μg L −1 treatment after the first day of exposure. Not all antibiotic resistance genes increased in abundance as the concentrations of BAC increased; rather, gene abundances were dependent on the gene type, concentrations of BAC, and contact time. The nitrogen fixation-related gene nifH and ammonia monooxygenase gene amoA were inhibited by high concentrations of BAC after the first day, whereas an increase of the nitrite reductase gene nirK was stimulated by exposure. Microbial communities within higher treatment levels (1000 and 10 000 μg L −1 ) exhibited significantly different community composition compared to other treatment levels and the control. Selective enrichment of Rheinheimera, Pseudomonas, and Vogesella were found in the higher treatment levels, suggesting that these bacteria have some resistance or degradation capacity to BAC. Genes related with RNA processing and modification, transcription, lipid transport and metabolism, amino acid transport and metabolism, and cell motility of microbial community function were involved in the process exposed to the BAC stress. Graphical abstract: Image 1 Highlights: Changes of abundance of functional genes expose to BAC were shown. High concentrations of BAC influenced the microbial community composition. An increase of the nitrite reductase gene nirK was stimulated by exposure of BAC. Cell mobility, lipid and amino acid metabolism involved in the response. Enrichment of Rheinheimera, Pseudomonas, and Vogesella were found. Abstract : Shift pattern in the proliferation of functional genes and microbial community in natural water from eutrophic lake exposed to BAC was assessed.