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soil microorganisms 1

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Response of soil microorganisms to vegetational succession in Ziwuling Forest

Hong ZHANG, Jialong LU, Shiwei ZHAO,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 4,   Pages 421-427 doi: 10.1007/s11783-009-0147-8

Abstract: This study investigates the changes in soil microbial populations as vegetational succession progressSoil bacteria, fungi, and actinomycetes increased as the vegetational succession progressed.Knowledge about soil microbial populations is important for forecasting vegetational succession and determining

Keywords： soil microorganisms     vegetational succession     Ziwuling Forest    

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The Successional Pattern of Microbial Communities and Critical Genes of Consortia Subsisting on Chloramphenicol and Its Metabolites Through Long-Term Domestication

Jiayu Zhang, Kaiyan Zhou, Fangliang Guo, Huaxin Lei, Renxin Zhao, Lin Lin, Xiaoyan Li, Bing Li

Engineering 2023, Volume 31, Issue 12,   Pages 59-69 doi: 10.1016/j.eng.2023.07.009

Abstract:

As a widespread emerging contaminant, chloramphenicol (CAP) adversely impacts ecological communities in the water environment. Biological treatment is widely used for aquatic pollutant removal, and the performance of functional microbes determines its outcome. Herein, a consortium with a powerful CAP-degrading capacity was domesticated from activated sludge. As the common degradation products of CAP, 4-nitrobenzoic acid (PNB) and 2,2-dichloroacetic acid (DCA) were also used as the sole substrates for long-term domestication. The successional pattern of the microbial community and critical functional genes through the 2.5-year domestication was revealed by metagenomic analysis. Sphingomonas, Caballeronia, and Cupriavidus became the most dominant populations in the CAP-, PNB-, and DCA-degrading consortia, respectively, and they were crucial degraders of PNB and DCA. Their collaboration contributed to the high mineralization rate of CAP. PNB was transformed into protocatechuic acid (PCA) and then mineralized through meta-cleavage and ortho-cleavage pathways. Crucial functional genes involved in CAP, PNB, and DCA metabolism, including CAP acetyltransferase, CAP oxidoreductase, haloacid dehalogenases, and protocatechuate dioxygenases, were significantly enriched in consortia. pH and carbon source had significant impacts on CAP biodegradation efficiency. The domesticated consortia and isolated strains are necessary microbial resources to enhance the bioremediation of CAP-, PNB-, or DCA-polluted environments.

Keywords： Antibiotic     Biodegradation     Metabolism     Microbial community succession     Metagenome    

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Title Author Date Type Operation

Response of soil microorganisms to vegetational succession in Ziwuling Forest

Hong ZHANG, Jialong LU, Shiwei ZHAO,

Journal Article

The Successional Pattern of Microbial Communities and Critical Genes of Consortia Subsisting on Chloramphenicol and Its Metabolites Through Long-Term Domestication

Jiayu Zhang, Kaiyan Zhou, Fangliang Guo, Huaxin Lei, Renxin Zhao, Lin Lin, Xiaoyan Li, Bing Li

Journal Article