Metagenome sequencing to unveil microbial community composition and prevalence of antibiotic and metal resistance genes in hypersaline and hyperalkaline Lonar Lake, India

TitleMetagenome sequencing to unveil microbial community composition and prevalence of antibiotic and metal resistance genes in hypersaline and hyperalkaline Lonar Lake, India
Publication TypeJournal Article
Year of Publication2020
AuthorsChakraborty, J, Sapkale, V, Shah, M, Rajput, V, Mehetre, G, Agawane, S, Kamble, S, Dharne, M
JournalEcological Indicators
Volume110
Pagination105827
Date PublishedMAR
Type of ArticleArticle
ISSN1470-160X
KeywordsArchaeal diversity, ARGs, Bacterial diversity, Illumina sequencing, Lonar lake, MRGs
Abstract

Lonar Lake (India) is a hyperalkaline and hypersaline soda lake encompassing unique microbial composition and functions. This ecosystem has not been explored for taxonomic diversity and functional aspects (with emphasis on antibiotic and metal resistance genes) using whole metagenome sequencing for multiple years. Bacterial diversity analysis during year 2013, 2016, and 2018 depicted differences in the dominance of Proteobacteria, Firmicutes and Bacteroidetes. For archaeal diversity, a similar pattern persisted with higher abundance of Euryarchaeota. Functional metagenome analyses, indicated presence of antibiotic resistance gene (ARG) and metal resistance gene (MRG) profiles in the lake. A wider continuum of resistance genes with dominant ARG types as multidrug resistance efflux pumps and beta-lactams were also observed. The lake resistome demonstrated fluoroquinolone and acriflavine resistance genes indicating sewage water contamination in the lake. The MRGs linked with resistance to toxic metals (arsenic, cobalt, cadmium, copper, and zinc) and cation efflux protein CusA and cobalt-zinc-cadmium resistance protein revealed metal contamination. This study could be a baseline for understanding prevalence of antibiotic and metal resistance mechanisms resulting from various anthropogenic activities nearby lake, and find integrated approaches for conservation of the precious Lonar Lake ecosystem.

DOI10.1016/j.ecolind.2019.105827
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

4.229

Divison category: 
Biochemical Sciences
Chemical Engineering & Process Development
National Collection of Industrial Micr-organisms (NCIM)

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