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Sci Total Environ. 2016 Oct 1;566-567:1588-1594. doi: 10.1016/j.scitotenv.2016.06.054. Epub 2016 Jun 14.

Distribution of class 1 integrons in a highly impacted catchment.

Author information

1
Faculty of Science and Technology, Free University of Bozen-Bolzano, Bozen-Bolzano, Italy.
2
Centre for GeoGenetics, National History Museum of Denmark, University of Copenhagen, Copenhagen, Denmark; Department of Pharmacy, Faculty of Health Science, University of Tromsø, Tromsø, Norway.
3
Department of Pharmacy, Faculty of Health Science, University of Tromsø, Tromsø, Norway.
4
Department of Life Sciences and Health Oslo and Akershus University College of Applied Sciences, Oslo, Norway; Genøk-Centre for Biosafety, Tromsø, Norway.
5
Faculty of Science and Technology, Free University of Bozen-Bolzano, Bozen-Bolzano, Italy. Electronic address: lorenzo.brusetti@unibz.it.

Abstract

Polluted compounds into freshwater sediments may select and enrich bacteria carrying specific genetic compositions. Here we examine the possible use of class 1 integrons as bioindicators in freshwater environments. Samples were collected from various sediments in an urban area (Zhangye, Gansu province, China), specifically within the city, in the industrial zone, in the surrounding agricultural area and in a nearby national park. Integrons void of gene cassettes were present in all human-impacted sampling sites. A higher diversity of class 1 integrons with various gene cassettes was found in the agricultural area. Class 1 integrons and related gene cassettes were not detected in the national park. These results suggest that the prevalence and composition of class 1 integrons could be further developed as bioindicators in polluted freshwater environments.

KEYWORDS:

Bioindicator; Class 1 integron; Freshwater; Gene cassettes; Pollution; Sediments

PMID:
27312274
DOI:
10.1016/j.scitotenv.2016.06.054
[Indexed for MEDLINE]

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