Fungal hyphae stimulate bacterial degradation of 2,6-dichlorobenzamide (BAM)

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  • Berith Elkaer Knudsen, Geol Survey Denmark & Greenland GEUS, Dept Geochem, Danmark
  • Lea Ellegaard-Jensen
  • Christian Nyrop Albers, Geol Survey Denmark & Greenland GEUS, Dept Geochem, Danmark
  • Soren Rosendahl, Terrestrial Ecology, Department of Biology, University of Copenhagen, Danmark
  • Jens Aamand, Geol Survey Denmark & Greenland GEUS, Dept Geochem, Danmark

Introduction of specific degrading microorganisms into polluted soil or aquifers is a promising remediation technology provided that the organisms survive and spread in the environment. We suggest that consortia, rather than single strains, may be better suited to overcome these challenges.

Here we introduced a fungal bacterial consortium consisting of Mortierella sp. LEJ702 and the 2,6-dichlorobenzamide (BAM)-degrading Aminobacter sp. MSH1 into small sand columns. A more rapid mineralisation of BAM was obtained by the consortium compared to MSH1 alone especially at lower moisture contents. Results from quantitative real-time polymerase chain reaction (qPCR) demonstrated better spreading of Aminobacter when Mortierella was present suggesting that fungal hyphae may stimulate bacterial dispersal. Extraction and analysis of BAM indicated that translocation of the compound was also affected by the fungal hyphae in the sand. This suggests that fungal bacterial consortia are promising for successful bioremediation of pesticide contamination. (C) 2013 Elsevier Ltd. All rights reserved.

OriginalsprogEngelsk
TidsskriftEnvironmental Pollution
Vol/bind181
Sider (fra-til)122-127
Antal sider6
ISSN0269-7491
DOI
StatusUdgivet - okt. 2013
Eksternt udgivetJa

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