Abstract
Aromatic hydrocarbons are pollutants which have mutagenic and carcinogenic properties as well as relatively high hydrosolubility. Their presence in soils makes techniques such as bioremediation an important topic for research. In this work, the effect of arbuscular mycorrhiza (AM) on the persistence of benzene, toluene, ethylbenzene and xylene (BTEX) in artificially contaminated substrates was evaluated. Leek plants were grown with three AM fungal species using a specially designed mesocosm system, in which internal air and substrate samples were analyzed by gas chromatography for BTEX content. Strong reductions in the BTEX concentration in substrates were generally observed in the presence of mycorrhizal plants. Residual BTEX content ranged between nearly total disappearance (<2%) and 40% of the original concentration, whereas there was a high persistence of hydrocarbons in the samples of substrate alone or with non-mycorrhizal plants. These results provide first evidence for an influence of AM activity in reducing pollution of substrates by aromatic hydrocarbons.





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Acknowledgements
We gratefully acknowledge Drs. Chiara Lotto, Lara Boatti, Elisa Bona, Andrea Copetta, Giulio Lanati, Nadia Massa and Paola Falaschi for their important support in all the phases of the work, and Mr. Guido Ronzat for his help in the building and setting up of the mesocosm cabinets. This work was funded by the EU-RTD project GENOMYCA (QLK5-2000-01319 NAS QLRT-CT-2001-02804).
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Andrea Volante and Guido Lingua contributed equally to this paper
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Volante, A., Lingua, G., Cesaro, P. et al. Influence of three species of arbuscular mycorrhizal fungi on the persistence of aromatic hydrocarbons in contaminated substrates. Mycorrhiza 16, 43–50 (2005). https://doi.org/10.1007/s00572-005-0012-y
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DOI: https://doi.org/10.1007/s00572-005-0012-y