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Gewählte Publikation:

Joner, EJ; Johansen, A; Loibner, AP; de la Cruz, MA; Szolar, OH; Portal, JM; Leyval, C.
(2001): Rhizosphere effects on microbial community structure and dissipation and toxicity of polycyclic aromatic hydrocarbons (PAHs) in spiked soil.
Environ Sci Technol. 2001; 35(13):2773-2777 FullText FullText_BOKU

Abstract:
Phytoremediation of soils polluted with polycyclic aromatic hydrocarbons (PAHs) has so far neglected the possible role of the ubiquitous symbiotic associations between plant roots and fungi known as arbuscular mycorrhizas. A time course laboratory experiment with clover and ryegrass grown on spiked [500 + 500 + 50 mg kg(-1) of anthracene, chrysene and dibenz(a,h)anthracene] soil demonstrated for the first time that dissipation of condensed PAHs may be enhanced in the presence of arbuscular mycorrhiza [66 and 42% reductions in chrysene and dibenz(a,h)anthracene, respectively, versus 56 and 20% reductions in nonmycorrhizal controls]. Addition of a surfactant accelerated initial PAH dissipation but did not attain final PAH concentrations below those obtained with nonmycorrhizal plants. Toxicity tests (earthworm survival and bioluminescence inhibition in Vibrio fischeri) indicated that mycorrhiza reduced the toxicity of PAHs and/or their metabolites and counteracted a temporally enhanced toxicity mediated by surfactant addition. Phospholipid fatty acid profiles demonstrated that the imposed treatments altered the microbial community structure and indicated that the mycorrhiza-associated microflora was responsible for the observed reductions in PAH concentrations in the presence of mycorrhiza.
Autor/innen der BOKU Wien:
Loibner Andreas Paul
BOKU Gendermonitor:

Find related publications in this database (using NML MeSH Indexing)
Animals -
Fungi - physiology
Lolium - microbiology
Oligochaeta - microbiology
Plant Roots - microbiology
Polycyclic Hydrocarbons, Aromatic - metabolism
Population Dynamics - metabolism
Soil Microbiology - metabolism
Soil Pollutants - metabolism
Surface-Active Agents - metabolism
Toxicity Tests - metabolism
Vibrio - drug effects



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