Effect of mobilizing agents on mycoremediation and impact on the indigenous microbiota
Author(s)
Date Issued
2009
Type
Article
Abstract
BACKGROUND: Mobilizing agents (MAs) have been suggested to improve the fungal degradation of polycyclic aromatic
hydrocarbons (PAHs) in soil. Three different MAs (Tween 20, Tween 80 and soybean oil) were investigated for their ability to
stimulate contaminant degradation by either Phlebia sp. DABAC 9 or Allescheriella sp. DABAC1 in a soil spiked with amixture of
PAHs.
RESULTS: Phlebia sp. and Allescheriella sp. markedly differed in their growth capabilities under non-sterile conditions and
withoutMAs (3.0 versus 0.1 μg ergosterol g−1 soil, respectively). However, soybean oil led to a 35-fold increase of Allescheriella
sp. growth. Contaminant degradations by Phlebia sp. DABAC 9 and Allescheriella sp. DABAC 1 were best supported by soybean
oil and Tween 20, respectively. Enumeration of cultivable bacteria and denaturing gradient gel electrophoresis (DGGE) analysis
of PCR-amplified 16S rRNA showed that microbial density and biodiversity were positively affected by the mycoremediation
especially with Allescheriella sp., the use of which led to an evident detoxification.
CONCLUSIONS: Allescheriella sp. DABAC 1 appears to be a promising strain in the remediation of PAH-contaminated soils. The
different response of the two fungi to MAs addition confirms the stringent need for a preliminary lab-scale assessment of
fungus/MA combinations prior to application.
Additional information
L'articolo è disponibile sul sito dell'editore: http://www.onlinelibrary.wiley.com
Citation
Giubilei, M.A. et al. 2009. Effect of mobilizing agents on mycoremediation and impact on the indigenous microbiota. "Journal of Chemical Technology and Biotechnology" 84(6): 836-844.
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