Phylogenetical approach to isolation of white-rot fungi capable of degrading polychlorinated dibenzo-p-dioxin.
Identifieur interne : 001641 ( Main/Exploration ); précédent : 001640; suivant : 001642Phylogenetical approach to isolation of white-rot fungi capable of degrading polychlorinated dibenzo-p-dioxin.
Auteurs : Ichiro Kamei [Japon] ; Hiroto Suhara ; Ryuichiro KondoSource :
- Applied microbiology and biotechnology [ 0175-7598 ] ; 2005.
Descripteurs français
- KwdFr :
- MESH :
- génétique : Basidiomycota.
- isolement et purification : Basidiomycota.
- microbiologie : Maladies des plantes.
- métabolisme : Basidiomycota, Dioxines.
- Dépollution biologique de l'environnement, Phylogenèse.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Dioxins.
- classification : Basidiomycota.
- genetics : Basidiomycota.
- isolation & purification : Basidiomycota.
- metabolism : Basidiomycota.
- microbiology : Plant Diseases.
- Biodegradation, Environmental, Phylogeny.
Abstract
A degradation experiment on PCDDs and phylogenetical analyses were carried out on newly isolated 2,7-dichlorodibenzo-p-dioxin (2,7-diCDD)-degrading white-rot fungi, strains BMC3014, BMC9152, and BMC9160. When these fungi were incubated with tri- or tetraCDDs, the substrates were degraded efficiently, and hydroxylated metabolites were detected. On the other hand, 1,3,6,8-tetrachlorodibenzo-p-dioxin was not decreased, and no metabolites were detected. Phylogenetic analysis of internal transcribed spacers (ITSs) containing rRNA gene sequence (ITS-rDNA) clarified that these strains belonged to the genus Phlebia and were closely related to the fungi Phlebia lindtneri, strains MZ-227 and MG-60, which had both been isolated as 2,7-diCDD-degrading fungi in our previous study. Based on this phylogenetical relationship, other Phlebia genera species were used for a degradation experiment on 2,7-diCDD and 1,3,6,8-tetraCDD. Phlebia acerina and Phlebia brevispora degraded 2,7-diCDD about 40 and 80%, respectively, over 14 days of incubation. It became clear that P. brevispora can degrade 1,3,6,8-tetraCDD and transform it to monohydroxy-tetraCDD, monomethoxy-tetraCDD, dimethoxy-tetraCDD, dimethoxy-triCDD, and 3,5-dichlorocatechol in the treatment cultures. In this paper, we could clearly prove for the first time by identifying the metabolites that white-rot fungus P. brevispora could degrade the recalcitrant dioxin, 1,3,6,8-tetraCDD.
DOI: 10.1007/s00253-005-0052-4
PubMed: 16133328
Affiliations:
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biologique de l'environnement (MeSH)</term><term>Maladies des plantes (microbiologie)</term><term>Phylogenèse (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Dioxins</term></keywords><keywords scheme="MESH" qualifier="classification" xml:lang="en"><term>Basidiomycota</term></keywords><keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Basidiomycota</term></keywords><keywords scheme="MESH" qualifier="génétique" xml:lang="fr"><term>Basidiomycota</term></keywords><keywords scheme="MESH" qualifier="isolation & purification" xml:lang="en"><term>Basidiomycota</term></keywords><keywords scheme="MESH" qualifier="isolement et purification" xml:lang="fr"><term>Basidiomycota</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Basidiomycota</term></keywords><keywords scheme="MESH" qualifier="microbiologie" xml:lang="fr"><term>Maladies des plantes</term></keywords><keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Plant Diseases</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Basidiomycota</term><term>Dioxines</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Biodegradation, Environmental</term><term>Phylogeny</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Dépollution biologique de l'environnement</term><term>Phylogenèse</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A degradation experiment on PCDDs and phylogenetical analyses were carried out on newly isolated 2,7-dichlorodibenzo-p-dioxin (2,7-diCDD)-degrading white-rot fungi, strains BMC3014, BMC9152, and BMC9160. When these fungi were incubated with tri- or tetraCDDs, the substrates were degraded efficiently, and hydroxylated metabolites were detected. On the other hand, 1,3,6,8-tetrachlorodibenzo-p-dioxin was not decreased, and no metabolites were detected. Phylogenetic analysis of internal transcribed spacers (ITSs) containing rRNA gene sequence (ITS-rDNA) clarified that these strains belonged to the genus Phlebia and were closely related to the fungi Phlebia lindtneri, strains MZ-227 and MG-60, which had both been isolated as 2,7-diCDD-degrading fungi in our previous study. Based on this phylogenetical relationship, other Phlebia genera species were used for a degradation experiment on 2,7-diCDD and 1,3,6,8-tetraCDD. Phlebia acerina and Phlebia brevispora degraded 2,7-diCDD about 40 and 80%, respectively, over 14 days of incubation. It became clear that P. brevispora can degrade 1,3,6,8-tetraCDD and transform it to monohydroxy-tetraCDD, monomethoxy-tetraCDD, dimethoxy-tetraCDD, dimethoxy-triCDD, and 3,5-dichlorocatechol in the treatment cultures. In this paper, we could clearly prove for the first time by identifying the metabolites that white-rot fungus P. brevispora could degrade the recalcitrant dioxin, 1,3,6,8-tetraCDD.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">16133328</PMID><DateCompleted><Year>2006</Year><Month>02</Month><Day>09</Day></DateCompleted><DateRevised><Year>2012</Year><Month>11</Month><Day>15</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">0175-7598</ISSN><JournalIssue CitedMedium="Print"><Volume>69</Volume><Issue>3</Issue><PubDate><Year>2005</Year><Month>Dec</Month></PubDate></JournalIssue><Title>Applied microbiology and biotechnology</Title><ISOAbbreviation>Appl Microbiol Biotechnol</ISOAbbreviation></Journal><ArticleTitle>Phylogenetical approach to isolation of white-rot fungi capable of degrading polychlorinated dibenzo-p-dioxin.</ArticleTitle><Pagination><MedlinePgn>358-66</MedlinePgn></Pagination><Abstract><AbstractText>A degradation experiment on PCDDs and phylogenetical analyses were carried out on newly isolated 2,7-dichlorodibenzo-p-dioxin (2,7-diCDD)-degrading white-rot fungi, strains BMC3014, BMC9152, and BMC9160. When these fungi were incubated with tri- or tetraCDDs, the substrates were degraded efficiently, and hydroxylated metabolites were detected. On the other hand, 1,3,6,8-tetrachlorodibenzo-p-dioxin was not decreased, and no metabolites were detected. Phylogenetic analysis of internal transcribed spacers (ITSs) containing rRNA gene sequence (ITS-rDNA) clarified that these strains belonged to the genus Phlebia and were closely related to the fungi Phlebia lindtneri, strains MZ-227 and MG-60, which had both been isolated as 2,7-diCDD-degrading fungi in our previous study. Based on this phylogenetical relationship, other Phlebia genera species were used for a degradation experiment on 2,7-diCDD and 1,3,6,8-tetraCDD. Phlebia acerina and Phlebia brevispora degraded 2,7-diCDD about 40 and 80%, respectively, over 14 days of incubation. It became clear that P. brevispora can degrade 1,3,6,8-tetraCDD and transform it to monohydroxy-tetraCDD, monomethoxy-tetraCDD, dimethoxy-tetraCDD, dimethoxy-triCDD, and 3,5-dichlorocatechol in the treatment cultures. 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