Arbuscular mycorrhizal fungal diversity associated with Eleocharis obtusa and Panicum capillare growing in an extreme petroleum hydrocarbon-polluted sedimentation basin

Arbuscular mycorrhizal fungi (AMF) have been extensively studied in natural and agricultural ecosystems, but little is known about their diversity and community structure in highly petroleum-polluted soils. In this study, we described an unexpected diversity of AMF in a sedimentation basin of a form...

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Bibliographic Details
Published in:FEMS microbiology letters 2015-06, Vol.362 (12), p.fnv081-fnv081
Main Authors: de la Providencia, Ivan E., Stefani, Franck O.P., Labridy, Manuel, St-Arnaud, Marc, Hijri, Mohamed
Format: Article
Language:English
Subjects:
Agricultural ecosystems
Arbuscular mycorrhizas
Biodiversity
Chemical industry
Cloning
Communities
Community structure
Contaminated sediments
Ecosystems
Eleocharis - microbiology
Eleocharis obtusa
Fungi
Glomeromycota
Harsh environments
Hydrocarbons
Microbiology
Molecular Sequence Data
Mycorrhizae - classification
Mycorrhizae - drug effects
Mycorrhizae - genetics
Mycorrhizae - isolation & purification
Mycorrhizae - physiology
Panicum - microbiology
Panicum capillare
Petrochemicals industry
Petroleum
Petroleum - toxicity
Petroleum hydrocarbons
Rhizosphere
RNA, Ribosomal, 18S - genetics
Sediment pollution
Sedimentary basins
Sedimentation
Sedimentation & deposition
Sediments
Soil contamination
Soil Microbiology
Soil Pollutants - toxicity
Soil pollution
Soil structure
Soils
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Summary:Arbuscular mycorrhizal fungi (AMF) have been extensively studied in natural and agricultural ecosystems, but little is known about their diversity and community structure in highly petroleum-polluted soils. In this study, we described an unexpected diversity of AMF in a sedimentation basin of a former petrochemical plant, in which petroleum hydrocarbon (PH) wastes were dumped for many decades. We used high-throughput PCR, cloning and sequencing of 18S rDNA to assess the molecular diversity of AMF associated with Eleocharis obtusa and Panicum capillare spontaneously inhabiting extremely PH-contaminated sediments. The analyses of rhizosphere and root samples over two years showed a remarkable AMF richness comparable with that found in temperate natural ecosystems. Twenty-one taxa, encompassing the major families within Glomeromycota, were detected. The most abundant OTUs belong to genera Claroideoglomus, Diversispora, Rhizophagus and Paraglomus. Both plants had very similar overall community structures and OTU abundances; however, AMF community structure differed when comparing the overall OTU distribution across the two years of sampling. This could be likely explained by variations in precipitations between 2011 and 2012. Our study provides the first view of AMF molecular diversity in soils extremely polluted by PH, and demonstrated the ability of AMF to colonize and establish in harsh environments. Remarkable diversity of arbuscular mycorrhizal fungi was found in an extreme petroleum hydrocarbon-polluted sedimentation basin.
ISSN:1574-6968
0378-1097
1574-6968
DOI:10.1093/femsle/fnv081