Changes in the root-associated fungal communities along a primary succession gradient analysed by 454 pyrosequencing.
Identifieur interne : 001F73 ( Main/Corpus ); précédent : 001F72; suivant : 001F74Changes in the root-associated fungal communities along a primary succession gradient analysed by 454 pyrosequencing.
Auteurs : Rakel Blaalid ; Tor Carlsen ; Surendra Kumar ; Rune Halvorsen ; Karl Inne Ugland ; Giovanni Fontana ; H Vard KauserudSource :
- Molecular ecology [ 1365-294X ] ; 2012.
English descriptors
- KwdEn :
- Basidiomycota (classification), Basidiomycota (genetics), DNA, Fungal (analysis), DNA, Ribosomal Spacer (analysis), Ecosystem (MeSH), Ice Cover (MeSH), Mycorrhizae (genetics), Norway (MeSH), Plant Roots (microbiology), Polygonaceae (microbiology), Sequence Analysis, DNA (methods), Species Specificity (MeSH).
- MESH :
- chemical , analysis : DNA, Fungal, DNA, Ribosomal Spacer.
- geographic : Norway.
- classification : Basidiomycota.
- genetics : Basidiomycota, Mycorrhizae.
- methods : Sequence Analysis, DNA.
- microbiology : Plant Roots, Polygonaceae.
- Ecosystem, Ice Cover, Species Specificity.
Abstract
We investigated changes in the root-associated fungal communities associated with the ectomycorrhizal herb Bistorta vivipara along a primary succession gradient using 454 amplicon sequencing. Our main objective was to assess the degree of variation in fungal richness and community composition as vegetation cover increases along the chronosequence. Sixty root systems of B. vivipara were sampled in vegetation zones delimited by dated moraines in front of a retreating glacier in Norway. We extracted DNA from rinsed root systems, amplified the ITS1 region using fungal-specific primers and analysed the amplicons using 454 sequencing. Between 437 and 5063 sequences were obtained from each root system. Clustering analyses using a 98.5% sequence similarity cut-off yielded a total of 470 operational taxonomic units (OTUs), excluding singletons. Between eight and 41 fungal OTUs were detected within each root system. Already in the first stage of succession, a high fungal diversity was present in the B. vivipara root systems. Total number of OTUs increased significantly along the gradient towards climax vegetation, but the average number of OTUs per root system stayed unchanged. There was a high patchiness in distribution of fungal OTUs across root systems, indicating that stochastic processes to a large extent structure the fungal communities. However, time since deglaciation had impact on the fungal community structure, as a systematic shift in the community composition was observed along the chronosequence. Ectomycorrhizal basidiomycetes were the dominant fungi in the roots of B. vivipara, when it comes to both number of OTUs and number of sequences.
DOI: 10.1111/j.1365-294x.2011.05214.x
PubMed: 22590726
Links to Exploration step
pubmed:22590726Le document en format XML
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<affiliation><nlm:affiliation>Department of Biology, University of Oslo, Oslo, Norway. rakel.blaalid@bio.uio.no</nlm:affiliation>
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<author><name sortKey="Carlsen, Tor" sort="Carlsen, Tor" uniqKey="Carlsen T" first="Tor" last="Carlsen">Tor Carlsen</name>
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<author><name sortKey="Kumar, Surendra" sort="Kumar, Surendra" uniqKey="Kumar S" first="Surendra" last="Kumar">Surendra Kumar</name>
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<author><name sortKey="Halvorsen, Rune" sort="Halvorsen, Rune" uniqKey="Halvorsen R" first="Rune" last="Halvorsen">Rune Halvorsen</name>
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<author><name sortKey="Ugland, Karl Inne" sort="Ugland, Karl Inne" uniqKey="Ugland K" first="Karl Inne" last="Ugland">Karl Inne Ugland</name>
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<author><name sortKey="Fontana, Giovanni" sort="Fontana, Giovanni" uniqKey="Fontana G" first="Giovanni" last="Fontana">Giovanni Fontana</name>
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<author><name sortKey="Kauserud, H Vard" sort="Kauserud, H Vard" uniqKey="Kauserud H" first="H Vard" last="Kauserud">H Vard Kauserud</name>
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<term>Ecosystem (MeSH)</term>
<term>Ice Cover (MeSH)</term>
<term>Mycorrhizae (genetics)</term>
<term>Norway (MeSH)</term>
<term>Plant Roots (microbiology)</term>
<term>Polygonaceae (microbiology)</term>
<term>Sequence Analysis, DNA (methods)</term>
<term>Species Specificity (MeSH)</term>
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<front><div type="abstract" xml:lang="en">We investigated changes in the root-associated fungal communities associated with the ectomycorrhizal herb Bistorta vivipara along a primary succession gradient using 454 amplicon sequencing. Our main objective was to assess the degree of variation in fungal richness and community composition as vegetation cover increases along the chronosequence. Sixty root systems of B. vivipara were sampled in vegetation zones delimited by dated moraines in front of a retreating glacier in Norway. We extracted DNA from rinsed root systems, amplified the ITS1 region using fungal-specific primers and analysed the amplicons using 454 sequencing. Between 437 and 5063 sequences were obtained from each root system. Clustering analyses using a 98.5% sequence similarity cut-off yielded a total of 470 operational taxonomic units (OTUs), excluding singletons. Between eight and 41 fungal OTUs were detected within each root system. Already in the first stage of succession, a high fungal diversity was present in the B. vivipara root systems. Total number of OTUs increased significantly along the gradient towards climax vegetation, but the average number of OTUs per root system stayed unchanged. There was a high patchiness in distribution of fungal OTUs across root systems, indicating that stochastic processes to a large extent structure the fungal communities. However, time since deglaciation had impact on the fungal community structure, as a systematic shift in the community composition was observed along the chronosequence. Ectomycorrhizal basidiomycetes were the dominant fungi in the roots of B. vivipara, when it comes to both number of OTUs and number of sequences.</div>
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<Abstract><AbstractText>We investigated changes in the root-associated fungal communities associated with the ectomycorrhizal herb Bistorta vivipara along a primary succession gradient using 454 amplicon sequencing. Our main objective was to assess the degree of variation in fungal richness and community composition as vegetation cover increases along the chronosequence. Sixty root systems of B. vivipara were sampled in vegetation zones delimited by dated moraines in front of a retreating glacier in Norway. We extracted DNA from rinsed root systems, amplified the ITS1 region using fungal-specific primers and analysed the amplicons using 454 sequencing. Between 437 and 5063 sequences were obtained from each root system. Clustering analyses using a 98.5% sequence similarity cut-off yielded a total of 470 operational taxonomic units (OTUs), excluding singletons. Between eight and 41 fungal OTUs were detected within each root system. Already in the first stage of succession, a high fungal diversity was present in the B. vivipara root systems. Total number of OTUs increased significantly along the gradient towards climax vegetation, but the average number of OTUs per root system stayed unchanged. There was a high patchiness in distribution of fungal OTUs across root systems, indicating that stochastic processes to a large extent structure the fungal communities. However, time since deglaciation had impact on the fungal community structure, as a systematic shift in the community composition was observed along the chronosequence. Ectomycorrhizal basidiomycetes were the dominant fungi in the roots of B. vivipara, when it comes to both number of OTUs and number of sequences.</AbstractText>
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