Fungal Diversity, Dominance, and Community Structure in the Rhizosphere of Clonal Picea mariana Plants Throughout Nursery Production Chronosequences

Fungal diversity in the rhizosphere of healthy and diseased clonal black spruce (Picea mariana) plants was analyzed with regard to nursery production chronosequences. The four key production stages were sampled: mother plants (MP), 8-week-old cuttings (B + 0), second-year cuttings (B + 1), and third...

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Veröffentlicht in:Microbial ecology 2007-11, Vol.54 (4), p.672-684
Hauptverfasser: Vujanovic, V, Hamelin, R. C, Bernier, L, Vujanovic, G, St-Arnaud, M
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Hamelin, R. C
Bernier, L
Vujanovic, G
St-Arnaud, M
description Fungal diversity in the rhizosphere of healthy and diseased clonal black spruce (Picea mariana) plants was analyzed with regard to nursery production chronosequences. The four key production stages were sampled: mother plants (MP), 8-week-old cuttings (B + 0), second-year cuttings (B + 1), and third-year cuttings (B + 2). A total of 45 fungal taxa were isolated and identified based on cultural, phenotypic, and molecular characters. Members of phylum Ascomycota dominated, followed by Basidiomycota and Zygomycota. Diagnosis characters and distance analysis of the internal transcribed spacer rDNA sequences allowed the identification of 39 ascomycetous taxa. Many belong to the order Hypocreales, families Hypocreaceae and Nectriaceae, which contain many clusters of potentially pathogenic taxa (Cylindrocladium, Fusarium, and Neonectria) and are also ecologically associated with antagonistic taxa (Chaetomium, Hypocrea, Microsphaeropsis, Penicillium, Paecilomyces, Verticillium, Trichoderma, and Sporothrix). This is also the first report of a Cylindrocladium canadense association with disease symptoms and relation with Pestalotiopsis, Fusarium, Exserochilum, Rhizoctonia, and Xenochalara fungal consortia. Both production chronosequence and plant health considerably influenced fungal taxa assemblages. Unweighted pair-group arithmetic average clustering showed that isolates from MP, B + 0, and B + 1 plant rhizospheres clustered together within healthy or diseased health classes, whereas isolates from healthy and diseased B + 2 plants clustered together. Canonical correspondence analysis revealed substantial alteration in community assemblages with regard to plant health and yielded a principal axis direction that regrouped taxa associated with diseased plant rhizosphere soil, whereas the opposite axis direction was associated with healthy plants. Two diversity indices were defined and applied to assess the fungal taxa contribution (Tc) and persistence (Pi) throughout the production.
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Many belong to the order Hypocreales, families Hypocreaceae and Nectriaceae, which contain many clusters of potentially pathogenic taxa (Cylindrocladium, Fusarium, and Neonectria) and are also ecologically associated with antagonistic taxa (Chaetomium, Hypocrea, Microsphaeropsis, Penicillium, Paecilomyces, Verticillium, Trichoderma, and Sporothrix). This is also the first report of a Cylindrocladium canadense association with disease symptoms and relation with Pestalotiopsis, Fusarium, Exserochilum, Rhizoctonia, and Xenochalara fungal consortia. Both production chronosequence and plant health considerably influenced fungal taxa assemblages. Unweighted pair-group arithmetic average clustering showed that isolates from MP, B + 0, and B + 1 plant rhizospheres clustered together within healthy or diseased health classes, whereas isolates from healthy and diseased B + 2 plants clustered together. Canonical correspondence analysis revealed substantial alteration in community assemblages with regard to plant health and yielded a principal axis direction that regrouped taxa associated with diseased plant rhizosphere soil, whereas the opposite axis direction was associated with healthy plants. 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C</creatorcontrib><creatorcontrib>Bernier, L</creatorcontrib><creatorcontrib>Vujanovic, G</creatorcontrib><creatorcontrib>St-Arnaud, M</creatorcontrib><title>Fungal Diversity, Dominance, and Community Structure in the Rhizosphere of Clonal Picea mariana Plants Throughout Nursery Production Chronosequences</title><title>Microbial ecology</title><addtitle>Microb Ecol</addtitle><description>Fungal diversity in the rhizosphere of healthy and diseased clonal black spruce (Picea mariana) plants was analyzed with regard to nursery production chronosequences. The four key production stages were sampled: mother plants (MP), 8-week-old cuttings (B + 0), second-year cuttings (B + 1), and third-year cuttings (B + 2). A total of 45 fungal taxa were isolated and identified based on cultural, phenotypic, and molecular characters. Members of phylum Ascomycota dominated, followed by Basidiomycota and Zygomycota. 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C ; Bernier, L ; Vujanovic, G ; St-Arnaud, M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c433t-348fb30831755e231dae8a3123f10e17a613e2aec0941b8b36022361493a29953</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Ascomycota</topic><topic>Ascomycota - classification</topic><topic>Ascomycota - genetics</topic><topic>Ascomycota - isolation &amp; purification</topic><topic>Basidiomycota</topic><topic>Biological and medical sciences</topic><topic>Chaetomium</topic><topic>chronosequences</topic><topic>Community structure</topic><topic>Cuttings</topic><topic>Cylindrocladium</topic><topic>Diversity indices</topic><topic>DNA, Fungal - analysis</topic><topic>DNA, Ribosomal Spacer - analysis</topic><topic>Ecosystem</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>fungal antagonists</topic><topic>fungal diseases of plants</topic><topic>Fungi</topic><topic>Fungi - classification</topic><topic>Fungi - genetics</topic><topic>Fungi - isolation &amp; purification</topic><topic>Fusarium</topic><topic>Hypocrea</topic><topic>Hypocreaceae</topic><topic>internal transcribed spacers</topic><topic>Microbiology</topic><topic>Microsphaeropsis</topic><topic>Molecular Sequence Data</topic><topic>Nectriaceae</topic><topic>nursery crops</topic><topic>Paecilomyces</topic><topic>Pathogens</topic><topic>Penicillium</topic><topic>Pestalotiopsis</topic><topic>Phylogeny</topic><topic>Picea - growth &amp; development</topic><topic>Picea - microbiology</topic><topic>Picea mariana</topic><topic>Plant diseases</topic><topic>Plant Diseases - microbiology</topic><topic>plant nurseries</topic><topic>plant pathogenic bacteria</topic><topic>Plant roots</topic><topic>Plant Roots - microbiology</topic><topic>Plants</topic><topic>Rhizoctonia</topic><topic>Rhizosphere</topic><topic>ribosomal DNA</topic><topic>Seedlings</topic><topic>Sequence Analysis, DNA</topic><topic>soil</topic><topic>Soil fungi</topic><topic>Soil Microbiology</topic><topic>species diversity</topic><topic>Sporothrix</topic><topic>Taxa</topic><topic>Trichoderma</topic><topic>Verticillium</topic><topic>Zygomycota</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Vujanovic, V</creatorcontrib><creatorcontrib>Hamelin, R. 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A total of 45 fungal taxa were isolated and identified based on cultural, phenotypic, and molecular characters. Members of phylum Ascomycota dominated, followed by Basidiomycota and Zygomycota. Diagnosis characters and distance analysis of the internal transcribed spacer rDNA sequences allowed the identification of 39 ascomycetous taxa. Many belong to the order Hypocreales, families Hypocreaceae and Nectriaceae, which contain many clusters of potentially pathogenic taxa (Cylindrocladium, Fusarium, and Neonectria) and are also ecologically associated with antagonistic taxa (Chaetomium, Hypocrea, Microsphaeropsis, Penicillium, Paecilomyces, Verticillium, Trichoderma, and Sporothrix). This is also the first report of a Cylindrocladium canadense association with disease symptoms and relation with Pestalotiopsis, Fusarium, Exserochilum, Rhizoctonia, and Xenochalara fungal consortia. Both production chronosequence and plant health considerably influenced fungal taxa assemblages. Unweighted pair-group arithmetic average clustering showed that isolates from MP, B + 0, and B + 1 plant rhizospheres clustered together within healthy or diseased health classes, whereas isolates from healthy and diseased B + 2 plants clustered together. Canonical correspondence analysis revealed substantial alteration in community assemblages with regard to plant health and yielded a principal axis direction that regrouped taxa associated with diseased plant rhizosphere soil, whereas the opposite axis direction was associated with healthy plants. Two diversity indices were defined and applied to assess the fungal taxa contribution (Tc) and persistence (Pi) throughout the production.</abstract><cop>New York, NY</cop><pub>New York : Springer-Verlag</pub><pmid>17347891</pmid><doi>10.1007/s00248-007-9226-1</doi><tpages>13</tpages></addata></record>
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source MEDLINE; JSTOR Archive Collection A-Z Listing; SpringerLink Journals - AutoHoldings
subjects Ascomycota
Ascomycota - classification
Ascomycota - genetics
Ascomycota - isolation & purification
Basidiomycota
Biological and medical sciences
Chaetomium
chronosequences
Community structure
Cuttings
Cylindrocladium
Diversity indices
DNA, Fungal - analysis
DNA, Ribosomal Spacer - analysis
Ecosystem
Fundamental and applied biological sciences. Psychology
fungal antagonists
fungal diseases of plants
Fungi
Fungi - classification
Fungi - genetics
Fungi - isolation & purification
Fusarium
Hypocrea
Hypocreaceae
internal transcribed spacers
Microbiology
Microsphaeropsis
Molecular Sequence Data
Nectriaceae
nursery crops
Paecilomyces
Pathogens
Penicillium
Pestalotiopsis
Phylogeny
Picea - growth & development
Picea - microbiology
Picea mariana
Plant diseases
Plant Diseases - microbiology
plant nurseries
plant pathogenic bacteria
Plant roots
Plant Roots - microbiology
Plants
Rhizoctonia
Rhizosphere
ribosomal DNA
Seedlings
Sequence Analysis, DNA
soil
Soil fungi
Soil Microbiology
species diversity
Sporothrix
Taxa
Trichoderma
Verticillium
Zygomycota
title Fungal Diversity, Dominance, and Community Structure in the Rhizosphere of Clonal Picea mariana Plants Throughout Nursery Production Chronosequences
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