Molecular and pathogenic variation within Melampsora on Salix in western North America reveals numerous cryptic species.
Identifieur interne : 000251 ( Ncbi/Curation ); précédent : 000250; suivant : 000252Molecular and pathogenic variation within Melampsora on Salix in western North America reveals numerous cryptic species.
Auteurs : Chandalin Bennett [États-Unis] ; M Catherine Aime ; George NewcombeSource :
- Mycologia [ 0027-5514 ]
Descripteurs français
- KwdFr :
- ADN fongique (analyse), ADN fongique (génétique), ADN ribosomique (analyse), ADN ribosomique (génétique), ARN ribosomique 28S (analyse), ARN ribosomique 28S (génétique), Alignement de séquences (MeSH), Amérique du Nord (MeSH), Analyse de séquence d'ADN (MeSH), Basidiomycota (classification), Basidiomycota (génétique), Données de séquences moléculaires (MeSH), Espaceur de l'ADN ribosomique (analyse), Espaceur de l'ADN ribosomique (génétique), Maladies des plantes (microbiologie), Microscopie électronique à balayage (MeSH), Phylogenèse (MeSH), Réaction de polymérisation en chaîne (MeSH), Salix (microbiologie), Spores fongiques (classification), Séquence nucléotidique (MeSH), États du Nord-Ouest des États-Unis (MeSH).
- MESH :
- analyse : ADN fongique, ADN ribosomique, ARN ribosomique 28S, Espaceur de l'ADN ribosomique.
- génétique : ADN fongique, ADN ribosomique, ARN ribosomique 28S, Basidiomycota, Espaceur de l'ADN ribosomique, Spores fongiques.
- microbiologie : Maladies des plantes, Salix.
- Alignement de séquences, Amérique du Nord, Analyse de séquence d'ADN, Données de séquences moléculaires, Microscopie électronique à balayage, Phylogenèse, Réaction de polymérisation en chaîne, Séquence nucléotidique, États du Nord-Ouest des États-Unis.
English descriptors
- KwdEn :
- Base Sequence (MeSH), Basidiomycota (classification), Basidiomycota (genetics), DNA, Fungal (analysis), DNA, Fungal (genetics), DNA, Ribosomal (analysis), DNA, Ribosomal (genetics), DNA, Ribosomal Spacer (analysis), DNA, Ribosomal Spacer (genetics), Microscopy, Electron, Scanning (MeSH), Molecular Sequence Data (MeSH), North America (MeSH), Northwestern United States (MeSH), Phylogeny (MeSH), Plant Diseases (microbiology), Polymerase Chain Reaction (MeSH), RNA, Ribosomal, 28S (analysis), RNA, Ribosomal, 28S (genetics), Salix (microbiology), Sequence Alignment (MeSH), Sequence Analysis, DNA (MeSH), Spores, Fungal (classification).
- MESH :
- chemical , analysis : DNA, Fungal, DNA, Ribosomal, DNA, Ribosomal Spacer, RNA, Ribosomal, 28S.
- chemical , genetics : RNA, Ribosomal, 28S.
- geographic : North America, Northwestern United States.
- classification : Basidiomycota, Spores, Fungal.
- genetics : Basidiomycota, DNA, Fungal, DNA, Ribosomal, DNA, Ribosomal Spacer.
- microbiology : Plant Diseases, Salix.
- Base Sequence, Microscopy, Electron, Scanning, Molecular Sequence Data, Phylogeny, Polymerase Chain Reaction, Sequence Alignment, Sequence Analysis, DNA.
Abstract
In North America Melampsora rusts that parasitize willows (Salix species) have never been adequately studied and mostly have been referred to a collective species, Melampsora epitea (Kunze & Schm.) Thüm, of European origin. Even taxa that are nominally distinct from M. epitea, such as M. abieti-caprearum and M. paradoxa, currently are considered to be "races" of M. epitea. Within the range of our field surveys and collections in the Pacific Northwest and the Southwest only two species of Melampsora thus were expected: M. epitea (including its races) and M. ribesii-purpureae. In this study of Melampsora on 19 species of Salix in the western United States 14 phylogenetic species, or phylotypes, were apparent from nuclear rDNA sequencing of 140 collections or isolates. Our collections of the races of M. epitea, M. abieti-caprearum and M. epitea f. sp. tsugae belonged to one phylotype, termed lineage 'N'. Assuming that M. ribesii-purpureae represents one other phylotype, 12 phylotypes still are unaccounted for by current taxonomy. Moreover Eurasian M. ribesii-purpureae was not closely related to any of the phylotypes reported here. Even more problematic was the resistance of Eurasian species of Salix, including the type host of M. epitea, S. alba, to North American Melampsora, including phylotype 'N', in both the field and in inoculation experiments. These results suggest the need for the description of many new species of Melampsora on Salix in western North America. Additional analyses presented here might guide further research in this direction.
DOI: 10.3852/10-289
PubMed: 21558505
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pubmed:21558505Le document en format XML
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<term>Basidiomycota (classification)</term>
<term>Basidiomycota (genetics)</term>
<term>DNA, Fungal (analysis)</term>
<term>DNA, Fungal (genetics)</term>
<term>DNA, Ribosomal (analysis)</term>
<term>DNA, Ribosomal (genetics)</term>
<term>DNA, Ribosomal Spacer (analysis)</term>
<term>DNA, Ribosomal Spacer (genetics)</term>
<term>Microscopy, Electron, Scanning (MeSH)</term>
<term>Molecular Sequence Data (MeSH)</term>
<term>North America (MeSH)</term>
<term>Northwestern United States (MeSH)</term>
<term>Phylogeny (MeSH)</term>
<term>Plant Diseases (microbiology)</term>
<term>Polymerase Chain Reaction (MeSH)</term>
<term>RNA, Ribosomal, 28S (analysis)</term>
<term>RNA, Ribosomal, 28S (genetics)</term>
<term>Salix (microbiology)</term>
<term>Sequence Alignment (MeSH)</term>
<term>Sequence Analysis, DNA (MeSH)</term>
<term>Spores, Fungal (classification)</term>
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<term>ADN fongique (génétique)</term>
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<term>ADN ribosomique (génétique)</term>
<term>ARN ribosomique 28S (analyse)</term>
<term>ARN ribosomique 28S (génétique)</term>
<term>Alignement de séquences (MeSH)</term>
<term>Amérique du Nord (MeSH)</term>
<term>Analyse de séquence d'ADN (MeSH)</term>
<term>Basidiomycota (classification)</term>
<term>Basidiomycota (génétique)</term>
<term>Données de séquences moléculaires (MeSH)</term>
<term>Espaceur de l'ADN ribosomique (analyse)</term>
<term>Espaceur de l'ADN ribosomique (génétique)</term>
<term>Maladies des plantes (microbiologie)</term>
<term>Microscopie électronique à balayage (MeSH)</term>
<term>Phylogenèse (MeSH)</term>
<term>Réaction de polymérisation en chaîne (MeSH)</term>
<term>Salix (microbiologie)</term>
<term>Spores fongiques (classification)</term>
<term>Séquence nucléotidique (MeSH)</term>
<term>États du Nord-Ouest des États-Unis (MeSH)</term>
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<term>DNA, Ribosomal Spacer</term>
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<term>DNA, Ribosomal</term>
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<term>ADN ribosomique</term>
<term>ARN ribosomique 28S</term>
<term>Basidiomycota</term>
<term>Espaceur de l'ADN ribosomique</term>
<term>Spores fongiques</term>
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<term>Données de séquences moléculaires</term>
<term>Microscopie électronique à balayage</term>
<term>Phylogenèse</term>
<term>Réaction de polymérisation en chaîne</term>
<term>Séquence nucléotidique</term>
<term>États du Nord-Ouest des États-Unis</term>
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<front><div type="abstract" xml:lang="en">In North America Melampsora rusts that parasitize willows (Salix species) have never been adequately studied and mostly have been referred to a collective species, Melampsora epitea (Kunze & Schm.) Thüm, of European origin. Even taxa that are nominally distinct from M. epitea, such as M. abieti-caprearum and M. paradoxa, currently are considered to be "races" of M. epitea. Within the range of our field surveys and collections in the Pacific Northwest and the Southwest only two species of Melampsora thus were expected: M. epitea (including its races) and M. ribesii-purpureae. In this study of Melampsora on 19 species of Salix in the western United States 14 phylogenetic species, or phylotypes, were apparent from nuclear rDNA sequencing of 140 collections or isolates. Our collections of the races of M. epitea, M. abieti-caprearum and M. epitea f. sp. tsugae belonged to one phylotype, termed lineage 'N'. Assuming that M. ribesii-purpureae represents one other phylotype, 12 phylotypes still are unaccounted for by current taxonomy. Moreover Eurasian M. ribesii-purpureae was not closely related to any of the phylotypes reported here. Even more problematic was the resistance of Eurasian species of Salix, including the type host of M. epitea, S. alba, to North American Melampsora, including phylotype 'N', in both the field and in inoculation experiments. These results suggest the need for the description of many new species of Melampsora on Salix in western North America. Additional analyses presented here might guide further research in this direction.</div>
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