PoplarRustV1, Main, Exploration, bibRecord, 000089

Host specialization of the mycoparasite Eudarluca caricis and its evolutionary relationship to Ampelomyces.

Identifieur interne : 000089 ( Main/Exploration ); précédent : 000088; suivant : 000090

Host specialization of the mycoparasite Eudarluca caricis and its evolutionary relationship to Ampelomyces.

Auteurs : Claudia Nischwitz [États-Unis] ; George Newcombe ; Cort L. Anderson

Source :

Mycological research [ 0953-7562 ] ; 2005.

RBID : pubmed:15912929

Descripteurs français

KwdFr :
- ADN fongique (analyse), ADN fongique (génétique), Ascomycota (classification), Ascomycota (physiologie), Maladies des plantes (microbiologie), Phylogenèse (MeSH), Évolution biologique (MeSH).
MESH :
- analyse : ADN fongique.
- génétique : ADN fongique.
- microbiologie : Maladies des plantes.
- physiologie : Ascomycota.
- classification : Ascomycota, Phylogenèse, Évolution biologique.

English descriptors

KwdEn :
- Ascomycota (classification), Ascomycota (physiology), Biological Evolution (MeSH), DNA, Fungal (analysis), DNA, Fungal (genetics), Phylogeny (MeSH), Plant Diseases (microbiology).
MESH :
- chemical , analysis : DNA, Fungal.
- classification : Ascomycota.
- chemical , genetics : DNA, Fungal.
- microbiology : Plant Diseases.
- physiology : Ascomycota.
- Biological Evolution, Phylogeny.

Abstract

Eudarluca caricis is assumed to be a nonspecific mycoparasite of rust fungi. The evidence for its mycoparasitism has rested on constant association with uredinia. In this study, stable isotopes provided additional evidence of mycoparasitism, as E. caricis was enriched with 15N relative to its associated rust fungus, as were parasites and mycoparasites generally with respect to their hosts. Host specificity was directly tested in inoculations in the greenhouse. Isolates of E. caricis from Puccinia on two Eurasian grasses (i.e. Holcus lanatus and Phalaris arundinacaea) did not infect Melampsora on Populus that, in contrast, was successfully infected by a poplar isolate of E. caricis. An isolate from M. medusae on P. deltoides infected a significantly greater percentage of uredinia of M. medusae on P. deltoides than uredinia of M. occidentalis on P. trichocarpa. The host specificity of the three isolates was reflected in their divergence in a phylogenetic analysis based on ITS sequences. Interestingly, the analysis revealed that mycoparasites of rust and powdery mildew fungi have evolved from a common ancestor.

DOI: 10.1017/s0953756205002431
PubMed: 15912929

Affiliations:

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Le document en format XML

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<front><div type="abstract" xml:lang="en">Eudarluca caricis is assumed to be a nonspecific mycoparasite of rust fungi. The evidence for its mycoparasitism has rested on constant association with uredinia. In this study, stable isotopes provided additional evidence of mycoparasitism, as E. caricis was enriched with 15N relative to its associated rust fungus, as were parasites and mycoparasites generally with respect to their hosts. Host specificity was directly tested in inoculations in the greenhouse. Isolates of E. caricis from Puccinia on two Eurasian grasses (i.e. Holcus lanatus and Phalaris arundinacaea) did not infect Melampsora on Populus that, in contrast, was successfully infected by a poplar isolate of E. caricis. An isolate from M. medusae on P. deltoides infected a significantly greater percentage of uredinia of M. medusae on P. deltoides than uredinia of M. occidentalis on P. trichocarpa. The host specificity of the three isolates was reflected in their divergence in a phylogenetic analysis based on ITS sequences. Interestingly, the analysis revealed that mycoparasites of rust and powdery mildew fungi have evolved from a common ancestor.</div>
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<Title>Mycological research</Title>
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Host specialization of the mycoparasite Eudarluca caricis and its evolutionary relationship to Ampelomyces.

Host specialization of the mycoparasite Eudarluca caricis and its evolutionary relationship to Ampelomyces.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki