Publikation:

Pythium phragmitis sp. nov., a new species close to P. arrhenomanes as a pathogen of common reed (Phragmites australis)

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201_Pythium_phragmitis.pdf
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2005

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Wielgoss, Anna Marina

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http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-37611
DOI (zitierfähiger Link)
https://doi.org/10.1017/S0953756205003990
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Attribution-NonCommercial-NoDerivs 2.0 Generic

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Open Access Green

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Biologie: Publikationen
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Published

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Mycological Research. 2005, 109(12), pp. 1337-1346. ISSN 0953-7562. Available under: doi: 10.1017/S0953756205003990

Zusammenfassung

During a study on the occurrence and pathogenicity of oomycetes in the reed-belt (Phragmites australis) of Lake Constance (Germany), a new Pythium resembling the important cereal pathogen species complex P. arrhenomanes/P. graminicola was consistently isolated from necrotic mature reed leaves and reed rhizosphere samples. The new species proved to be significantly more aggressive towards reed leaves and seedlings in vitro than related species. It is characterised by filamentous, inflated sporangia and plerotic oospores with usually more than one antheridium. ITS and cox II sequence data indicate this new species shares a common ancestor with P. arrhenomanes, but the sequence differences are clearly consistent with a divergence of the two taxa and with P. phragmitis being a distinct species. ITS 1 and 2 of 15 isolates of the taxon consistently differed from P. arrhenomanes by 13 positions. Sequence analyses of the cox II gene confirmed the new species phylogenetic position. This paper gives a formal description of the taxon as P. phragmitis sp. nov., providing information on morphology, ecology and pathogenicity in comparison to related species. As indicated by the close association to Phragmites australis, the high aggressiveness towards reed leaves and seedlings, and the abundance in the investigated stands, Pythium phragmitis might act as a reed pathogen of considerable importance, in particular under flooding situations.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
570 Biowissenschaften, Biologie

Schlagwörter

Pythium phragmitis, Phragmites australis

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ISO 690NECHWATAL, Jan, Anna Marina WIELGOSS, Kurt MENDGEN, 2005. Pythium phragmitis sp. nov., a new species close to P. arrhenomanes as a pathogen of common reed (Phragmites australis). In: Mycological Research. 2005, 109(12), pp. 1337-1346. ISSN 0953-7562. Available under: doi: 10.1017/S0953756205003990
BibTex
@article{Nechwatal2005Pythi-6824,
  year={2005},
  doi={10.1017/S0953756205003990},
  title={Pythium phragmitis sp. nov., a new species close to P. arrhenomanes as a pathogen of common reed (Phragmites australis)},
  number={12},
  volume={109},
  issn={0953-7562},
  journal={Mycological Research},
  pages={1337--1346},
  author={Nechwatal, Jan and Wielgoss, Anna Marina and Mendgen, Kurt}
}
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    <dcterms:abstract xml:lang="eng">During a study on the occurrence and pathogenicity of oomycetes in the reed-belt (Phragmites australis) of Lake Constance (Germany), a new Pythium resembling the important cereal pathogen species complex P. arrhenomanes/P. graminicola was consistently isolated from necrotic mature reed leaves and reed rhizosphere samples. The new species proved to be significantly more aggressive towards reed leaves and seedlings in vitro than related species. It is characterised by filamentous, inflated sporangia and plerotic oospores with usually more than one antheridium. ITS and cox II sequence data indicate this new species shares a common ancestor with P. arrhenomanes, but the sequence differences are clearly consistent with a divergence of the two taxa and with P. phragmitis being a distinct species. ITS 1 and 2 of 15 isolates of the taxon consistently differed from P. arrhenomanes by 13 positions. Sequence analyses of the cox II gene confirmed the new species  phylogenetic position. This paper gives a formal description of the taxon as P. phragmitis sp. nov., providing information on morphology, ecology and pathogenicity in comparison to related species. As indicated by the close association to Phragmites australis, the high aggressiveness towards reed leaves and seedlings, and the abundance in the investigated stands, Pythium phragmitis might act as a reed pathogen of considerable importance, in particular under flooding situations.</dcterms:abstract>
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