@ARTICLE{TreeBASE2Ref16832,
author = {Jan Nechwatal and Wolfgang F. Osswald},
title = {Pythium montanum sp. nov., a new species from a spruce stand in the Bavarian Alps.},
year = {2003},
keywords = {},
doi = {},
url = {},
pmid = {},
journal = {Mycological Progress},
volume = {2},
number = {},
pages = {},
abstract = {During a study on soilborne Pythiaceae in the Bavarian Alps, 3 isolates of a papillate Pythium species with aplerotic oospores were found in rhizosphere soil from a declining spruce stand. The isolates showed a unique combination of sporangial and gametangial characters, and could not be assigned to any known species of the genus. The isolates are characterised by a relatively low growth rate, internally proliferating sporangia and extremely variable, monoclinous, sessile or shortly stalked antheridia. Direct germination of sporangia frequently occurs in liquid culture. Internal transcribed spacer (ITS) regions of the ribosomal DNA show very low levels of similarity to those of all known species of Pythium. This paper describes the isolates as Pythium montanum sp. nov., gives details on its morphology and provides preliminary information on its pathogenicity. Additional molecular evidence for its status as a new species is also provided. Phylogenetic analyses with a set of Pythium spp. show that P. montanum groups in a clade together with P. vexans, a species whose taxonomical status still remains unclear, and that is considered a ?border species' between Pythium and Phytophthora.}
}
Citation for Study 979
Citation title:
"Pythium montanum sp. nov., a new species from a spruce stand in the Bavarian Alps.".
This study was previously identified under the legacy study ID S864
(Status: Published).
Citation
Nechwatal J., & Osswald W. 2003. Pythium montanum sp. nov., a new species from a spruce stand in the Bavarian Alps. Mycological Progress, 2.
Authors
Abstract
During a study on soilborne Pythiaceae in the Bavarian Alps, 3 isolates of a papillate Pythium species with aplerotic oospores were found in rhizosphere soil from a declining spruce stand. The isolates showed a unique combination of sporangial and gametangial characters, and could not be assigned to any known species of the genus. The isolates are characterised by a relatively low growth rate, internally proliferating sporangia and extremely variable, monoclinous, sessile or shortly stalked antheridia. Direct germination of sporangia frequently occurs in liquid culture. Internal transcribed spacer (ITS) regions of the ribosomal DNA show very low levels of similarity to those of all known species of Pythium. This paper describes the isolates as Pythium montanum sp. nov., gives details on its morphology and provides preliminary information on its pathogenicity. Additional molecular evidence for its status as a new species is also provided. Phylogenetic analyses with a set of Pythium spp. show that P. montanum groups in a clade together with P. vexans, a species whose taxonomical status still remains unclear, and that is considered a ?border species' between Pythium and Phytophthora.
About this resource
- Canonical resource URI:
http://purl.org/phylo/treebase/phylows/study/TB2:S979
- Other versions:
Nexus
NeXML
- Show BibTeX reference
@ARTICLE{TreeBASE2Ref16832,
author = {Jan Nechwatal and Wolfgang F. Osswald},
title = {Pythium montanum sp. nov., a new species from a spruce stand in the Bavarian Alps.},
year = {2003},
keywords = {},
doi = {},
url = {},
pmid = {},
journal = {Mycological Progress},
volume = {2},
number = {},
pages = {},
abstract = {During a study on soilborne Pythiaceae in the Bavarian Alps, 3 isolates of a papillate Pythium species with aplerotic oospores were found in rhizosphere soil from a declining spruce stand. The isolates showed a unique combination of sporangial and gametangial characters, and could not be assigned to any known species of the genus. The isolates are characterised by a relatively low growth rate, internally proliferating sporangia and extremely variable, monoclinous, sessile or shortly stalked antheridia. Direct germination of sporangia frequently occurs in liquid culture. Internal transcribed spacer (ITS) regions of the ribosomal DNA show very low levels of similarity to those of all known species of Pythium. This paper describes the isolates as Pythium montanum sp. nov., gives details on its morphology and provides preliminary information on its pathogenicity. Additional molecular evidence for its status as a new species is also provided. Phylogenetic analyses with a set of Pythium spp. show that P. montanum groups in a clade together with P. vexans, a species whose taxonomical status still remains unclear, and that is considered a ?border species' between Pythium and Phytophthora.}
}
- Show RIS reference
TY - JOUR
ID - 16832
AU - Nechwatal,Jan
AU - Osswald,Wolfgang F.
T1 - Pythium montanum sp. nov., a new species from a spruce stand in the Bavarian Alps.
PY - 2003
KW -
UR -
N2 - During a study on soilborne Pythiaceae in the Bavarian Alps, 3 isolates of a papillate Pythium species with aplerotic oospores were found in rhizosphere soil from a declining spruce stand. The isolates showed a unique combination of sporangial and gametangial characters, and could not be assigned to any known species of the genus. The isolates are characterised by a relatively low growth rate, internally proliferating sporangia and extremely variable, monoclinous, sessile or shortly stalked antheridia. Direct germination of sporangia frequently occurs in liquid culture. Internal transcribed spacer (ITS) regions of the ribosomal DNA show very low levels of similarity to those of all known species of Pythium. This paper describes the isolates as Pythium montanum sp. nov., gives details on its morphology and provides preliminary information on its pathogenicity. Additional molecular evidence for its status as a new species is also provided. Phylogenetic analyses with a set of Pythium spp. show that P. montanum groups in a clade together with P. vexans, a species whose taxonomical status still remains unclear, and that is considered a ?border species' between Pythium and Phytophthora.
L3 -
JF - Mycological Progress
VL - 2
IS -
ER -
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