Pythium polare, a new heterothallic oomycete causing brown discolouration of Sanionia uncinata in the Arctic and Antarctic

Motoaki Tojo*, Pieter Van West, Tamotsu Hoshino, Kenichi Kida, Hirokazu Fujii, Akiho Hakoda, Yuki Kawaguchi, Hermann A. Mühlhauser, Albert H. Van Den Berg, Frithjof C. Küpper, María L. Herrero, Sonja S. Klemsdal, Anne Marte Tronsmo, Hiroshi Kanda

*Corresponding author for this work

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Pythium polare sp. nov. is a new heterothallic oomycete species isolated from fresh water and moss from various locations in both the Arctic and Antarctic. This water mould is able to infect stems and leaves of Sanionia moss (Sanionia uncinata). Pythium polare causes brown discolouration in in vitro inoculation tests at 5 °C after 5 weeks of inoculation. It is characterized by globose sporangia with various lengths of discharge tubes releasing zoospores and aplerotic oospores with usually one to five antheridia. The sexual structures are only produced in a dual culture of antheridial and oogonial isolates. Phylogenetic analysis, based on ITS sequencing, places all isolated strains of P. polare in a unique new clade, hence it is considered a novel species. Pythium canariense and Pythium violae are the most closely related species of P. polare based both on morphology and the phylogenetic analysis.

Original languageEnglish
Pages (from-to)756-768
Number of pages13
JournalFungal Biology
Volume116
Issue number7
Early online date27 Apr 2012
DOIs
Publication statusPublished - Jul 2012

Fingerprint

Pythium
Oomycetes
discoloration
Arctic region
Bryophyta
moss
inoculation
phylogenetics
mosses and liverworts
Sporangia
oospores
sporangia
phylogeny
zoospores
Fresh Water
stem
molds (fungi)
water
Fungi
stems

Keywords

  • Bipolar distribution
  • Moss
  • Oomycete
  • Plant pathogen
  • Pythium polare
  • Sanionia uncinata

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Genetics
  • Plant Science
  • Infectious Diseases

Cite this

Pythium polare, a new heterothallic oomycete causing brown discolouration of Sanionia uncinata in the Arctic and Antarctic. / Tojo, Motoaki; Van West, Pieter; Hoshino, Tamotsu; Kida, Kenichi; Fujii, Hirokazu; Hakoda, Akiho; Kawaguchi, Yuki; Mühlhauser, Hermann A.; Van Den Berg, Albert H.; Küpper, Frithjof C.; Herrero, María L.; Klemsdal, Sonja S.; Tronsmo, Anne Marte; Kanda, Hiroshi.

In: Fungal Biology, Vol. 116, No. 7, 07.2012, p. 756-768.

Research output: Contribution to journalArticle

Tojo, M, Van West, P, Hoshino, T, Kida, K, Fujii, H, Hakoda, A, Kawaguchi, Y, Mühlhauser, HA, Van Den Berg, AH, Küpper, FC, Herrero, ML, Klemsdal, SS, Tronsmo, AM & Kanda, H 2012, 'Pythium polare, a new heterothallic oomycete causing brown discolouration of Sanionia uncinata in the Arctic and Antarctic', Fungal Biology, vol. 116, no. 7, pp. 756-768. https://doi.org/10.1016/j.funbio.2012.04.005
Tojo, Motoaki ; Van West, Pieter ; Hoshino, Tamotsu ; Kida, Kenichi ; Fujii, Hirokazu ; Hakoda, Akiho ; Kawaguchi, Yuki ; Mühlhauser, Hermann A. ; Van Den Berg, Albert H. ; Küpper, Frithjof C. ; Herrero, María L. ; Klemsdal, Sonja S. ; Tronsmo, Anne Marte ; Kanda, Hiroshi. / Pythium polare, a new heterothallic oomycete causing brown discolouration of Sanionia uncinata in the Arctic and Antarctic. In: Fungal Biology. 2012 ; Vol. 116, No. 7. pp. 756-768.
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abstract = "Pythium polare sp. nov. is a new heterothallic oomycete species isolated from fresh water and moss from various locations in both the Arctic and Antarctic. This water mould is able to infect stems and leaves of Sanionia moss (Sanionia uncinata). Pythium polare causes brown discolouration in in vitro inoculation tests at 5 °C after 5 weeks of inoculation. It is characterized by globose sporangia with various lengths of discharge tubes releasing zoospores and aplerotic oospores with usually one to five antheridia. The sexual structures are only produced in a dual culture of antheridial and oogonial isolates. Phylogenetic analysis, based on ITS sequencing, places all isolated strains of P. polare in a unique new clade, hence it is considered a novel species. Pythium canariense and Pythium violae are the most closely related species of P. polare based both on morphology and the phylogenetic analysis.",
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