Intracellular eukaryotic pathogens in brown macroalgae in the Eastern Mediterranean, including LSU rRNA data for the oomycete Eurychasma dicksonii 

Martina Strittmatter, Claire M M Gachon, Dieter G Müller, Julia Kleinteich, Svenja Heesch, Amerssa Tsirigoti, Christos Katsaros, Maria Kostopoulou, Frithjof Christian Kuepper

Research output: Contribution to journalArticle

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Abstract

For the Mediterranean Sea, and indeed most of the world's oceans, the biodiversity and biogeography of eukaryotic pathogens infecting marine macroalgae remains poorly known, yet their ecological impact is probably significant. Based on 2 sampling campaigns on the Greek island of Lesvos in 2009 and 1 in northern Greece in 2012, this study provides first records of 3 intracellular eukaryotic pathogens infecting filamentous brown algae at these locations: Eurychasma dicksonii, Anisolpidium sphacellarum, and A. ectocarpii. Field and microscopic observations of the 3 pathogens are complemented by the first E. dicksonii large subunit ribosomal RNA (LSU rRNA) gene sequence analyses of isolates from Lesvos and other parts of the world. The latter highlights the monophyly of E. dicksonii worldwide and confirms the basal position of this pathogen within the oomycete lineage (Peronosporomycotina). The results of this study strongly support the notion that the geographic distribution of the relatively few eukaryotic seaweed pathogens is probably much larger than previously thought and that many of the world's marine bioregions remain seriously undersampled and understudied in this respect.

Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalDiseases of Aquatic Organisms
Volume104
Issue number1
DOIs
Publication statusPublished - 29 Apr 2013

Fingerprint

Oomycetes
macroalgae
RNA
pathogen
ribosomal RNA
pathogens
filamentous alga
Phaeophyceae
brown alga
ecological impact
seaweed
biogeography
Mediterranean Sea
monophyly
Greece
geographical distribution
oceans
Eurychasma
biodiversity
nucleotide sequences

Keywords

  • animals
  • host-pathogen interactions
  • Mediterranean Sea
  • oomycetes
  • phaeophyta
  • phylogeny
  • RNA, Ribosomal
  • brown algae
  • pathogens
  • hypochytrids
  • infection
  • Eastern Mediterranean
  • LSU rRNA
  • SSU rRNA
  • cox2

Cite this

Intracellular eukaryotic pathogens in brown macroalgae in the Eastern Mediterranean, including LSU rRNA data for the oomycete Eurychasma dicksonii . / Strittmatter, Martina; Gachon, Claire M M; Müller, Dieter G; Kleinteich, Julia; Heesch, Svenja; Tsirigoti, Amerssa; Katsaros, Christos; Kostopoulou, Maria; Kuepper, Frithjof Christian.

In: Diseases of Aquatic Organisms, Vol. 104, No. 1, 29.04.2013, p. 1-11.

Research output: Contribution to journalArticle

Strittmatter, M, Gachon, CMM, Müller, DG, Kleinteich, J, Heesch, S, Tsirigoti, A, Katsaros, C, Kostopoulou, M & Kuepper, FC 2013, 'Intracellular eukaryotic pathogens in brown macroalgae in the Eastern Mediterranean, including LSU rRNA data for the oomycete Eurychasma dicksonii ', Diseases of Aquatic Organisms, vol. 104, no. 1, pp. 1-11. https://doi.org/10.3354/dao02583
Strittmatter, Martina ; Gachon, Claire M M ; Müller, Dieter G ; Kleinteich, Julia ; Heesch, Svenja ; Tsirigoti, Amerssa ; Katsaros, Christos ; Kostopoulou, Maria ; Kuepper, Frithjof Christian. / Intracellular eukaryotic pathogens in brown macroalgae in the Eastern Mediterranean, including LSU rRNA data for the oomycete Eurychasma dicksonii . In: Diseases of Aquatic Organisms. 2013 ; Vol. 104, No. 1. pp. 1-11.
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