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 N.; Küpper, Frithjof C.

doi:10.3354/dao02583

Cited by 19 publications

(12 citation statements)

References 46 publications

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“…Fragments of all specimens were kept in silica gel or CTAB buffer (Phillips et al 2001), both of which conserve DNA for further molecular studies. Filamentous brown algae were surveyed for eukaryotic pathogens as described previously (Küpper and Müller 1999;Strittmatter et al 2013).…”

Section: Methodsmentioning

confidence: 99%

Seaweed biodiversity in the south-western Antarctic Peninsula: surveying macroalgal community composition in the Adelaide Island/Marguerite Bay region over a 35-year time span

Mystikou

Peters²,

Asensi³

et al. 2014

Polar Biol

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Section: Methodsmentioning

confidence: 99%

Seaweed biodiversity in the south-western Antarctic Peninsula: surveying macroalgal community composition in the Adelaide Island/Marguerite Bay region over a 35-year time span

Mystikou

Peters²,

Asensi³

et al. 2014

Polar Biol

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“…; Strittmatter et al . , ). It is an intracellular pathogen for most of its life cycle, and in contrast to eucarpic counterparts, infects single algal cells (Fig.…”

Section: Introductionmentioning

confidence: 99%

Infection of the brown alga Ectocarpus siliculosus by the oomycete Eurychasma dicksonii induces oxidative stress and halogen metabolism

Strittmatter

Grenville‐Briggs

Breithut

et al. 2015

Plant Cell & Environment

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Pathogens are increasingly being recognized as key evolutionary and ecological drivers in marine ecosystems. Defence mechanisms of seaweeds, however, have mostly been investigated by mimicking infection using elicitors. We have established an experimental pathosystem between the genome brown model seaweed E ctocarpus siliculosus and the oomycete E urychasma dicksonii as a powerful new tool to investigate algal responses to infection. Using proteomics, we identified 21 algal proteins differentially accumulated in response to E u. dicksonii infection. These include classical algal stress response proteins such as a manganese superoxide dismutase, heat shock proteins 70 and a vanadium bromoperoxidase. Transcriptional profiling by qPCR confirmed the induction of the latter during infection. The accumulation of hydrogen peroxide was observed at different infection stages via histochemical staining. Inhibitor studies confirmed that the main source of hydrogen peroxide is superoxide converted by superoxide dismutase. Our data give an unprecedented global overview of brown algal responses to pathogen infection, and highlight the importance of oxidative stress and halogen metabolism in these interactions. This suggests overlapping defence pathways with herbivores and abiotic stresses. We also identify previously unreported actors, in particular a Rad23 and a plastid–lipid‐associated protein, providing novel insights into the infection and defence processes in brown algae.

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“…During the expedition in January- This pathogen had so far only been observed at its type locality in North Carolina (Karling 1943, Johnson 1957 and, 2 years after the records reported here, in Greece in 2009 (Strittmatter et al 2013). Eurychasma is the most basal genus of the oomycete lineage (Küpper et al 2006) while the phylogenetic affinity of A. ectocarpii remains unresolved.…”

Section: Eukaryotic Pathogensmentioning

confidence: 75%

New records and observations of macroalgae and associated pathogens from the Falkland Islands, Patagonia and Tierra del Fuego

Mystikou¹,

Asensi²,

Clerck

et al. 2016

Botanica Marina

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

Cited by 19 publications

References 46 publications

Seaweed biodiversity in the south-western Antarctic Peninsula: surveying macroalgal community composition in the Adelaide Island/Marguerite Bay region over a 35-year time span

Seaweed biodiversity in the south-western Antarctic Peninsula: surveying macroalgal community composition in the Adelaide Island/Marguerite Bay region over a 35-year time span

Infection of the brown alga Ectocarpus siliculosus by the oomycete Eurychasma dicksonii induces oxidative stress and halogen metabolism

New records and observations of macroalgae and associated pathogens from the Falkland Islands, Patagonia and Tierra del Fuego

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