Journal
PROTIST
Volume 168, Issue 4, Pages 468-480Publisher
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.protis.2017.07.001
Keywords
plasmodiophorids; brown algae; galls; rDNA; resting spores
Categories
Funding
- Conicyt (BecasChile) [72130422]
- NERC IOF Pump-priming [NE/L013223/1]
- Gobierno Regional de Los Lagos [FIC 2012 E7259-2, FIC 2013 BIP30234872-0]
- Austrian Science Fund (FWF) [J3175-B20, Y801-B16]
- UoA
- BBSRC
- NERC
- Scottish Funding Council [HR09011]
- Shackleton Fund (FCK)
- John Cheek Fund (FCK)
- Austrian Science Fund (FWF) [Y801, J3175] Funding Source: Austrian Science Fund (FWF)
- BBSRC [BB/M026566/1, BB/P020224/1] Funding Source: UKRI
- Austrian Science Fund (FWF) [Y 801, J 3175] Funding Source: researchfish
- Biotechnology and Biological Sciences Research Council [BB/M026566/1, BB/P020224/1] Funding Source: researchfish
- Natural Environment Research Council [1093492] Funding Source: researchfish
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Phytomyxea are obligate endoparasites of angiosperm plants and Stramenopiles characterised by a complex life cycle. Here Maullinia braseltonii sp. nov., an obligate parasite infecting the bull kelp Durvillaea (Phaeophyceae, Fucales) from the South-Eastern Pacific (Central Chile and Chiloe Island) and South-Western Atlantic (Falkland Islands, UK) is described. M. braseltonii causes distinct hypertrophies (galls) on the host thalli making it easily identifiable in the field. Sequence comparisons based on the partial 18S and the partial 18S-5.8S-28S regions confirmed its placement within the order Phagomyxida (Phytomyxea, Rhizaria), as a sister species of the marine parasite Maullinia ectocarpii, which is also a parasite of brown algae. The development of resting spores in M. braseltonii is described by light and electron microscopy and confirmed by FISH experiments, which visually showed the differential expression of the 28S non-coding gene, strongly in early plasmodia and weakly in late cysts. M. braseltonii is, so far, the only phytomyxean parasite of brown algae for which the formation of resting spores has been reported, and which is widely distributed in Durvillaea stocks from the Southeastern Pacific and (C) 2017 The Authors. Published by Elsevier GmbH.
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