Phytophthora pseudosyringae

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Phytophthora pseudosyringae
Scientific classification
(unranked): SAR
Superphylum: Heterokonta
Class: Oomycetes
Order: Pythiales
Family: Pythiaceae
Genus: Phytophthora
Species: P. pseudosyringae
Binomial name
Phytophthora pseudosyringae
T. Jung and T.I. Burgess, 2009

Phytophthora pseudosyringae is a semi-papillate homothallic soil-borne plant pathogen causing root and collar rot of deciduous tree species in Europe.[1] It is associated with necrotic fine roots and stem necroses of Fagus sylvatica and Alnus glutinosa, and isolates are moderately aggressive to fine roots of oaks and beech (Nothofagus[2]), highly aggressive to holly leaves and apple fruits, and slightly pathogenic to alder bark. It belongs to the class of oomycetes and is often described as a ‘fungal-like’ organism since they form a heterotrophic mycelium as the ‘true fungi’, but in contrast, their cell wall lacks chitin and is composed only of cellulose and glucans.

Its name derives from Greek Phytophthora φυτόν (phytón), “plant” and φθορά (phthorá), “destruction”; “the plant-destroyer” and plurivora and from Latin (pluri = many, -vora = feeding).


  1. ^ Jung, Thomas; Nechwatal, Jan; Cooke, David E.L.; Hartmann, Günther; Blaschke, Markus; Oßwald, Wolfgang F.; Duncan, James M.; Delatour, Claude (2003). "Phytophthora pseudosyringae sp. nov., a new species causing root and collar rot of deciduous tree species in Europe". Mycological Research. 107 (7): 772–789. ISSN 0953-7562. doi:10.1017/S0953756203008074. 
  2. ^ Scanu, B.; Jones, B.; Webber, J.F. (2012). "A new disease ofNothofagusin Britain caused byPhytophthora pseudosyringae". New Disease Reports. 25: 27. ISSN 2044-0588. doi:10.5197/j.2044-0588.2012.025.027. 

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