Phytophthora uliginosa

Name and publication

Phytophthora uliginosa Jung & Hansen (2002)

Jung T, Hansen EM, Winton L, Osswald W, and Delatour C. 2002. Three new species of Phytophthora from European oak forests. Mycological Research 106: 397–411.

Corresponding author:





refers to the species' habitat in poorly drained soils


Type: POLAND, collected from the rhizosphere of oak (Quercus robur), by Thomas Jung in Niepolomice, May 1998; type: IFB-ULI 1-Niep 8 deposited at the Institute of Forest Botany / Forest Pathology, Technische Universität München, Germany

Ex-type: CBS 109054

Sequences for ex-type in original manuscript: IFB-ULI 1 = AF449495 ITS rDNA

Ex-type in other collections

CBS 109054 = P10413 (WOC/WPC), CPHST BL 59 (Abad), Niep No8, IFB-ULI 1, 62A3 (Yang)

Molecular identification

Voucher sequences for barcoding genes (ITS rDNA and COI) of the ex-type (see Molecular protocols page)

Phytophthora uliginosa isolate CPHST BL 59 (= P10413 WPC) = ITS rDNA MG865597, COI MH136988

Sequences for ex-type in other sources
Position in ITS phylogenetic tree

Clade 7a

Morphological identification

adapted from Jung et al. (2002)

Colonies and cardinal temperatures

Colony morphology on CMA, V8A, and MEA is uniform without any growth pattern, and with almost no growth on PDA. Optimum temperature 18°C, maximum 29°C.

Asexual phase

Sporangia nonpapillate; persistent; broad-ellipsoid or obpyriform, sometimes with an undulating wall or a conspicuous basal plug (av. 43–55 µm length x 26–34 µm width); showing external, internal, or nested proliferation; formed on loosely branched sporangiophores. Hyphal swellings irregular, common, and produced in clusters. Chlamydospores absent.

Sexual phase

Homothallic. Oogonia smooth-walled (42–46 µm diam); antheridia paragynous, and attached near the stalk; oospores plerotic and aplerotic (38–40 µm diam.).

​Additional specimen(s) evaluated

Phytophthora uliginosa ex-type CPHST BL 59, duplicate of P10413 (World Phytophthora Collection)

Hosts and distribution

Distribution: Europe (Poland, Germany)
Substrate: soil (rhizosphere)
Disease Note: aggressive root rot and dieback of oaks; associated with oak decline
Host: Quercus robur, Quercus petraea (Fagaceae)

Retrieved February 01, 2018 from U.S. National Fungus Collections Nomenclature Database.

Additional references and links

Fact sheet author

Z. Gloria Abad, Ph.D., USDA-APHIS-PPQ-S&T Beltsville Laboratory, United States of America