Name and publication
Phytophthora psychrophila 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: firstname.lastname@example.org
from Jung et al. (2002)
refers to the low temperature growth attributes of the species
Type: GERMANY, isolated from the rhizosphere on decaying oak (Quercus robur) by Thomas Jung, LMU, in Rosenheim (Bavaria - Schechen, Südbayern), during May 1995 (IFB-Mühl1/2) Institute of Forest Botany / Forest Pathology, Technische Universität München, Germany
Ex-type: CBS 803.95 and IFB-PSY 1 (living cultures)
Sequences for ex-type in original manuscript: CBS 805.95: ITS rDNA AF449494
Note: Table 1 in Jung et al. (2002) indicates PSY 1 sequence, however NCBI AF449494 refers to isolate PSY 2 which is from Nime, France, 1996.
Ex-type in other collections
Voucher sequences for barcoding genes (ITS rDNA and COI) of the ex-type (see Molecular protocols page)
Sequences for ex-type in other sources
- NCBI: Phytophthora psychrophila CPHST BL 52
- NCBI: Phytophthora psychrophila P10433
- NCBI: Phytophthora psychrophila CBS 80395
- Phytophthora Database: Phytophthora psychrophila PD_00039 (= P10433 WPC) information for up to 13 genes
- EPPO-Q-bank: Phytophthora psychrophila CBS 80395 = IFB-PSY 1 = P10433 ITSrDNA, TUB, COI, TEF
- BOLDSYSTEMS: Phytophthora psychrophila (barcoding COI & ITS)
Position in ITS phylogenetic tree
adapted from Jung et al. (2002)
Colonies and cardinal temperatures
Colony morphology on PDA and MEA with non-distinctive pattern. No growth on V-8 agar. Minimum growth temperature 3°C, optimum 15°C, and maximum 21°C.
Conditions for growth and sporulation
Chlamydospores produced in water cultures.
Sporangia semipapillate with some bipapillated; persistent and sometimes caducous with short and medium pedicels; ellipsoid, ovoid, obpyriform (22–51 L x 18–34 W µm) originated in unbranched and simple sympodial sporangiophores. Hyphal swellings absent. Chlamydospores globose, terminal and intercalary.
Homothallic. Oogonia smooth-walled; spherical to slightly globose (32–47µm diam); antheridia amphigynous, ovoid, elongate, short cylindrical, sometimes with digitate projections; oospores plerotic, aplerotic, and slightly aplerotic (24–33 µm diam). Oospores showing thick walls are frequently observed.
Most typical characters
Additional specimen(s) evaluated
Phytophthora psychrophila ex-type CPHST BL 52, duplicate of P10433 (World Phytophthora Collection)
Hosts and distribution
Distribution: Europe (France, Germany, UK)
Substrate: soil (rhizosphere)
Disease note: only weakly pathogenic in soil infestation tests, but capable of producing necrotic bark lesions on suberized tap roots of Quercus robur seedlings (Jung et al. 2002)
Host: infects Ilex aquifolium and Quercus spp. in inoculation tests
Retrieved February 01, 2018 from U.S. National Fungus Collections Nomenclature Database.
Additional references and links
- Phytophthora DATABASE: Phytophthora psychrophila
- EPPO-Q-bank: Phytophthora psychrophila
- SMML USDA-ARS: Phytophthora psychrophila
- EPPO Global Database: Phytophthora psychrophila
- Forest Phytophthoras of the world: Phytophthora psychrophila
- CABI Invasive Species Compendium: Phytophthora psychrophila
- Encyclopedia of Life (EOL): Phytophthora psychrophila
- Index Fungorum (IF): Phytophthora psychrophila
- Plantwise Knowledge Bank: Phytophthora psychrophila
- Google All Phytophthora psychrophila
- Google Images Phytophthora psychrophila
- Google Scholar Phytophthora psychrophila
Fact sheet author
Z. Gloria Abad, Ph.D., USDA-APHIS-PPQ-S&T Beltsville Laboratory, United States of America