Phytophthora terminalis

Name and publication

Phytophthora terminalis Man in ’t Veld and Rosendahl (2015)

Man In 't Veld WA, Rosendahl KC, van Rijswick PC, Meffert JP, Westenberg M, van de Vossenberg BT, Denton G, and van Kuik FA. 2015. Phytophthora terminalis sp. nov. and Phytophthora occultans sp. nov., two invasive pathogens of ornamental plants in Europe. Mycologia 107: 54–65.

Corresponding author: w.a.man.in.t.veld@minlnv.nl

Nomenclature

from Man In 't Veld et al. (2015)

Mycobank

MB803536

Etymology

terminalis (L), matching the epithet of the main host Pachysandra terminalis, but also indicating that after infection the plant can write its ‘‘last will’’

Typification

Type: NETHERLANDS, isolated from root and stem base rot of Pachysandra terminalis, 2010, Karin Rosendahl (holotype CBS 133865, dried culture in herb. CBS)

Ex-type: CBS 133865

Sequences for ex-type in original manuscript: PD4885512-1 = ITS JX978167, CoxI JX978168, β-tub JX978169, TEF1a KF650774

Ex-type in other collections

CBS 133865 = P19956 (WOC/WPC), CPHST BL 164 (Abad), 65B8 (Hong)

Molecular identification

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

Phytophthora terminalis isolate CPHST BL 164 (= P19956 WPC) = ITS rDNA MG865592, COI MH136984

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

Clade 2a

Morphological identification

adapted from Man In 't Veld et al. (2015)

Colonies and cardinal temperatures

Colony after 7 days of growth on V8-A, PDA, and MEA with no distinctive pattern. Minimum growth temperature 10°C, optimum 24°C, and maximum 28°C.

Asexual phase

Sporangia semipapillate, rarely bipapillate; caducous with medium pedicel length (7–22 µm L), and persistent; ovoid, obpyriform, sometimes mouse-shaped (27–38 L µm); originated in simple sympodial sporangiophores. Hyphal swellings absent. Chlamydospores absent.

Sexual phase

Homothallic. Oogonia globose (31–35 µm diam.), antheridia predominantly paragynous; oospores aplerotic, rarely plerotic (26–31 µm diam.).

Most typical characters

Phytophthora terminalis is characterized by the presence of sporangia semipapillate and caducous with medium pedicel, and the absence of chlamydospores and hyphal swellings combined with the characters of the sexual phase.

Additional specimen(s) evaluated

Phytophthora terminalis ex-type CPHST BL 164, duplicate of P19956 (World Phytophthora Collection), which is a duplicate of the ex-type CBS 133865

Hosts and distribution

Distribution: Europe (Belgium, Netherlands)
Substrate: roots, stem base
Disease note: root and stem base rot
Host: Pachysandra terminalis (Buxaceae)

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

Additional references and links

  • Phytophthora DATABASE: Phytophthora terminalis
  • EPPO-Q-bank: Phytophthora terminalis
  • SMML USDA-ARS: Phytophthora terminalis
  • EPPO Global Database: Phytophthora terminalis
  • CABI Invasive Species Compendium: Phytophthora terminalis
  • Encyclopedia of Life (EOL): Phytophthora terminalis
  • Index Fungorum (IF): Phytophthora terminalis
  • Plantwise Knowledge Bank: Phytophthora terminalis

Fact sheet author

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