Phytophthora gallica

Name and publication

Phytophthora gallica Jung & Nechwatal (2008)

Jung T and Nechwatal J. 2008. Phytophthora gallica sp. nov., a new species from rhizosphere soil of declining oak and reed stands in France and Germany. Mycol. Res. 112: 1195–1205 (pg. 1200).

Corresponding author: Thomas Jung competence@tree-diseases.com

Nomenclature

from Jung and Nechwatal (2008)

Mycobank

MB497405

Etymology

refers to the origin of isolate GAL 1 in France

Typification

Type: FRANCE, Forêt d’ Illwald, from oak rhizosphere soil (Quercus robur), Apr 1998, T. Jung, PRC-Ill 5/1 (Phytophthora Research and Consultancy, Brannenburg, Germany)

Isotype: UKN-Ill 5/1 (University of Konstanz, Germany, Phytopathology). Previously known informally as Phytophthora taxon G.

Ex-type: CBS 111474 and PRC-GAL 1 (Live cutures) GAL1, MM497405

Sequences for ex-type in original manuscript: GAL-1 = ITS rDNA DQ286726, CoxII EF192238

Ex-type in other collections

CBS 111474 and PRC-GAL 1 = P16826 (WOC/WPC), CPHST BL 35 (Abad), MM497405, 50A1 (Yang)

Molecular identification

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

Phytophthora gallica isolate CPHST BL 35 (= P16826 WPC) = ITS rDNA MG865497, COI MH136893

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

Clade 10b

Morphological identification

adapted from Jung and Nechwatal (2008)

Colonies and cardinal temperatures

Colony morphology after 7 days on V8-A, PDA, and MEA with no distinct pattern, in V-8 and MEA with light chrysanthemum pattern. Minimum growth temperature 5°C, optimum 20°C, and maximum 30°C.

Asexual phase

Sporangia nonpapillate; persistent; obpyriform, ovoid, peanut-like, or limoniform (30–100 x 19–47 µm); with internal extended or nested proliferation; originated on unbranched or lax sympodia sporangiophores. Hyphal swellings globose, subglobose, irregular, and catenulated. Chlamydospores globose (25–63 µm), elongated, pyriform, club-shaped and irregular, terminal, or lateral.

Sexual phase

Sterile.

Most typical characters

Phytophthora gallica is characterized by the presence of hyphal swellings globose, subglobose, irregular, and catenulated; the globose, elongated, pyriform, club-shaped chlamydospores; and the sterile sexual phase.

Additional specimen(s) evaluated

Phytophthora gallica ex-type CPHST BL 35, duplicate of P16826 (World Phytophthora Collection), which is a duplicate of the ex-type CBS 111474

Hosts and distribution

Distribution: Europe, North America (USA: OR)
Substrate: soil
Host: associated with diverse hosts

Retrieved January 30, 2018 from U.S. National Fungus Collections Nomenclature Database.

Additional info:
Host: Quercus robur 
Substrate: rhizosphere

Additional references and links

Fact sheet author

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