Phytophthora tubulina

Name and publication

Phytophthora tubulina Jung, Cech, Horta Hung & Bakonyi (2017)

Jung T, Horta Jung M, Cacciola SO, Cech T, Bakonyi J, Seress D, Mosca S, Schena L, Seddaiu S, Pane A, Magnano di San Lio G, Maia C, Cravador A, Franceschini A, and Scanu B. 2017. Multiple new cryptic pathogenic Phytophthora species from Fagaceae forests in Austria, Italy, and Portugal. IMA Fungus 8 (2): 219–244.

Corresponding author e-mail: bscanu@uniss.it

Nomenclature

from Jung et al. (2017)

Mycobank

MB819701

Etymology

refers to the tubular shape of many oogonia (tubulina Lat., tubular)

Typification

Type: AUSTRIA, Lower Austria; Dunkelsteiner Forst, isolated from rhizosphere soil of a mature Fagus sylvatica tree, Sept. 2010, T. Jung (CBS H-22557–holotype, dried culture on V8A)

Ex-type: CBS 141212 = TUB1

Sequences for ex-type in original manuscript: Phytophthora tubulina isolate TUB1 = ITS rDNA MF036196, cox1 MF036277

Molecular identification

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

Phytophthora tubulina isolate TUB1 = ITS rDNA MF036196

Sequences for ex-type in other sources
  • NCBI: Phytophthora tubulina TUB1
  • Phytophthora DATABASE: Phytophthora tubulina 
  • EPPO-Q-bank: Phytophthora tubulina 
  • BOLDSYSTEMS: Phytophthora tubulina 
Position in ITS phylogenetic tree

Clade 3b

Morphological identification

adapted from Jung et al. (2017)

Colonies and cardinal temperatures

Colony morphology on PDA, V8A, MEA with nondistinctive pattern. The optimum temperature is 25°C and maximum 30°C.

Conditions for growth and sporulation

Sporangia infrequently observed in solid agar, abundantly produced in nonsterile soil extract; gametangia readily produced in single culture on V8A within 10 days.

Asexual phase

Sporangia nonpapillate, sometimes bipapillate or tripapillate; persistent sometimes caducous; ovoid, elongated, obpyriform, limoniform, subglobose, ellipsoid (29.5–98.5 μm length x 19.0–59.0 μm width); originated on unbranched sporangiophores, in lax sympodia, on short lateral sporangiophores, or intercalary. Hyphal swellings subglobose to limoniform, often catenulate and with radiating hyphae, infrequently produced on sporangiophores. Chlamydospores absent.

Sexual phase

Homothallic. Oogonia with smooth walls and with tapering base, globose to subglobose, elongated to tubular, or eccentric (16.5–42.5 μm diam.); antheridia paragynous, subglobose to club-shaped; oospores plerotic or aplerotic, usually globose, less frequently elongated, some oogonia with two oospores of which one is usually aborted.

Hosts and distribution

Distribution: Europe (Austria)
Substrate: rhizosphere soil
Disease note: pathogenic to roots in pathogenicity tests
Host: Fagus sylvatica (Fagaceae)

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

Additional references and links

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

Fact sheet author

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