Name and publication
Phytophthora castanetorum Jung, Horta Hung, Bakonyi & Scanu (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
Etymology
referring to the association of this species with forests of Castanea sativa (Castanetum is the phytosociological term for a chestnut forest.)
Typification
Type: PORTUGAL, Algarve: Monchique, isolated from rhizosphere soil of a mature Castanea sativa tree, March 2015, T. Jung (CBS H-22983, holotype, dried culture on V8A)
Ex-type: CBS 142299 = BD 292
Sequences for ex-type: Phytophthora castanetorum isolate BD292 = ITS MF036182 and cox1 MF036266
Ex-type in other collections
CBS 142299 = BD 292
Molecular identification
Voucher sequences for barcoding genes (ITS rDNA and COI) of the ex-type (see Molecular protocols page)
Phytophthora castanetorum isolate BD292 ITS rDNA MF036182
Sequences for ex-type in other sources
- NCBI: Phytophthora castanetorum BD292
- Phytophthora DATABASE: Phytophthora castanetorum
- EPPO-Q-bank: Phytophthora castanetorum
- BOLDSYSTEMS: Phytophthora castanetorum
Position in ITS phylogenetic tree
Clade 3b
Morphological identification
adapted from Jung et al. (2017)
Colonies and cardinal temperatures
Colonies on V8-A, PDA, and MEA with uniform shape. Optimum growth temperature 25°C, maximum 30°C.
Conditions for growth and sporulation
Sporangia commonly observed in solid agar of older cultures and produced abundantly in nonsterile soil extract. Gametangia readily produced in single culture by all isolates on V8A within 7–10 days.
Asexual phase
Sporangia semipapillate or nonpapillate; persistent; often forming a conspicuous basal plug that protrudes into the empty sporangium; ovoid, subglobose to globose, obpyriform, ellipsoid, or distorted (44.2–48.1 × 35.4–38.3 μm); originated on unbranched sporangiophores or in irregular lax or regular dense sympodia. Hyphal swellings small subglobose to limoniform, sometimes formed close to the sporangial base, sometimes catenulate, and often with individual or radiating hyphal extensions. Chlamydospores globose.
Sexual phase
Homothallic. Oogonia smooth-walled, elongated pyriform to ellipsoid (24.5–41.5 μm); antheridia almost exclusively paragynous and club-shaped to subglobose; oopores plerotic or aplerotic, thick-walled.
Hosts and distribution
Distribution: Europe (Italy, Portugal)
Substrate: rhizosphere soil
Disease note: pathogenic to roots in pathogenicity tests
Hosts: Castanea sativa (Fagaceae)
Retrieved January 29, 2018 from U.S. National Fungus Collections Nomenclature Database.
Additional references and links
- Phytophthora DATABASE: Phytophthora castanetorum
- EPPO-Q-bank: Phytophthora castanetorum
- SMML USDA-ARS: Phytophthora castanetorum
- EPPO Global Database: Phytophthora castanetorum
- CABI Invasive Species Compendium: Phytophthora castanetorum
- Encyclopedia of Life (EOL): Phytophthora castanetorum
- Index Fungorum (IF): Phytophthora castanetorum
- Plantwise Knowledge Bank: Phytophthora castanetorum
- Google All Phytophthora castanetorum
- Google Images Phytophthora castanetorum
- Google Scholar Phytophthora castanetorum
Fact sheet author
Z. Gloria Abad, Ph.D., USDA-APHIS-PPQ-S&T Beltsville Laboratory, United States of America