Name and publication
Phytophthora austrocedri Greslebin & Hansen (2007)
Greslebin AG, Hansen EM, and Sutton W. 2007. Phytophthora austrocedrae sp. nov., a new species associated with Austrocedrus chilensis mortality in Patagonia (Argentina). Mycol. Res. 111: 308–316.
Corresponding author: firstname.lastname@example.org
from Greslebin et al. (2007)
≡ Phytophthora austrocedrae Gresl. & E.M. Hansen (2007) [MB#510267] (orthographic variant)
refers to the host Austrocedrus chilensis
Type: ARGENTINA, from roots and stem of Austrocedrus chilensis (Ciprés de la Cordillera or Cordilleran Cypress) collected on Oct. 2005 by A. Greslebin in Chubut, Parque Nacional Los Alerces (CIEFAP 203, Centro de Investigacion y Extension Forestal Andino Patagonico)
Ex-type: culture ATCC MYA-4074 (AG203)
Sequences for ex-type in original manuscript: Phytophthora sp. austrocedrae isolate AG203 = ITS rDNA: DQ995184 (1194bp 18S + ITS)
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 austrocedri CPHST BL 5
- NCBI: Phytophthora austrocedri AG203 (PAU-09-002)
- NCBI: Phytophthora austrocedri P16040
- Phytophthora DATABASE: Phytophthora austrocedri PD_01919 (= P16040 = CIEFAP203 = MYA-4074), PD-01648 (= MYA-4074)
- EPPO-Q-bank: Phytophthora austrocedri CBS 122.911
- BOLDSYSTEMS: Phytophthora austrocedri PHYTO117-10 = P16040 (barcoding COI & ITS)
Position in ITS phylogenetic tree
adapted from Greslebin et al. (2007)
Colonies and cardinal temperatures
Colonies in CMA, V8, and PDA are uniform with non-distinctive pattern and with slow growth. Minimum temperature is 3°C, optimum 15–21°C, and maximum 24°C.
Conditions for growth and sporulation
Sporangia are produced in water cultures (soil extract or river water) and not observed in solid media. Oogonia are formed in single-strain culture in different media including CMA, V8-A, PDA, and HS with oil. Oogonia were usually formed in selective media after about 20 d.
Sporangia semipapillate; persistent; ovoid, obpyriform, limoniform, or ellipsoid frequently with distorted shapes with average size of 50 x 36 µm (22–83 µm x 15–58 µm), and produced in unbranched sporangiophores. Sporangiophores frequently have hyphal swellings. Sporangia with hyphal projections and lateral attachment of the sporangiophore are frequently observed. Hyphal swellings are usually formed in liquid and solid media and are globose to subglobose, catenulated and sometimes with distorted shapes. Chlamydospores absent.
Most typical characters
Additional specimen(s) evaluated
Phytophthora austrocedrae CPHST BL 5 (Abad) = (P16040 World Phytophthora Collection – California, USA) duplicate of the ex-type CIEFAP 203
Hosts and distribution
Distribution: Asia (Iran), Europe (England, Germany, Scotland), South America (Argentina)
Substrate: isolated from necrotic lesions of stems and roots
Disease note: dieback, mortality; associated with 'mal del cipres' disease
Host: Austrocedrus chilensis, Juniperus communis, Cupressus sempervirens (Cupressaceae)
Retrieved January 17, 2018 from U.S. National Fungus Collections Nomenclature Database.
Additional information: The natural host of P. austrocedrae in South America is the Chilean cedar (Austrocedrus chilensis). In the UK, Lawson cypress (Chamaecyparis lawsoniana), Nootka cypress (Chamaecyparis nootkatensis), and the common juniper (Juniperus communis) have been confirmed as hosts in 2011. https://www.forestresearch.gov.uk/research/phytophthora-austrocedri/
USA: Phytophthora austrocedrae is listed in the “Additional Pests of Concern” by the National Cooperative Agricultural Pest Survey (CAPS) for 2017, 2018, and 2019.
This species was listed as a species of concern during the 2009 Phytophthora prioritization project conducted by USDA APHIS PPQ CPHST PERAL (Schwartzburg et al.).
Additional references and links
- Phytophthora DATABASE: Phytophthora austrocedri
- Q-bank: Phytophthora austrocedri
- SMML USDA-ARS: Phytophthora austrocedri
- EPPO Global Database: Phytophthora austrocedri
- Forest Phytophthoras of the world: Phytophthora austrocedrae
- Forest Research UK: Phytophthora austrocedri
- CABI Invasive Species Compendium: Phytophthora austrocedrae
- Encyclopedia of Life (EOL): Phytophthora austrocedrae
- Index Fungorum (IF): Phytophthora austrocedri
- Plantwise Knowledge Bank: Phytophthora austrocedri
- Google All Phytophthora austrocedrae
- Google Images Phytophthora austrocedrae
- Google Scholar Phytophthora austrocedrae
Fact sheet author
Z. Gloria Abad, Ph.D., USDA-APHIS-PPQ-S&T Beltsville Laboratory, United States of America