Name and publication
Phytophthora sansomeana Hansen & Reeser (2009)
Hansen EM, Wilcox WF, Reeser PW, and Sutton W. 2009. Phytophthora rosacearum and P. sansomeana, new species segregated from the Phytophthora megasperma "complex". Mycologia 101: 129–135.
Corresponding author: email@example.com
from Hansen et al. (2009)
The name commemorates Dr Eva Sansome, whose astute cytological observations established the diploid nature of Phytophthora and other oomycetes.
Type: UNITED STATES OF AMERICA, collected from soybean in Indiana by Reeser, isolate OSU 1819B holotype in Herbarium OSC (dried culture)
Ex-type: ATCC MYA-4455
Sequences for ex-type in original manuscript: OSU 1819B = ITS rDNA EU925375
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 sansomeana CPHST BL 55
- Phytophthora Database: Phytophthora sansomeana
- EPPO-Q-bank: Phytophthora sansomeana CBS 117693 ITSrDNA, β-tub, TEF
- BOLDSYSTEMS: Phytophthora sansomeana (barcoding COI & ITS)
Position in ITS phylogenetic tree
adapted from Hansen et al. (2009)
Colonies and cardinal temperatures
Colony after 7 days of growth on potato dextrose agar, malt extract agar with slight chrysanthemum pattern, and in V8 agar with no distinct pattern. Minimum growth temperature 3°C, optimum 24–30°C, and maximum 33°C.
Conditions for growth and sporulation
Sporangia nonpapillate, persistent; ovoid, obpyriform, ellipsoid, obovoid (30–53 L x 19–40 W µm) some with distorted shapes and some with tapered bases; presenting internal proliferation, produced on long, unbranched or loosely sympodial sporangiophores. Hyphal swellings globose, subglobose, with radiating hyphae produced on clusters or catenulated. Chlamydospores absent.
Homothallic. Oogonia smooth-walled, globose (25–52 µm diam); antheridia small (6–24 L x 9–16 W µm) predominately amphigynous and sometimes with digitate projections; oospores globose (23–44µm diam) plerotic, aplerotic, or slightly aplerotic.
Additional specimen(s) evaluated
Hosts and distribution
Distribution: North America (USA), Asia (China)
Substrate: roots, collar
Disease note: root rot
Host: Glycine max (Fabaceae), various other hosts
Retrieved February 01, 2018 from U.S. National Fungus Collections Nomenclature Database.
Additional references and links
- Phytophthora DATABASE: Phytophthora sansomeana
- EPPO-Q-bank: Phytophthora sansomeana
- SMML USDA-ARS: Phytophthora sansomeana
- EPPO Global Database: Phytophthora sansomeana
- CABI Invasive Species Compendium: Phytophthora sansomeana
- Forest Phytophthoras of the world: Phytophthora sansomeana
- Encyclopedia of Life (EOL): Phytophthora sansomeana
- Index Fungorum (IF): Phytophthora sansomeana
- Plantwise Knowledge Bank: Phytophthora sansomeana
- Google All Phytophthora sansomeana
- Google Images Phytophthora sansomeana
- Google Scholar Phytophthora sansomeana
Fact sheet author
Z. Gloria Abad, Ph.D., USDA-APHIS-PPQ-S&T Beltsville Laboratory, United States of America