Name and publication
Phytophthora aquimorbida Hong (2012)
Hong CX, Richardson PA, Hao W, Shimire SR, Kong P, Moorman GW, Lea-Cox JD, and Ross DS. 2012. Phytophthora aquimorbida sp. nov. and Phytophthora taxon ‘aquatilis’ recovered from irrigation reservoirs and a stream in Virginia, USA. Mycologia 104: 1097–1108.
Corresponding author: email@example.com
from Hong et al. (2012)
“Aqui” refers to the habitat where it was isolated, and “morbida” refers to causing diseases.
Type: UNITED STATES OF AMERICA, Virginia, isolated from agricultural irrigation reservoirs, VPI [as 'VTMH'] 11739 dried culture from isolate 40A6 [Virginia Tech Massey Herbarium, Blacksburg, Virginia, USA]
Ex-type: culture ATCC MYA-4578 (40A6)
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 aquimorbida CPHST BL 128
- NCBI: Phytophthora aquimorbida 40A6
- Phytophthora DATABASE: Phytophthora aquimorbida PD_02802 (= MYA-4578)
- EPPO-Q-bank: Phytophthora aquimorbida
- BOLDSYSTEMS: Phytophthora aquimorbida (barcoding COI & ITS)
Position in ITS phylogenetic tree
adapted from Hong et al. (2012)
Colonies and cardinal temperatures
Colony growth at 7 days in V8 agar, potato dextrose agar, malt extract agar slight rosette. The minimum temperature for culture growth is 5°C, with an optimum of 30°C, and a maximum of 40°C.
Conditions for growth and sporulation
Sporangia nonpapillate, persistent, ovoid to ellipsoidal (28–68 μm long and 21–47 μm wide), borne on unbranched sporangiophores, some with nested or extended proliferation. Hyphal swellings catenulate and radiating are observed in some isolates. Chlamydospores absent.
Homothallic. Oogonia smooth-walled, globose (24–41 μm diam) some with tapered base, produced terminal, intercalary, or lateral; antheridia amphigynous and are mostly seldom present; oospores plerotic (29–36 μm diam).
Most typical characters
Additional specimen(s) evaluated
Hosts and distribution
Distribution: Virginia, USA
Substrate: Phytophthora aquimorbida C.X. Hong was recovered from irrigation runoff reservoirs in Virginia.
Disease note: Phytophthora aquimorbida is pathogenic on rhododendron plants and caused root discoloration, pale leaves, wilting, tip necrosis, and dieback.
Retrieved January 19, 2018 from U.S. National Fungus Collections Nomenclature Database.
Additional references and links
- Phytophthora DATABASE: Phytophthora aquimorbida
- Q-bank: Phytophthora aquimorbida
- SMML USDA-ARS: Phytophthora aquimorbida
- CABI Invasive Species Compendium: Phytophthora aquimorbida
- EPPO Global Database: Phytophthora aquimorbida
- Encyclopedia of Life (EOL): Phytophthora aquimorbida
- Index Fungorum (IF): Phytophthora aquimorbida
- Plantwise Knowledge Bank: Phytophthora aquimorbida
- Google All Phytophthora aquimorbida
- Google Images Phytophthora aquimorbida
- Google Scholar Phytophthora aquimorbida
Fact sheet author
Z. Gloria Abad, Ph.D., USDA-APHIS-PPQ-S&T Beltsville Laboratory, United States of America