Phytophthora aquae-cooljarloo

Name and publication

Phytophthora aquae-cooljarloo R. Mostowfizadeh-Ghalamfarsa & T.I. Burgess (2020)

Mostowfizadeh-Ghalamfarsa R, Burgess TI. 2020. Phytophthora aquae-cooljarloo. Fungal Planet 1167. in Crous et al. Fungal Planet Description Sheets 1284–1382. Persoonia 45: 241–409

Nomenclature

Mycobank

MB835165

Etymology

named for the association of this species with water at the place Cooljarloo

Typification

Type: AUSTRALIA, Western Australia, Cooljarloo, baited from pond water, 20 Sept. 2017, holotype MURU484

Ex-type: culture CBS 146550 = VHS36940

Sequences for ex-type in original manuscript:  ITS MT210484, β-tubulin MT210475, HSP90 MT210480, cox1 MT210466, nadh1 MT210470, LSU MT210485

Molecular identification

Position in ITS phylogenetic tree

Clade 9c

Morphological identification

Colonies and cardinal temperatures

Colony morphology on CA, V8A, and MEA was uniform, rosaceous pattern observed on PDA. Minimum growth temperature 4°C, optimum 30°C, and maximum 35°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 readily in single-strain culture on CA and V8 after about 14 d.

Asexual phase

Sporangia were non-papillate, persistent, and predominantly ellipsoid to ovoid in shape with internal proliferation, both nested and extended. Sporangia averaged 66 x 37 µm (overall range 38–101 x 29–54 µm).Sporangiophores simple. Hyphal swellings absent. Chlamydospores present.

Sexual phase

Homothallic. Oogonia had smooth walls and size ranged from 23–47 µm. Oospores aplerotic, globose, and golden brown on maturity, size ranged 19–41 µm. Antheridia paragynous.

Most typical characters

Phytophthora aquae-cooljarloo has similar morphology to related species in clade 6a.

Specimen(s) evaluated

Australia, Western Australia, Cooljarloo, baited from pond water, 2017, CBS 146550; 2019, VHS39966; 1996, HSA2304

Hosts and distribution

Distribution: Australia
Substrate: water
Disease: no known disease

Additional references and links

none available

Fact sheet author

Treena Burgess, Ph.D., Phytophthora Science and Management, Harry Butler Institute, Murdoch University