Name and publication
Phytophthora pseudogallica T. Jung, N.M. Chi, Brasier & I. Milenković (2022)
Jung T, Milenković I, Corcobado T. et al. 2022. Extensive morphological and behavioural diversity among fourteen new and seven described species in Phytophthora Clade 10 and its evolutionary implications. Persoonia-Molecular Phylogeny and Evolution of Fungi 49: 1–57.
Name refers to the morphological similarity to P. gallica.
Type: Sapa, isolated from a fallen leaf in a stream running through an evergreen cloud forest, 2017, T. Jung & N.M. Chi, holotype HNHM-MYC-009706, dried culture on V8A, Herbarium of the Hungarian Natural History Museum, Budapest, Hungary
Ex-type: culture CBS 149206 = NRRL 64136 = VN861
Sequences for ex-type in original manuscript: LSU ON000680, ITS ON000774, β-tubulin OM975953, hsp90 OM976470, tigA OM974647, rpl10 OM97507, tef-1a OM984933, enolase OM976564, cox1 ON013840, ypt1 ON024990, nadh1 OM976949, rps10 OM976708
Position in ITS phylogenetic tree
Colonies and cardinal temperatures
Colony morphology striate on V8A with white aerial mycelium in the center and appressed to submerged margins, uniform and dense-felty on CA, and stoloniferous dense-felty on PDA. Optimum growth temperature 20°C and maximum 25°C.
Conditions for growth and sporulation
Sporangia were nonpapillate, persistent, and predominantly ovoid to broad ovoid in shape. Sporangia averaged 25.2 x 21.3 µm (overall range 19.4–33.7 x 13.0–29.5 µm), proliferation internal, nested, and extended. Sporangiophores unbranched. Hyphal swellings absent. Chlamydospores present, golden brown.
Sterile in culture.
Most typical characters
Resides in phylogenetic clade 10b, and is most closely related to P. tonkinensis, but differs by not producing oospores in culture. Morphologically it resembles P. gallica, another species from clade 10b.
Additional specimen(s) evaluated
Vietnam, Sapa, isolated from fallen leaves in a stream running through an evergreen cloud forest, 2017, T. Jung & N.M. Chi, VN910, VN920, VN922.
Hosts and distribution
Substrate: fallen leaf in stream
Disease note: no known disease
Host: no known host
Additional references and links
Fact sheet author
Treena Burgess, Ph.D., Phytophthora Science and Management, Harry Butler Institute, Murdoch University