Name and publication
Phytophthora tenuimura T. Jung, T. Corcobado, T. Májek & M. Ferreira, (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 thin oospore walls (tenuis Lat. = thin; mura Lat. = wall).
Type: USA, Louisiana, Archie, isolated from a naturally fallen leaf in a flooded swamp forest. March 2020, T. Corcobado & T. Májek, holotype HNHM-MYC-009709, dried culture on V8A, Herbarium of the Hungarian Natural History Museum, Budapest, Hungary
Ex-type: culture CBS 149227 = NRRL 64142 = LU052
Sequences for ex-type in original manuscript: LSU ON000704, ITS ON000987, β-tubulin OM975977, hsp90 OM976494, tigA OM974671, rpl10 OM97531, tef-1a OM984957, enolase OM976588, cox1 ON013864, ypt1 ON024514, nadh1 OM976973, rps10 OM976732
Position in ITS phylogenetic tree
Colonies and cardinal temperatures
Colony morphology with limited aerial mycelium on V8A and CA with a radiate pattern on V8A and a chrysanthemum pattern on CA; colonies on PDA were dense-felty and stoloniferous. Optimum growth temperature 27.5°C and maximum 30°C.
Conditions for growth and sporulation
Sporangia were nonpapillate, persistent, and predominantly ovoid to elongated ovoid and ellipsoid to elongated ellipsoid in shape. Sporangia averaged 47.5 x 25.0 µm (overall range 30.6–84.9 x 15.6–30.4 µm), proliferation internal, nested, and extended. Sporangiophores unbranched. Hyphae undulating; hyphal swellings absent.Chlamydospores absent.
Most typical characters
Resides in phylogenetic clade 10d, with two other species all recovered from fallen leaves in swamp forest, Louisiana, USA. Unlike P. procera and P. ludoviciana, P. tenuimura produces oospores in culture.
Additional specimen(s) evaluated
USA, Louisiana, Archie, isolated from a naturally fallen leaf in a flooded swamp forest. March 2020, T. Corcobado & T. Májek, LU050, LU051, LU065, LU066, LU073, LU074
Hosts and distribution
Substrate: fallen leaf
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