Name and publication
Phytophthora transitoria I. Milenković, T. Májek & T. Jung (2022)
Chen Q, Bakhshi M, Balci Y, Broders KD, Cheewangkoon R, Chen SF, Fan XL, Gramaje D, Halleen F, Horta Jung M, Jiang N, Jung T, Májek T, Marincowitz S, Milenković I, Mostert L, Nakashima C, Nurul Faziha I, Pan M, Raza M, Scanu B, Spies CFJ, Suhaizan L, Suzuki H, Tian CM, Tomšovský M, Úrbez-Torres JR, Wang W, Wingfield BD, Wingfield MJ, Yang Q, Yang X, Zare R, Zhao P, Groenewald JZ, Cai L, Crous PW, 2022. Genera of phytopathogenic fungi: GOPHY 4. Studies in Mycology. 101: 417–564.
Type: CZECH REPUBLIC, Central Bohemian region, Obříství, isolated from rhizosphere soil of a Quercus robur (Fagaceae) seedling, Mar. 2018, I. Milenković (holotype CBS H-24578, dried culture on V8A)
Ex-type: culture CBS 147245 = CZ001
Sequences for ex-type in original manuscript: ITS MZ753925, cox1 MZ736439, β-tubulin MZ736466, tigA MZ736493
Position in ITS phylogenetic tree
Colonies and cardinal temperatures
Colony morphology uniform and submerged on V8A and CA, uniform and felty on PDA. Minimum growth temperature <10°C, optimum 22.5°C, and maximum 30°C.
Conditions for growth and sporulation
Primary sporangia were non-papillate, persistent, and predominantly sub-globose to ovoid in shape. Sporangia averaged 32.5 x 25.7 µm (overall range 20–42.5 x 15–33.3 µm). Sporangiophores unbranched. Secondary sporangia were sessile or on short stalks emerging at or near apex, non-papillate, persistent, and predominantly sub-globose to ovoid in shape. Hyphal swellings absent. Chlamydospores present.
Sterile in culture.
Most typical characters
Additional specimen(s) evaluated
Czech republic, Central Bohemian region, Obříství, isolated from rhizosphere soil of nursery-grown Quercus robur seedlings, Mar. 2018, I. Milenković, CBS 147246 = CZ118; CZ119; CZ120; CZ121; CZ123
Hosts and distribution
Distribution: Czech Republic
Disease note: rhizosphere of nursery grown Quercus robur seedlings
Host: Quercus robur
Additional references and links
Fact sheet author
Treena Burgess, Ph.D., Phytophthora Science and Management, Harry Butler Institute, Murdoch University