Phytophthora panamensis

Name and publication

Phytophthora panamensis T. Jung, Y. Balci, K. Broders & I. Milenković, (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.





refers to Panama, the country where this species was first isolated


Type: PANAMA, Parque Nacional Sobernia, isolated from necrotic lesion on a naturally fallen leaf of a non-identified tree species in a tropical lowland forest, Nov. 2019, K.D. Broders & Y. Balci (holotype CBS H-24773, dried culture on V8A

Ex-type: culture CBS 147925 = PA328

Sequences for ex-type in original manuscript:  ITS MZ753919, cox1 MZ736433, β-tubulin MZ736459, tigA MZ736486

Molecular identification

Position in ITS phylogenetic tree

Clade 4

Morphological identification

Colonies and cardinal temperatures

Colony morphology submerged to appressed on CA, radiate on V8A, felty and petaloid on PDA. Minimum growth temperature 15°C, optimum 27.5–30°C, and maximum 32.5°C.

Conditions for growth and sporulation

Sporangia produced on non-sterile soil extract. Oogonia are formed readily in single culture.

Asexual phase

Sporangia were papillate, persistent, and predominantly ovoid or elongated ovoid in shape. Sporangia averaged 44 x 30 µm (overall range 28.5–63 x 20.3–41.3 µm). Sporangiophores unbranched or loose sympodia. Hyphal swellings absent. Chlamydospores absent.

Sexual phase

Homothallic. Oogonia smooth-walled, size ranged from 16–31 µm. Oospores plerotic. Antheridia paragynous.

Most typical characters

Morphologically similar to other species in Clade 4, but has higher temperature minimum and optimal temperatures for growth.

Additional specimen(s) evaluated

Panama, Parque Nacional Sobernia, isolated from necrotic lesions on naturally fallen leaves of non-identified tree species in tropical lowland forests, Nov. 2019, K.D. Broders & Y. Balci, CBS 147926 = PA329; PA019; PA040; PA108

Hosts and distribution

Distribution: Panama
Substrate: fallen leaf
Disease note: on found on fallen leaf litter
Host: unknown

Additional references and links

none available

Fact sheet author

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