Name and publication

Phytophthora capensis Bezuid., Denman, A. McLeod & S.A. Kirk (2010)

Bezuidenhout CM, Denman S, Kirk SA, Botha WJ, Mostert L, and McLeod A. 2010. Phytophthora taxa associated with cultivated Agathosma, with emphasis on the P. citricola complex and P. capensis sp. nov. Persoonia 25: 32–49 (pg. 45).

Corresponding authors e-mails: LubbeC@arc.agric.za, adelem@sun.ac.za

Nomenclature

from Bezuidenhout et al. (2010)

Mycobank

MB518805

Etymology

from ‘the Cape’ – the historic and generic name given to the area it was isolated from

Typification

Type: SOUTH AFRICA, Western Cape Province, on roots of Assegai tree (Curtisia dentata), date unknown, S. von Broembsen, WPC WOC P1819 (World Phytophthora Collection), maintained in metabolically inactive state

Ex-type: cultures P1819 (WPC), CBS 128319

Sequences for ex-type in original manuscript: Phytophthora capensis P1819: ITS GU191232, β-Tub GU191328, TEF-1a GU191199, NADH1 GU191257, cox1 GU191275

Ex-type in other collections:

(ET) CBS 128319, WPC P1819, S&T BL 10 (Abad), 62C1 (Hong)

Molecular identification

Voucher sequences for barcoding genes (ITS rDNA and COI) of the ex-type (see Molecular protocols page)

Phytophthora capensis isolate CPHST BL 10 (= P1819 WPC) = ITS rDNA MG865466, COI MH136862

Voucher sequences for Molecular Toolbox with seven genes (ITS, β-tub, COI, EF1α, HSP90, L10, and YPT1

(see Molecular protocols page) (In Progress)

Voucher sequences for Metabarcoding High-throughput Sequencing (HTS) Technologies [Molecular Operational Taxonomic Unit (MOTU)]

(see Molecular protocols page) (In Progress)

Sequences with multiple genes for ex-type in other sources

• NCBI: Phytophthora capensis CPHST BL 10 
• NCBI: Phytophthora capensis P1819
• EPPO-Q-bank: Phytophthora capensis CBS 128319
• BOLDSYSTEMS: Phytophthora capensis (barcoding COI & ITS)

Position in multigenic phylogeny with 7 genes (ITS, β-tub, COI, EF1α, HSP90, L10, and YPT1)

Clade clade:
a taxonomic group of organisms classified together on the basis of homologous features traced to a common ancestor
2c

Morphological identification

adapted from Bezuidenhout et al. (2010)

Colonies and cardinal temperatures

Phytophthora capensis has distinctive uniform, chrysanthemum pattern colonycolony:
assemblage of hyphae which usually develops form a single source and grows in a coordinated way
morphology on carrot agar (CA) and forms abundant aerial myceliummycelium:
mass of hyphae constituting the body, or thallus, of fungi and oomycetes; in <em>Phytophthora</em> species, mycelia is coenocytic
after four days at temperatures between 15–27.5 °C. Cardinal temperatures: minimum 5 °C, optimum 23°C, maximum 28°C.

Asexual phase

Sporangia semipapillate, persistentpersistent:
pertaining to sporangia that remain attached to the sporangiophore and do not separate or detach easily (cf. caducous)
, limoniform, occasionally ovoidovoid:
egg-shaped, with the widest part at the base of the sporangium and the narrow part at the apex
(27–50 μm length x 17–32 μm wide), non-proliferating, formed on single unbranched sporangiophores. Hyphal swellings absent. Chlamydospores absent.

Sexual phase

Homothallic. OogoniaOogonia:
the female gametangium in which the oospore forms after fertilization by the antheridium
spherical (20–27.5 μm diam.) and formed on the terminal ends of hyphae; antheridiaantheridia:
the male gametangium; a multinucleate, swollen hyphal tip affixed firmly to the wall of the female gametangium (the oogonium)
paragynousparagynous:
pertaining to the sexual stage in which the antheridium is attached to the side of the oogonium (cf. amphigynous)
, single-celled; oosporesoospores:
zygote or thick-walled spore that forms within the oogonium after fertilization by the antheridium; may be long-lived
pleroticplerotic:
pertaining to an oospore that fills the oogonium (cf. aplerotic)
(22.7 μm diam.) and thick-walled.

Additional specimen(s) evaluated

Phytophthora capensis ex-type CPHST BL 10 (Abad) = P1819 [World Phytophthora Collection (WPC) California, USA]

Hosts and distribution

Distribution: Africa (South Africa), Asia (Taiwan)
Substrate: roots
Hosts: multiple hosts

Retrieved January 29, 2018 from U.S. National Fungus Collections Nomenclature Database.

Additional references and links

 

• SMML USDA-ARS: Phytophthora capensis
• EPPO Global Database: Phytophthora capensis
• Forest Phytophthoras of the world: Phytophthora capensis
• CABI Digital Library: Phytophthora capensis
• Encyclopedia of Life (EOL): Phytophthora capensis
• Index Fungorum (IF): Phytophthora capensis

 

• Google All Phytophthora capensis
• Google Images Phytophthora capensis
• Google Scholar Phytophthora capensis

Fact sheet author

Z. Gloria Abad, Ph.D., USDA-APHIS-PPQ-S&T Plant Pathogen Confirmatory Diagnostics Laboratory (PPCDL), United States of America.