Name and publication

Phytophthora mirabilis Galindo & H.R. Hohl (1986)  

Galindo AJ and Hohl HR. 1985. Phytophthora mirabilis a new species of Phytophthora. Sydowia 38: 87–96 (p 95).

Nomenclature

Mycobank

MB128307

Etymology

named for the host range restricted to Mirabilis jalapa

Typification

Type: MEXICO, collected from Mirabilis jalapa near Texcoco, Central Plateau, by H.R. Hohl, Oct. 1985, Type M10, CBS 678.85

Ex-type: CBS 678.85

Sequences for ex-type in original manuscript: AF266777, FJ801821

Ex-type in other collections

(ET) CBS 678.85, ATCC 64071, ATCC 64130,  WPC P3008, S&T BL 25 (Abad), M10

Molecular identification

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

Phytophthora mirabilis isolate CPHST BL 25 (= P3008 WPC) = ITS rDNA MG865541, COI MH136934

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 mirabilis CPHST BL 25 
• NCBI: Phytophthora mirabilis P3008
• NCBI: Phytophthora mirabilis CBS 678.85
• EPPO-Q-bank: Phytophthora mirabilis CBS 678.85
• BOLDSYSTEMS: Phytophthora mirabilis (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
1c

Morphological identification

Colonies and cardinal temperatures

Colony colony:
assemblage of hyphae which usually develops form a single source and grows in a coordinated way
morphology on CMA and PDA with no distinct pattern, V8 very low growth. Minimum temperature for growth 6°C, optimum 18°C, and maximum 24°C.

Asexual phase

Sporangia semipapillate; caducouscaducous:
pertaining to sporangia that become dislodged readily (i.e. deciduous) and separate from the sporangiophore (cf. persistent)
with short pedicels; limoniform, ellipsoidellipsoid:
refers to a solid body that forms an ellipse in the longitudinal plane and a circle in cross section; many fungal spores are ellipsoidal or elliptic
, ovoidovoid:
egg-shaped, with the widest part at the base of the sporangium and the narrow part at the apex
, obpyriformobpyriform:
inversely pear-shaped, i.e. with the widest part at the point of attachment (cf. pyriform)
, obovoidobovoid:
inversely egg-shaped; ovoid, but with the widest part at the apex
(18–59 L x 9–19 W µm) sometimes with tapered bases; originated in compound sympodial sporangiophores. Hyphal swellings absent. ChlamydosporesChlamydospores:
an asexual spore with a thickened inner wall that is delimited from the mycelium by a septum; may be terminal or intercalary, and survives for long periods in soil
absent.

Sexual phase

Heterothallic. OogoniaOogonia:
the female gametangium in which the oospore forms after fertilization by the antheridium
smooth-walled, globoseglobose:
having a rounded form resembling that of a sphere
(25–50 µm diam.) sometimes with tapered bases; antheridiaantheridia:
the male gametangium; a multinucleate, swollen hyphal tip affixed firmly to the wall of the female gametangium (the oogonium)
amphyginous; 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)
and apleroticaplerotic:
pertaining to a mature oospore that does not fill the oogonium; i.e. there is room left between the oospore wall and oogonium wall (cf. plerotic)
.

Specimen(s) evaluated

Phytophthora mirabilis ex-type CPHST BL 25, duplicate of P3008 (World Phytophthora Collection)

Hosts and distribution

Notes: According to Goodwin et al. (1999), the name Phytophthora infestans var. mirabilis was published by Servin in 1958, but we could not locate the publication, and could not confirm that this name was validly published.

Distribution: North America (Mexico)
Substrate: leaves
Disease note: leaf blight
Host: Mirabilis jalapa (Nyctaginaceae)

Retrieved January 31, 2018 from U.S. National Fungus Collections Nomenclature Database.

Additional references and links

 

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

 

• Google All Phytophthora mirabilis
• Google Images Phytophthora mirabilis
• Google Scholar Phytophthora mirabilis

Fact sheet author

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