Phytophthora mirabilis

Name and publication

Phytophthora mirabilis Galindo & Hohl (1986)

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





named for the host range restricted to Mirabilis jalapa


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

CBS 678.85 (M10) = ATCC 64071, ATCC 64130, P3008 (WOC/WPC), Hohl NR 190, CPHST BL 25 (Abad)

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

Sequences for ex-type in other sources
Position in ITS phylogenetic tree

Clade 1c

Morphological identification

Colonies and cardinal temperatures

Colony 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; caducous with short pedicels; limoniform, ellipsoid, ovoid, obpyriform, obovoid (18–59 L x 9–19 W µm) sometimes with tapered bases; originated in compound sympodial sporangiophores. Hyphal swellings absent. Chlamydospores absent.

Sexual phase

Heterothallic. Oogonia smooth-walled, globose (25–50 µm diam.) sometimes with tapered bases; antheridia amphyginous; oospores plerotic and aplerotic.

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

Fact sheet author

Z. Gloria Abad, Ph.D., USDA-APHIS-PPQ-S&T Beltsville Laboratory, United States of America