Name and publication
Phytophthora lateralis Tucker & Milbrath (1942)
Tucker CM and Milbrath JA. 1942. Root rot of Chamaecyparis caused by a species of Phytophthora. Mycologia 34: 94–103.
from Tucker and Milbrath (1942)
Type: UNITED STATES OF AMERICA, Port Orford, Cedar (Chamaecyparis lawsoniana), Oregon, CBS-H-7643
Ex-type: CBS 168.42
Ex-type in other collections
Voucher sequences for barcoding genes (ITS rDNA and COI) of the ex-type (see Molecular protocols page)
Sequences for ex-type in other sources
- NCBI: Phytophthora lateralis CPHST BL 42
- NCBI: Phytophthora lateralis CBS 168.42
- Phytophthora Database: Phytophthora lateralis
- EPPO-Q-bank: Phytophthora lateralis CBS 168.42
- BOLDSYSTEMS: Phytophthora lateralis OOMYA028-07 = CBS 168.42 (barcoding COI & ITS); OOMYA522-08 = CBS 168.42 (barcoding ITS)
Position in ITS phylogenetic tree
Genome sequence of ex-type
Colonies and cardinal temperatures
Colony morphology after 7 days of growth on V8-A and MEA with no distinctive pattern, on PDA coarsely radiate. Minimum temperature for growth is 3°C, optimum 20°C, and maximum 25°C.
Conditions for growth and sporulation
Sporangia are not produced on agar media, but produced relatively abundantly on washed mycelial mats transferred from 7-day pea broth cultures (20°C) to sterile distilled water and incubated 7 days at 20°C. Chlamydospores abundant in agar cultures and liquid media.
Sporangia nonpapillate; persistent; ovoid, obovoid, obpyriform, elongate (24–76 L x 19–41 W µm); originated unbranched in long sporangiophores, by external proliferation and on simple sympodial sporangiophores. Hyphal swellings globose, catenulate, or with irregular shape. Chlamydospores subspherical to spherical, occasionally ovoid to irregular; individual or distant catenulated; lateral, terminal, or intercalary (20–77 µm diam).
Note: Original publication of Tucker, C.M.; Milbrath, J.A. 1942 referred to oogonia, antheridia, and oospores as unknown. Isolate of the ex-type CBS 168.42 evaluated by Q-Bank has not produced oospores, and the same results were found for the duplicate of the ex-type CPHST BL 42.
Most typical characters
Additional well-authenticated specimens evaluated:
P. lateralis P3888 (World Phytophthora Collection)
P. lateralis P11090 (World Phytophthora Collection)
Hosts and distribution
Distribution: widespread. Reports from New Zealand and North Carolina are doubtful.
Substrate: roots, crown, bark, occasionally on foliage
Disease note: root and crown rot, girdling, death
Host: Chamaecyparis lawsoniana (Lawson cypress aka Port Orford cedar), C. lateralis (Cupressaceae), rarely, Taxus brevifolia (Pacific yew, Taxaceae). Hosts in other families can be infected when inoculated.
Retrieved January 31, 2018 from U.S. National Fungus Collections Nomenclature Database.
Additional references and links
- Phytophthora DATABASE: Phytophthora lateralis
- EPPO-Q-bank: Phytophthora lateralis
- SMML USDA-ARS: Phytophthora lateralis
- EPPO Global Database: Phytophthora lateralis
- Forest Phytophthoras of the world: Phytophthora lateralis
- Forest Reserach UK: Phytophthora lateralis
- CABI Invasive Species Compendium: Phytophthora lateralis
- Encyclopedia of Life (EOL): Phytophthora lateralis
- Index Fungorum (IF): Phytophthora lateralis
- Plantwise Knowledge Bank: Phytophthora lateralis
- Google All Phytophthora lateralis
- Google Images Phytophthora lateralis
- Google Scholar Phytophthora lateralis
Fact sheet author
Z. Gloria Abad, Ph.D., USDA-APHIS-PPQ-S&T Beltsville Laboratory, United States of America