Name and publication
Phytophthora ornamentata Scanu, Linaldeddu & Jung (2015)
Scanu B, Linaldeddu BT, Deidda A, and Jung T. 2015. Diversity of Phytophthora species from declining Mediterranean maquis vegetation, including two new species, Phytophthora crassamura and P. ornamentata sp. nov. PLoS ONE 10 (12): e0143234. Doi:10.1371/journal.pone.0143234
Corresponding author: bscanu@uniss.it
Nomenclature
from Scanu et al. (2014)
Mycobank
Etymology
refers to the ornamentation of the oogonial wall
Typification
Type: ITALY, Sardinia. Isolated from rhizosphere soil collected beneath declining Pistacia lentiscus; collected: B. Scanu, 2012; CBS H-22393 (holotype, dried culture on CA, Herbarium CBS-KNAW Fungal Biodiversity Centre)
Ex-type: CBS 140647 = PH152 (culture ex-type)
Sequences for ex-type: Phytophthora ornamentata isolate PH152 ITS rDNA KP863496, cox1 KP863486
Ex-type in other collections
CBS 140647 = P19906 (WPC/WOC), CPHST BL 152 (Abad), 66D2 (Hong)
Molecular identification
Voucher sequences for barcoding genes (ITS rDNA and COI) of the ex-type (see Molecular protocols page)
Phytophthora ornamentata isolate CPHST BL 152B (= P19906 WPC) = ITS rDNA MG865556, COI MH136947
Sequences for ex-type in other sources
- NCBI: Phytophthora ornamentata CPHST BL 152B
- NCBI: Phytophthora ornamentata PH152
- Phytophthora DATABASE: Phytophthora ornamentata
- EPPO-Q-bank: Phytophthora ornamentata
- BOLDSYSTEMS: Phytophthora ornamentata
Position in ITS phylogenetic tree
Clade 6b
Morphological identification
adapted from Scanu et al. (2014)
Colonies and cardinal temperatures
Colony morphology after 7 days on PDA, CMA, and MEA with no distinct pattern. Minimum growth temperature 5°C; optimum 25°C, and maximum 33°C.
Conditions for growth and sporulation
Phytophthora ornamentata produces sporangia only rarely in solid media (CA) but readily though not abundantly when CA plugs are flooded with nonsterile soil extract water after 24–48 hours of incubation at 20°C.
Asexual phase
Sporangia nonpapillate, persistent; ovoid, obpyriform, ellipsoid (39–79 x 21–53 µm) proliferating internally in both a nested, never external proliferation and originated on unbranched sporangiophores. Hyphal swellings globose, elongated, and catenulated. Chlamydospores absent.
Sexual phase
Homothallic. Oogonia ornamented (28–42 µm diam); antheridia predominately paragynous (11–20 x 9–18 µm); oospores slightly aplerotic (27–43 µm diam).
Additional specimen(s) evaluated
Phytophthora ornamentata ex-type CPHST BL 152, duplicate of P19906 (World Oomycetes/Phytophthora Collection), which is a duplicate of the ex-type CBS 140647
Hosts and distribution
Distribution: Europe (Italy)
Substrate: rhizosphere soil/roots
Disease Note: decline
Host: Pistacia lentiscus (Anacardiaceae)
Retrieved January 31, 2018 from U.S. National Fungus Collections Nomenclature Database.
Additional references and links
- Phytophthora DATABASE: Phytophthora rnamentata
- EPPO-Q-bank: Phytophthora ornamentata
- SMML USDA-ARS: Phytophthora ornamentata
- EPPO Global Database: Phytophthora ornamentata
- CABI Invasive Species Compendium: Phytophthora ornamentata
- Encyclopedia of Life (EOL): Phytophthora ornamentata
- Index Fungorum (IF): Phytophthora ornamentata
- Plantwise Knowledge Bank: Phytophthora ornamentata
- Google All Phytophthora ornamentata
- Google Images Phytophthora ornamentata
- Google Scholar Phytophthora ornamentata
Fact sheet author
Z. Gloria Abad, Ph.D., USDA-APHIS-PPQ-S&T Beltsville Laboratory, United States of America