Name and publication
Phytophthora multivesiculata Ilieva, Man in ‘t Veld, Veenbaas-Rijks & Pieters (1998)
Ilieva E, Man in 't Veld WA, Veenbaas-Rijks W, and Pieters R. 1998. Phytophthora multivesiculata, a new species causing rot in Cymbidium. Eur. J. Plant Pathol. 104: 677–684.
Nomenclature
from Ilieva et al. (1998)
Mycobank
Typification
Type: NETHERLANDS, Mijdrecht, isolated from leaves of Cymbidium on November, 1995, dry culture CBS 6034 deposited in herbarium Centraalbureau voor Schimmelcultures, Baarn, the Netherlands
Ex-type: CBS 545.96
Ex-type in other collections
CBS 545.96 = PD 95/8679, P10410 (WOC/WPC), CPHST BL 50G (Abad), 29E3 (Yang)
Molecular identification
Voucher sequences for barcoding genes (ITS rDNA and COI) of the ex-type (see Molecular protocols page)
Phytophthora multivesiculata isolate CPHST BL 50G (= P10410 WPC) = ITS rDNA MG865544, COI MH136937
Sequences for ex-type in other sources
- NCBI: Phytophthora multivesiculata CPHST BL 50G
- NCBI: Phytophthora multivesiculata P10410
- NCBI: Phytophthora multivesiculata CBS 545.96
- NCBI: Phytophthora multivesiculata CBS545.96
- Phytophthora DATABASE: Phytophthora multivesiculata PD-00001 (= P10410)
- EPPO-Q-bank: Phytophthora multivesiculata CBS 545.96 (= PD 95/8679)
- BOLDSYSTEMS: Phytophthora multivesiculata OOMYA 180-07 [COI-5P:680, ITS:803] = CBS 545.96; OOMYA 533-08 [ITS:2284] = CBS 545.96 (barcoding COI & ITS)
Position in ITS phylogenetic tree
Clade 2
Morphological identification
Colonies and cardinal temperatures
Colony morphology after 7 days of growth on V8 agar, potato dextrose agar, and malt extract with no distinct pattern to slightly radiate. Minimum temperature for growth is 6°C, optimum 21–27°C, and maximum 30°C.
Asexual phase
Sporangia nonpapillate, rarely with two apices; persistent; ovoid, obpyriform occasionally with tapered base (30–60 L x 20–41 W μm); sporangia showing internal and external proliferation and produced singly on long, slender, mainly twisted sporangiophores or in sympodial arrangement of 2 or 3 sporangia; some sporangia laterally attached to sporangiophore. Hyphal swellings globose and catenulate. Chlamydospores absent.
Sexual phase
Homothallic. Oogonia smooth-walled (28–50 μm diam.); antheridia predominantly amphigynous, irregularly spherical or ellipsoidal, sometimes with digitated projections; oospores plerotic or slightly aplerotic (24–42 μm diam.).
NOTES:
- Original publication refers to the presence of semipapillate and nonpapillate sporangia. In our observations of the ex-type P10410, only nonpapillate sporangia have been observed.
- Original manuscript refers to oospores mostly aplerotic. Oospores of specimen P10410 are plerotic or slightly aplerotic.
Most typical characters
Phytophthora multivesiculata is characterized by the presence of globose and catenulated hyphal swellings.
Specimen(s) evaluated
Phytophthora multivesiculata ex-type CPHST BL 50G, duplicate of P10410 ex-type (World Phytophthora Collection), which is a duplicate of ex-type CBS 545.96
Hosts and distribution
Distribution: Australia, Europe (the Netherlands, type)
Substrate: leaves, stems, base of bulbs
Disease note: leaf and stem rot, bulb rot
Host: Cymbidium sp. (Orchidaceae)
Retrieved January 31, 2018 from U.S. National Fungus Collections Nomenclature Database.
Quarantine status
USA: This species was listed as a species of concern during the 2009 Phytophthora prioritization project conducted by USDA APHIS PPQ CPHST PERAL (Schwartzburg et al.).
Additional references and links
- Phytophthora DATABASE: Phytophthora multivesiculata
- EPPO-Q-bank: Phytophthora multivesiculata
- SMML USDA-ARS: Phytophthora multivesiculata
- EPPO Global Database: Phytophthora multivesiculata
- CABI Invasive Species Compendium: Phytophthora multivesiculata
- Encyclopedia of Life (EOL): Phytophthora multivesiculata
- Index Fungorum (IF): Phytophthora multivesiculata
- Plantwise Knowledge Bank: Phytophthora multivesiculata
- Google All Phytophthora multivesiculata
- Google Images Phytophthora multivesiculata
- Google Scholar Phytophthora multivesiculata
Fact sheet authors
Treena Burgess, Ph.D., Centre for Phytophthora Science and Management, School of Biological Sciences and Biotechnology, Murdoch University, Australia; Z. Gloria Abad, Ph.D., USDA-APHIS-PPQ-S&T Beltsville Laboratory, United States of America