Name and publication

Phytophthora prodigiosa Cacciola & Tri (2018)

Cacciola SO, Aloi F, Tri VM, Jung T, and Schena L. 2017. Phytophthora prodigiosa Cacciola & Tri. Fungal Planet Description Sheet: 616. Persoonia 38: 365. In: Crous et. al. 2017. Fungal Planet Description Sheets: 558–624. Persoonia 38: 240–384.

Cacciola, SO; Aloi, F; Tri, MV; Jung, T; Schena, L. 2018. Nomenclatural novelties. Index Fungorum. 368:1-1

Corresponding author: olgacacciola@unict.it

Nomenclature

from Cacciola et al. (2017)

Mycobank

MB554541 (Cacciola et al. 2018)

MB820797 (old code Cacciola et al. 2017)

Etymology

refers to the bizarre (prodigiosum in Latin) and unusual shape of the hyphal swellings

Typification

Type: Southern Vietnam, Vĩnh Long province, Mekong Delta region, from Citrus grandis (syn.: C. maxima) fruit, 2012, A. De Patrizio & G. Magnano di San Lio PF6e (holotype CBS 135138 in Cacciola et al. 2018).

Ex-type: PF6e 

Sequences for ex-type in original manuscript:  as Phytophthora insolita isolate PF6e ITSrDNA KC875840, COI KT366918

Ex-type in other collections

(ET) CBS 135138, NRRL 64326, PF6e, S&T BL 220 (Abad)

Molecular identification

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

Phytophthora prodigiosa isolate PF6e = ITS rDNA KC875840, COI KT366918

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 prodigiosa PF6e as P. insolita
• EPPO-Q-bank:  Phytophthora prodigiosa
• BOLDSYSTEMS: Phytophthora prodigiosa (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
9b

Morphological identification

adapted from Cacciola et al. (2017)

Colonies and cardinal temperatures

Colony colony:
assemblage of hyphae which usually develops form a single source and grows in a coordinated way
morphology on V8A and PDA with a rosaceous growth pattern. Minimum growth temperature 12°C, optimum 32°C, and maximum 36°C. 

Conditions for growth and sporulation

Sporangia produced on V8-agar flooded with both distilled water and non-sterile soil extract. Hyphal swellings formed abundantly on V8A.

Asexual phase

SporangiaSporangia:
sac within which zoospores form, especially when water is cooled to about 10°C below ambient temperature; in solid substrates, sporangia usually germinate by germ tubes
nonpapillatenonpapillate:
pertaining to the production of a non-distinct, or inconspicuous, papilla at the distal end of the sporangium (cf. papillate and semipapillate)
; persistentpersistent:
pertaining to sporangia that remain attached to the sporangiophore and do not separate or detach easily (cf. caducous)
; ovoidovoid:
egg-shaped, with the widest part at the base of the sporangium and the narrow part at the apex
to obpyriformobpyriform:
inversely pear-shaped, i.e. with the widest part at the point of attachment (cf. pyriform)
(30–50 ×19–34 μm); showing internal (nested) and external proliferationexternal proliferation:
formation of a sporangium after a sporangiophore has emerged from beneath and external to an empty sporangium that has previously emitted its zoospores (cf. internal proliferation)
; originated in unbranched sporangiophores. Hyphal swellings catenulatecatenulate:
having a chain-like form
, elongated to globoseglobose:
having a rounded form resembling that of a sphere
and distorted shapes. 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
globose globose:
having a rounded form resembling that of a sphere
to obpyriformobpyriform:
inversely pear-shaped, i.e. with the widest part at the point of attachment (cf. pyriform)
(20–48 μm), sometimes laterally attached.

Sexual phase

Sterile.

Hosts and distribution

Distribution: Asia (Vietnam)
Substrate: roots, fruit
Disease note: fruit rot, root rot
Host: Citrus grandis (Rutaceae)

Retrieved February 01, 2018 from U.S. National Fungus Collections Nomenclature Database.

Additional references and links

 

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

 

• Google All Phytophthora prodigiosa
• Google Images Phytophthora prodigiosa
• Google Scholar Phytophthora prodigiosa

Fact sheet author

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