Phytophthora prodigiosa

Name and publication

Phytophthora prodigiosa Cacciola & Tri (2017)

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

PF6e 

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

Sequences for selected specimen(s) in other sources
  • NCBI: Phytophthora prodigiosa PF6e as P. insolita
  • Phytophthora Database:  Phytophthora prodigiosa
  • EPPO-Q-bank:  Phytophthora prodigiosa
  • BOLDSYSTEMS: Phytophthora prodigiosa (barcoding COI & ITS)
Position in ITS phylogenetic tree

Clade 9b

Morphological identification

adapted from Cacciola et al. (2017)

Colonies and cardinal temperatures

Colony 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

Sporangia nonpapillate; persistent; ovoid to obpyriform (30–50 ×19–34 μm); showing internal (nested) and external proliferation; originated in unbranched sporangiophoresHyphal swellings catenulate, elongated to globose and distorted shapes. Chlamydospores globose to obpyriform (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

Fact sheet author

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