Phytophthora condilina

Name and publication

Phytophthora condilina Burgess (2018) 

Burgess TI, Simamora AV, White D, Wiliams B, Schwager M, Stukely MJC, Hardy GE StJ. 2018. New species from Phytophthora Clade 6a: evidence for recent radiation. Persoonia 41: 1–17.

Corresponding author: ​tburgess@murdoch.edu.au

Nomenclature

from Burgess et al. (2018)

Mycobank

MB822010

Etymology

from the Noongar (local Aboriginal) name for Casuarina, a known host of this species

Typification

Type: AUSTRALIA, Western Australia, Alfred Cove, from rhizosphere soil of dying Casuarina obesa, isolated by VHS, 2011 (holotype MURU 476, dried culture on V8A, Herbarium of Murdoch University, Western Australia)

Ex-type: CBS 143059 and VHS 24244

Sequences for ex-type in original manuscript: Phytophthora condilina CBS 143059 ITS KJ372262, TUB MF326814, HSP MF326869, COX MF326843, NADH MF326915

Ex-type in other collections

CBS 143059 = VHS 24244 = CPHST BL 184 (Abad)

Molecular identification

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

Phytophthora condilina isolate CBS 143059 ITS rDNA KJ372262

Phytophthora condilina isolate CPHST BL 184 COI MH477744

Sequences for ex-type in other sources
Position in ITS phylogenetic tree

Clade 6a

Morphological identification

Colonies and cardinal temperatures

Colony morphology is woolly with a slight petaloid pattern on CA and V8A, with striations on MEA, and petaloid on PDA. Minimum growth temperature 4°C, optimum 25°C, and maximum 37.5°C.

Conditions for growth and sporulation

Sporangia are produced in water cultures (soil extract or river water) and not observed in solid media. Oogonia are formed readily in single-strain culture on CA and V8A after about 20 d.

Asexual phase

Sporangia are nonpapillate, persistent, and broad to elongated ovoid in shape. Sporangia average 48.0 ± 7.4 x 36.3 ± 6.2 µm (overall range 29.8–69.3 x 20.1–51.4 µm). Sporangiophores are simple with internal proliferation, both nested and extended. Hyphal swellings are common and predominantly spherical and radiate. Chlamydospores globose.

Sexual phase

Homothallic. Oogonia are globose, smooth or with wavy walls, average size 42.0 ± 4.7 mm (26.9–57.5 µm). Oospores are aplerotic, globose to slightly eccentric with a large ooplast, turning golden-brown on maturity, average size 35.6 ± 3.8 µm (23.3–42.5). 80% of oospores abort after formation of the walls. Antheridia are paragynous.

Most typical characters

Phytophthora condilina closely resembles Phytophthora inundata and Phytophthora humicola; it has no distinguishing features.

Specimen(s) evaluated

Australia, Western Australia, Alfred Cove, from rhizosphere soil of dying Casuarina obesa, isolated by VHS, 2011, CBS 143059 = VHS 25244; VHS 25241; MUCC806; MUCC807; Esperance, from stream baiting within native vegetation, 2008, D. Hüberli, MUCC768 and MUCC769; Ravensthorpe form rhizosphere of mixed native vegetation, 2008, VHS, VHS 19278

Hosts and distribution

NOT FOUND as of June 22, 2018 in U.S. National Fungus Collections Nomenclature Database.

Additional references and links

  • Phytophthora DATABASE: Phytophthora condilina
  • EPPO-Q-bank: Phytophthora condilina
  • SMML USDA-ARS: Phytophthora condilina
  • EPPO Global Database: Phytophthora condilina
  • CABI Invasive Species Compendium: Phytophthora condilina
  • Encyclopedia of Life (EOL): Phytophthora condilina
  • Index Fungorum (IF): Phytophthora condilina
  • Plantwise Knowledge Bank: Phytophthora condilina

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