Phytophthora fluvialis

Name and publication

Phytophthora fluvialis Jung & Burgess (2011)

Jung T, Burgess TI, Huberli D, Hardy GE StJ, and Stukely MJC. 2011. Phytophthora fluvialis. Persoonia 26: 146–147 (pg 147). In: Crous PW, Groenewald JZ, Shivas RG, Edwards J, Seifert KA. 2011. Fungal Planet Description Sheets: 69–91. Persoonia. 26: 108–156.


from Jung et al. (2011)




named for the riparian ecosystems from which all isolates were recovered


Type: WESTERN AUSTRALIA, Moore River, baited from water in native bushland, Dec. 2009, D. Hüberli, holotype MURU 468 (dried culture on V8A in the Herbarium of Murdoch University, Western Australia)

Ex-type: CBS 129424 = MUCC 771

Sequences for ex-type in original manuscript: CBS 129424 = LSU JF951171, NADH JN547682, β-Tubulin JN547595. Strain DH086 = ITS rDNA JF701436, cox1 JF701442, HSP90 JF701439

Ex-type in other collections

CBS 129424 = MUCC 771 = DH086 (D. Hüberli), P19584 (WOC/WPC), CPHST BL 64 (Abad), 55B6 (Yang)

Molecular identification

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

Phytophthora fluvialis isolate CPHST BL 64 (= P19584 WPC) = ITS rDNA MG865491, COI MH136887

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

Clade 6b

Morphological identification

Colonies and cardinal temperatures

Colony morphology is stellate to rosaceous on CA, V8A, and PDA. Minimum growth temperature 10°C, optimum 31.5°C, and maximum 38°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 not observed in single culture or when paired with tester strains.

Asexual phase

Sporangia are nonpapillate, persistent, broad ovoid to elongated ovoid with average dimensions of 53 ± 7.6 × 36.4 ± 6.1 μm (overall range 37–72 × 21–54 μm). Sporangiophores are simple and internal proliferation both nested and extended occurred in chains. Hyphal swellings are ellipsoid and non-catenulate. Chlamydospores absent.

Sexual phase

Sterile in culture.

Most typical characters

Phytophthora fluvialis is in a species cluster with P. amnicola, P. litoralis, P. moyootj, and P. thermophila, all recovered from waterways in Western Australia. Among these species, it has the highest maximum temperature for growth.

Specimen(s) evaluated

Australia; Western Australia, Moore River, baited from water in native bushland, Dec. 2009, D. Hüberli, CBS 129424 = MUCC 771; MUCC 772; Badgingarra, 2007, VHS 17350

CPHST BL 64 = P19584 (WPC)

Hosts and distribution

Distribution: Western Australia
Substrate: isolated from water
Disease note: no pathogenicity trials have been conducted
Hosts: known only from water

Retrieved January 30, 2018 from U.S. National Fungus Collections Nomenclature Database.

Additional references and links

Crous PW, Groenewald JZ, Shivas RG, Edwards J, Seifert KA, Alfenas AC, Alfenas RF, Burgess TI, Carnegie AJ, Hardy GES, Hiscock N, Hüberli D, Jung T, Louis-Seize G, Okada G, Pereira OL, Stukely MJC, Wang W, White GP, Young AJ, McTaggart AR, Pascoe IG, Porter IJ, Quaedvlieg W. 2011. Fungal Planet description sheets: 69–91. Persoonia 26: 108–156.

Jung T, Stukely MJC, Hardy GE StJ, White D, Paap T, and Burgess TI. 2011. Multiple new Phytophthora species from ITS Clade 6 associated with natural ecosystems in Australia: evolutionary and ecological implications. Persoonia 26: 13–39.

Hüberli D, Hardy GE StJ, White D, Williams N, Burgess TI. 2013. Fishing for Phytophthora from Western Australia's waterways: a distribution and diversity survey. Australasian Plant Pathology 42: 251–260.

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