Name and publication
Phytophthora abietivora D.W. Li, N.P. Schultes, J. A. LaMondia, R. S. Cowles (2019)
Li DW, Schultes NP, LaMondia JA, Cowles RS. 2019. Phytophthora abietivora, a new species isolated from diseased Christmas trees in Connecticut, USA. Plant Disease 18 (103): 3057–3064.
Latin, abies, referring to conifer genus Abies and -vora, ones that eat
Type: USA, Connecticut, Brooklyn, Allen Hill Farm (41°45.997′N 71°55.182′W), from infected root of a Christmas tree of Abies fraseri (Pursh) Poir., 10 October 2017, R.S. Cowles, UAMH 12075 (RC2017-1). Holotype specimen is a living specimen being maintained via lyophilization at UAMH Centre for Global Microfungal Biodiversity, The Gage Research Institute, Toronto, Canada.
Ex-type: culture NRRL66892
Sequences for ex-type in original manuscript: ITS MK163944, cox1 MK164270, β-tubulin MK164274, nadh1 MK164269, hsp90 MK164275
Position in ITS phylogenetic tree
Colonies and cardinal temperatures
No information on morphology or cardinal temperature in manuscript.
Conditions for growth and sporulation
Sporangia were non-papillate, non-caducous and predominantly ovoid in shape with internal nested proliferation. Sporangia averaged 33.5 x 25.1 µm (overall range 27.1–41.8 x 17.1–30.8 µm). Sporangiophores unbranched. Hyphal swellings present. Chlamydospores present.
Homothallic. Oogonia size ranged from 32.1–55.5 µm. Oospores plerotic to slightly aplerotic, thick-walled, size ranged 26.5–42.5 µm. Oospores often aborted after formation of the walls. Antheridia paragynous.
Most typical characters
Hosts and distribution
Distribution: USA; Connecticut
Disease note: root rot of young Abies fraseri
Host: Abies fraseri
Additional references and links
Fact sheet author
Treena Burgess, Ph.D., Phytophthora Science and Management, Harry Butler Institute, Murdoch University