Isolate Browser

Isolate ID

 PD_00039 (Phytophthora psychrophila )

Source(s) and alternative IDs

P10433 ( WPC )

Host of origin

N/A

Substrate

 

Geographic origin

 Germany

Pathogenic Race

 

Date of Isolation

 May. 1995

Mating Type

 Unknown

Characteristics

 

Reference

 

Remarks

 Received February 2004, Thomas Jung. Holotype. Location: Schechen, Bavaria. Three new species of Phytophthora from European oak forests Thomas JUNG, Everett M. HANSEN, Lori WINTON, Wolfgang OSSWALD and Claude DELATOUR In several studies of oak decline in Europe, one semi-papillate (Phytophthora psychrophila sp. nov.) and two non-papillate homothallic Phytophthora species (P. europaea and P. uliginosa spp. nov.) were isolated, together with other Phytophthora species, from rhizosphere soil samples which could not be assigned to existing taxa. P. psychrophila differs from other semi-papillate species of Waterhouse's morphological Group IV, like P. ilicis and P. hibernalis, by its uniform, dome-shaped and cottonwool-like colony growth pattern on V8 juice agar and malt extract agar, the occurrence of sympodially branched primary hyphae, the high variation in size and shape of the sporangia, shorter pedicels, lower optimum temperature for growth, and ITS sequences. P. europaea is distinguished from related non-papillate Group V and VI species, namely P. fragariae, P. cambivora, and the ‘alder phytophthora’, by producing oogonia with tapered bases, irregular walls and exclusively paragynous antheridia, its cardinal temperatures for growth, and ITS sequences. P. uliginosa differs from related Group V and VI species by its large oogonia with exclusively paragynous antheridia, the predominant occurrence of ellipsoid sporangia with markedly wide exit pores, its slow growth, low cardinal temperatures, its colony growth patterns, and ITS sequences. P. uliginosa is separated from P. europaea by its larger oogonia without tapering bases, lower cardinal temperatures and growth rates, different colony growth patterns, and greater aggressiveness on Q. robur.

Available marker sequences

Chk	Marker	Sequence	Length
	Beta Tubulin	PD_00039_B-tub	1134 bp
	TEF1(v.2.0)	PD_00039_EF-1a	961 bp
	Enolase	PD_00039_Eno	1176 bp
	Internal transcribed spacer region of rDNA	PD_00039_ITS	790 bp
	60S Ribosomal Protein L10	PD_00039_60S-RPL10	496 bp
	Heat Shock Protein 90	PD_00039_HSP90	1749 bp
	Large Subunit rRNA	PD_00039_28s-rRNA	1340 bp
	TigA gene fusion	PD_00039_Tig	1642 bp
	Mitochondrial cox2 locus	PD_00039_cox2	1042 bp
	Mitochondrial Ribosomal Protein S10	PD_00039_rps10	327 bp
	Mitochondrial NADH Dehydrogenase Subunit 9	PD_00039_nad9	567 bp
	Mitochondrial Sec-Independent Transporter Protein	PD_00039_secY	747 bp
	Mitochondrial cox1 locus	PD_00039_cox1	680 bp