A new species of Phoma causes ascochyta blight symptoms on field peas (Pisum sativum) in South Australia.
Phoma koolunga sp. nov. is described, having been isolated from ascochyta blight lesions on field pea (Pisum sativum) in South Australia. The species is described morphologically and sequences of the internal transcribed spacer region compared with those of the accepted pathogens causing ascochyta blight of field peas. P. koolunga was distinct from Mycosphaerella pinodes (anamorph: Ascochyta pinodes), Phoma medicaginis var. pinodella and Ascochyta pisi. Under controlled conditions the symptoms on pea seedlings caused by P. koolunga were indistinguishable from those caused by M. pinodes, other than a 24 h delay in disease development. Isolates of P. koolunga differed in the severity of disease caused on pea seedlings.
Davidson
J A
JA
South Australian Research and Development Institute, GPO Box 397, Adelaide, South Australia 5001, Australia. davidson.jenny@saugov.sa.gov.au
Hartley
D
D
Priest
M
M
Herdina
M Krysinska-Kaczmarek
MK
McKay
A
A
Scott
E S
ES
D001203:Ascomycota / Q000145:classification* / Q000235:genetics / Q000254:growth & development; D021903:DNA, Ribosomal Spacer / Q000235:genetics; D008969:Molecular Sequence Data; D018532:Pisum sativum / Q000382:microbiology*; D010802:Phylogeny; D036226:Seedlings / Q000382:microbiology; D013021:South Australia; D013045:Species Specificity; D013172:Spores, Fungal / Q000166:cytology
D021903:DNA, Ribosomal Spacer