Phytophthora quercetorum sp. nov., a novel species isolated from eastern and north-central USA oak forest soils.
Isolates belonging to an undescribed Phytophthora species were frequently recovered during an oak forest soil survey of Phytophthora species in eastern and north-central USA in 2004. The species was isolated using an oak leaf baiting method from rhizosphere soil samples collected from Quercus rubra, Q. macrocarpa, and Q. phellos. This species is formally described as P. quercetorum. It is homothallic and has aplerotic oogonia and paragynous antheridia. It produces papillate sporangia (occasionally bipapillate) of ovoid-elongated shapes. Its temperature optimum for growth is ca 22.5 degrees C with the upper limit of ca 32.5 degrees C. P. quercetorum differs from the morphologically related P. quercina in producing distinct submerged colony-patterns, different growth-temperature requirements, and oogonial shapes and sizes. Phylogenetic analyses using seven nuclear loci supported P. quercetorum as a novel species within clade 4, closely related to P. arecae, P. palmivora, P. megakarya, and P. quercina.
West Virginia University, Division of Plant and Soil Sciences, 1090 South Agricultural Sciences Building, Morgantown, WV, USA. yibalci@mail.wvu.edu
Yilmaz
Y
Balci
Selin
S
Balci
Jaime E
JE
Blair
Sook-Young
SY
Park
Seogchan
S
Kang
William L
WL
Macdonald
D004463:Ecology; D005656:Fungal Proteins / Q000235:genetics / Q000378:metabolism; D008969:Molecular Sequence Data; D010802:Phylogeny; D010838:Phytophthora / Q000145:classification / Q000235:genetics / Q000302:isolation & purification* / Q000502:physiology; D029963:Quercus / Q000382:microbiology*; D012988:Soil Microbiology; D013172:Spores, Fungal / Q000737:chemistry / Q000166:cytology; D014197:Trees / Q000382:microbiology*; D014481:United States
D005656:Fungal Proteins