Podosphaera mors-uvae (Schwein.) U. Braun & S. Takam.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Synonyms: Sphaerotheca mors-uvae (Schwein.) Berk. & M.A. Curtis; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Erysiphe mors-uvae Schw.

Taxonomic Literature: Taxonomic notes: +secondary mycelium persistent, forming dense, pannose patches, often
confluent, covering the whole surface of leaves, white, later turning
to brown, persistent mycelium composed of long, setiform, +/- thick-
walled, yellowish to brown hyphae, about 4-9.5 µm wide, smooth
to somewhat rough, sparsely branched and septate;
+conidia germ
tubes arising from a side, moderately long;
+ascoc. outer cell walls
irregularly polygonal, ca. 8-25 µm diam.;
+ascoc. ext. fil.
length variable, mostly about as long as the cleistoth. diam. or
shorter, but sometimes longer, up to 3 times the cleistoth. diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [108] (1987).

Biogeography: Continent: Asia-Temperate, Europe, and Northern America (USA: generally distributed; Canada; introduced in Europe and Asia). Region(s): Siberia. Country or state(s): Japan.

Ecology: Biotroph; phytopathogenic; growing on fruits, stems, petioles, or leaves, amphigenous. Host or Phorophyte Taxonomy: Grossulariaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, not emerging, gregarious (usually), .07-.11 mm in diam.. Margin: External filaments present; interlaced with each other, mycelioid (but rather coarse), up to 3 µm long, 4-10 µm in diameter, hyaline or pigmented (later, brown), few, growing all across the lower half of the ascocarp, smooth or somewhat rough, thin or moderatly thick, not ramified, septate.

Asci: 1 asci per ascocarp, 65-100 µm long, 50-70 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores (4)-8 per ascus, ellipsoid, sub-cylindrical (occasionally pea-shaped), or ovoid, 16-26.5 µm long, 8-15 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Not branched. Conidium Formation: Conidiogenous cells long in chains. Conidia: Broadly ellipsoid, cylindrical, or ovoid; macroconidial, not branched, 18-30 µm long, 11-20 µm wide; aseptate.

(report generated 04.Okt.2007)