Erysiphe miyabei (E. S. Salmon) U. Braun & S. Takam. [2000037]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-31). Data set reviewer(s): Schubert K. (06-03-02); revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Synonyms: Uncinula miyabei (E. S. Salmon) Sacc. & Syd.; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Uncinula salicis var. miyabei E. S. Salmon. Type: Uncinula salicis var. miyabei E. S. Salmon.

Taxonomic Literature: Taxonomic notes: +appressoria lobed, single or pairs, opposite;+conidiophores foot-cells straight or often curved to flexuous, followed by 1-2 shorter cells;+ascomata outer wall cells obscure, polygonal, ca. 8-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [536-538] (1987).

Biogeography: Continent: Asia-Temperate. Region(s): Far Eastern Asia and China. Country or state(s): Japan and Korea (North & South).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Alnus japonica Steud.; Alnus, Betulaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, (.07)-.085-.13-(.15) mm in diam.. Margin: External filaments present (uniformly wide throughout or slightly expanded upwards, but often narrowed below the hooked part; apex often narrowed towards the tip); uncinate, circinate, or sub-helicoid (sometimes), 1-2 µm long, 5-7.5 µm in diameter, hyaline or pigmented (sometimes at the very base), numerous, (9)-15-40-(75) per mm², growing more or less between the lower and upper hald of the ascocarp, flexuose (often abruptly bent in the upper half), smooth or rough, thin or moderatly thick (towards the base), not ramified or ramified (seldom forked), aseptate or septate (with a single septum at the base).

Asci: 3-11 asci per ascocarp, not stipitate or indistinctly stipitate, (40)-45-65-(70) µm long, 25-50-(55) µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores (4)-5-6-(7) per ascus, subglobose, ellipsoid, or ovoid, 16-30 µm long, 10-17 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched; basal cells 25-40 µm long, 6-11 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Cylindrical; macroconidial, not branched, 26-36 µm long, 11-16 µm wide; aseptate.

(report generated 04.Okt.2007)