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Erysiphe berberidis var. asiatica (U. Braun) U. Braun & S. Takam.

Data Set Maintenance: Data set compiled and standard item; reviewer(s): Schubert K. (06-01-25); not revised (00-08-04).

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: variety. Synonyms: Microsphaera berberidis var. asiatica U. Braun; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Microsphaera berberidis var. asiatica U. Braun. Type: Microsphaera berberidis var. asiatica U. Braun.

Taxonomic Literature: Taxonomic notes: This variety differs from var. berberidis by relatively short cleistothecial appendages, they are only 1-2, mostly 1 - 1,5 times as long as the cleistothecial diam. Furthermore, the apex of the appendages rather closely and regulary branched.+conidiophores foot-cells cylindric, slender, followed by 1(-2) shorter cells, cells sometimes about as long as the foot-cell;+appressoria nipple-shaped to lobed;+ascocarp outer wall cells irregularly polygonal, ca. 8-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [330-331] (1987).

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

Ecology: Biotroph; phytopathogenic; growing on stems, leaves, or fruits (sometimes; +sometimes in stems (2)), epiphyllous (mostly) or amphigenous. Host or Phorophyte Taxonomy: Berberis amurensis var. japonica (Regel) Rehder; Berberis, Berberidaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .08-.13 mm in diam.. Margin: External filaments present; setiform, straight (tips of the ultimate branchlets not recurved), 1-1.5-(2) µm long, 7-12 µm in diameter, few or numerous, 5-20 per mm², growing between the lower and upper hald of the ascocarp, flexuose or stiff and straight, smooth or rough, thin, moderatly thick, or thick (towards the base, sometimes moderately thick-walled throughtout), ramified, dichotomously branched (3-5 times, rahter closely and regular branched), aseptate.

Asci: 4-10 asci per ascocarp, not stipitate or indistinctly stipitate, 40-60 µm long, 25-40 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores 3-5-(6) per ascus, ellipsoid or ovoid, 16-25 µm long, 9-14 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched; basal cells 20-35-(45) µm long, 6-8.7 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Cylindrical (both ends rounded, slender); macroconidial (germ tubes arising form an end of the spore, short to moderately long, simple or with lobed appressorium), not branched, rounded at both ends, 27-48 µm long, 9-15.5 µm wide; aseptate.

(report generated 04.Okt.2007)

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