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Erysiphe carpinicola (Hara) U. Braun & S. Takam. [2000013]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-31). Data set reviewer(s): Schubert K. (06-02-28); revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Synonyms: Uncinula carpinicola (Hara) Hara; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Uncinula geniculata var. carpinicola Hara. Type: Uncinula geniculata var. carpinicola Hara.

Taxonomic Literature: Taxonomic notes: +peridium dark brown, multilayered, ascomata outer wall cells polygonal, rounded in outline to irregularly shaped (walls more or less sinuous), ca. 8-20 µm diam.; mycelium ectophytic, forming distinct patches, inconspicuous on the lower leaf surface, often conspicuous above, evanescent to subpersistent; hyphae branched, septate, 2.5-6 µm wide, hyaline, smooth, thin-walled; appressoria nipple-shaped to lobed, usually solitary, 4-8 µm diam.; anchor hyphae present, about 20-30 per chasmothecium. Braun U., Beih. Nova Hedwigia 89: 1-700 [530] (1987); Braun U. et al., Mycological Progress 5: 139-153 (2006).

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

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous (mainly) or amphigenous. Host or Phorophyte Taxonomy: Carpinus distegocarpus Koidz. (= C. japonica); Carpinus, Corylaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid (chasmothecia), orbicular (subglobose, sometimes slightly flattened at the base), forming independently from the host thallus or mycelium, scattered or in loose groups, (.065)-.08-.12-(.13) mm in diam.. Margin: External filaments present (1-2(3) times as long as the chasmothecial diam., becoming gradually thicker towards the apex, but distinctly decreasing in width at the coiled apex); not interlaced, circinate (closely; not enlarged) or sub-helicoid, 90-200 µm long, 4-7.5 µm in diameter, hyaline, numerous, (10)-15-35-(45) per mm², growing more or less between the lower and upper hald of the ascocarp, flexuose, stiff and straight, or somewhat geniculate (bent) (curved or somewhat sinuous, but not characteristically arched, rarely geniculate), smooth or rough (particularly in the lower half), thin or moderatly thick (mostly towards the base, at least when fully mature, becoming gradually thinner towards the tip), not ramified, aseptate or septate (0-1-septate).

Asci: 4-10-(13) asci per ascocarp, globose (broadly ellipsoid-saccate, ovoid), not stipitate or indistinctly stipitate, 30-55 µm long, 5-40 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores (4)-7-8 per ascus, broadly ellipsoid or ovoid, 13-20 µm long, 9-12 µm wide; septa absent; wall hyaline.

Conidiomata: Present.

Conidiophores: Pseudoidium-type; not branched (foot cells more or less cylindrical, straight to curved or somewhat flexuous-sinuous at the base, followed by one to two shorter cells, sometimes by a single cell of about the same length); conidiophore cells 40-100 µm long, basal cells 30-65 µm long, (5)-6-9-(10) µm wide. Conidium Formation: Conidiogenous cells single or in chains (occasionally adhering in short chains). Conidia: Obovoid (primary conidia), doliiform, or cylindrical; macroconidial (l/w ratio 1.5-2.5), not branched, 20-30 µm long, 9-14 µm wide; aseptate; without distinct fibrosin body fibrosin bodies.

(report generated 04.Okt.2007)

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