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Erysiphe weigelae Z. X. Chen & S. B. Luo

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Schubert K.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Synonyms: Erysiphe diervillae var. weigelae (Z. X. Chen & S. B. Luo) V. P. Gelyuta; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Erysiphe weigelae Z. X. Chen & S. B. Luo. Type: Erysiphe weigelae Z. X. Chen & S. B. Luo.

Taxonomic Literature: Taxonomic notes: + ascocarp outer wall cells irregularly polygonal, ca. 8-20 µm diam.; vegetative hyphae hyaline, substraight to geniculate, 36-80(-106) × 4-6,5 µm, usually less than 60 µm long when having appressoria and/or conidiophores, mostly branching at right angle, usually with a septum near the branching point; appressoria moderately lobed to multilobed, mostly single; secondary hyphae formed at the later stage of anamorphic state, arising from primary hyphae, occasionally found at the end of generative hyphae (the apical cell of generative hyphae turning into a non-septate secondary hypha), substraigth to curved or even somewhat undulate, smooth, walls thicker than generative hyphae, mostly aseptate, but occasionally having a few inconspicuous septa, individually hyaline, but pale ochre in mass, 160-320 µm or even longer, 3-5 µm wide, but usually becoming wider at the upper part. Braun U., Beih. Nova Hedwigia 89: 1-700 [189] (1987); Shin H. D. & Choi, Y. J., Mycotaxon 86: 269-275 (2003).

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

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, amphigenous. Host or Phorophyte Taxonomy: Weigela japonica var. sibirica (Rehder) Bailey; Weigela, Caprifoliaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular (depressed globose), forming independently from the host thallus or mycelium, gregarious, (.085)-.09-.125-(.14) mm in diam.. Margin: External filaments present; interlaced with each other, mycelioid, circinate or straight, (50)-124-400-(520) µm long, 2.5-8 µm in diameter, hyaline, few or numerous, 5-18-(24) per mm², growing all across the lower half of the ascocarp, smooth or rough, thin or thick (sometimes somewhat thicker below), not ramified, aseptate or septate (occasionally few inconspicuous septa).

Asci: 5-12-(15) asci per ascocarp, globose (ellipsoid), not stipitate or indistinctly stipitate, (55)-60-78-(80) µm long, (28)-30-40-(45) µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 8 per ascus, ellipsoid or ovoid, 15-20-(22.5) µm long, (8)-10-12.5 µm wide; septa absent; wall hyaline (to faintly yellowish).

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched (single or up to three on a hyphal cell, arising from the upper part of mother cells, position mostly central, becoming broader upwards, foot cells straight, slightly constricted at the branching point, followed by (1-)2-3 straight shorter cells, with a basal septum at the branching point of the mycelium); conidiophore cells 45-110 µm long, basal cells 7-10 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid, ovoid, or cylindrical; macroconidial (dimorphic, primary and secondary conidia, primary conidia spathulate, usually smaller than secondary conidia; secondary conidia occasionally guttulate, producing subterminal germ tubes), not branched, (18)-22-38 µm long, 12.5-16-(18) µm wide; aseptate; without distinct fibrosin body fibrosin bodies.

(report generated 04.Okt.2007)

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