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Golovinomyces cichoracearum var. transvaalensis (G. J. M. Gorter & Eicker) U. Braun

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-03-28); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: variety. Synonyms: Erysiphe cichoracearum var. transvaalensis G. J. M. Gorter & Eicker; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Erysiphe cichoracearum var. transvaalensis G. J. M. Gorter & Eicker. Type: Erysiphe cichoracearum var. transvaalensis G. J. M. Gorter & Eicker.

Taxonomic Literature: Taxonomic notes: This variety differs from other varieties by the appendages, see below.+ascomata outer wall cells irregularly shaped, ca. 8-25 µm diam., occasionally 30 µm;+appressoria nipple-shaped, sometimes with crenulate surface, rarely somewhat lobed, one appressorium per cell or opposite or several in a series;. Braun U., Beih. Nova Hedwigia 89: 1-700 [248-252] (1987); Bagyanarayana G., Srinivasulu U., J. Indian Bot. Soc. 80: 133-137.

Biogeography: Continent: Africa. Region(s): Southern Africa (South Africa, endemic).

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, amphigenous. Host or Phorophyte Taxonomy: Dahlia sp.; Dahlia, Compositae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, (.065)-.085-.16-(.2) mm in diam.. Margin: External filaments present; mycelioid, straight, .5-2-(4) µm long, (3)-4-9-(12) µm in diameter, hyaline or pigmented (pale to deep brown throughout, sometimes faintly coloured or brown in the basal half and paler or hyaline in the upper half), numerous, growing at the ascocarp base or on the upper half of the ascocarp (frequently), smooth, thin, not ramified (mostly), septate.

Asci: 5-25 asci per ascocarp, not stipitate or distinctly stipitate (mostly), (34.1)-50-80-(90) µm long, (20)-25-45-(55) µm wide; dehiscence unitunicate.

Ascospores: 1–2 to c. 8 per ascus, spores 2-3-(4) per ascus, subglobose, oval, ellipsoid, or ovoid, 18-30 µm long, 11-20-(21.7) µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Euoidium-type; not branched. Conidium Formation: Conidiogenous cells in chains. Conidia: Macroconidial, not branched; aseptate.

(report generated 04.Okt.2007)

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