Golovinomyces magnicellulatus var. robustus (R. Y. Zheng & G. Q. Chen) U. Braun [2000189]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-21). Data set reviewer(s): Schubert K. (06-02-22); revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: variety. Synonyms: Erysiphe magnicellulata var. robusta (R. Y. Zheng & G. Q. Chen) U. Braun; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Erysiphe robusta R. Y. Zheng & G. Q. Chen. Type: Erysiphe robusta R. Y. Zheng & G. Q. Chen.

Taxonomic Literature: Taxonomic notes: This variety differs from var. magnicellulata by size of peridial cells and the width of the cleistothecial appendages, see below;+conidiophores erect, foot-cells cylindric, followed by 1-3 shorter cells;+appressoria nipple-shaped;+ascocarp outer wall cells very large, 10-40 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [222-243] (1987).

Biogeography: Continent: Asia-Temperate. Region(s): Far Eastern Asia and China.

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, amphigenous. Host or Phorophyte Taxonomy: Polemonium chinense Brand; Polemonium, Polemoniaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, in loose groups or gregarious, .08-.16-(.18) mm in diam.. Margin: External filaments present; interlaced with each other or interwoven with surrounding mycelium, mycelioid, straight, .5-2.5-(4) µm long, (4)-6-13-(18) µm in diameter, hyaline or pigmented (later, brown throughout or paler in the upper part), numerous, growing all across the lower half of the ascocarp or on the upper half of the ascocarp (rarely partly), smooth, thin, not ramified or ramified (rarely), septate.

Asci: 10-25 asci per ascocarp, indistinctly stipitate, 40-85 µm long, 25-50 µm wide; dehiscence unitunicate (asci numerous).

Ascospores: 1–2 to c. 4 per ascus, spores 2-3-(4) per ascus, subglobose, ellipsoid, or ovoid, (16)-18-29-(31) µm long, 13-20 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Euoidium-type; not branched. Conidium Formation: Conidiogenous cells in chains. Conidia: Ellipsoid or cylindrical; macroconidial, not branched, 26-35 µm long, 14-18 µm wide; aseptate.

(report generated 04.Okt.2007)