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Erysiphe pisi DC. var. pisi

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: variety. Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Erysiphe pisi var. pisi DC.

Taxonomic Literature: Taxonomic notes: +appressoria moderately lobed, haustoria ca. 17-25 µm
+conidiophores foot-cells subcylindric or width somewhat
decreasing from base to top, followed by a longer and a shorter cell
or by two shorter cells;
+ascocarp outer wall cells obscure,
irregularly polygonal, 8-25 µm diam.;.
Braun U., Beih. Nova Hedwigia 89: 1-700 [195-197] (1987); Bagyanarayana G., Srinivasulu U., J. Indian Bot. Soc. 80: 133-137.

Biogeography: Nearly cosmopolitan.

Ecology: Biotroph; phytopathogenic; growing on fruits, stems, and leaves, amphigenous. Host or Phorophyte Taxonomy: Leguminosae-Papilionoideae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered and gregarious, (.08)-.085-.15 mm in diam.. Margin: External filaments present; interlaced with each other and interwoven with surrounding mycelium, mycelioid, (.25)-.5-3-(5) µm long, 4-10 µm in diameter, hyaline and pigmented (when mature, brown throughout or paler upwards, sometimes hyaline in the upper half), numerous, growing all across the lower half of the ascocarp, smooth and rough, not ramified and ramified, not branched, septate.

Asci: (3)-4-8-(13) asci per ascocarp, not stipitate and indistinctly stipitate, 40-85 µm long, 25-55 µm wide; dehiscence unitunicate.

Ascospores: 1–2, c. 4, and c. 8 per ascus, spores (2)-3-6 per ascus, ellipsoid and ovoid, (15)-18-25-(28) µm long, 10-16.5 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Oidium-type; not branched; basal cells (15)-20-50-(70) µm long, 6-10 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid and cylindrical; macroconidial (germ tubes on an end, occasionally on a side, short or up to 50 µm in lenght, 2.5-4 µm wide, terminating in an unlobed or moderately lobed appressorium), not branched, 24-55 µm long, (12.4)-13.5-22 µm wide; aseptate; without distinct fibrosin body fibrosin bodies.

(report generated 04.Okt.2007)

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