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Phyllactinia adesmiae Havryl. [2000315]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Schubert K. @EXCL@ Kainz C. (06-03-29).

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Phyllactinia adesmiae Havryl. Type: Phyllactinia adesmiae Havryl.

Taxonomic Literature: Taxonomic notes: + peridia cells irregularly polygonal, ca 8-14(-30) µm diam; +appressoria nipple-shaped; + vegetative hyphae irregular in diameter, 5-7 µm wide. Havrylenko M., Nova Hedwigia 61: 447-455 (1995).

Biogeography: Continent: Southern America (Argentina, Prov. Rio Negro).

Ecology: Biotroph; phytopathogenic; growing on stems (young branches) or leaves, amphigenous. Host or Phorophyte Taxonomy: Adesmia campestris (Rendle) Rowlee; Adesmia, Leguminosae-Papilionoideae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, gregarious (abundant). Margin: External filaments present; not interlaced, straight (acicular, but some with a slender swelling near the bulbous base, bulbous base ca 24-30 × 50-52 µm diam.), up to 1 µm long, hyaline, few or numerous, 4-14 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight, smooth, thin, not ramified, aseptate.

Asci: Clavate (ellipsoid to), distinctly stipitate, 72-94 µm long, 30-40 µm wide; dehiscence unitunicate (numerous).

Ascospores: 1–2 per ascus, spores 2 per ascus, ellipsoid or ovoid, 34-44 µm long, 16-22 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Ovulariopsis-type (composed of a foot-cell and two cells of equal length, foot-cells cylindrical, basal septum away from the supporting branch of mycelium); not branched; basal cells 20-22 µm long, 6-7 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Cylindrical or clavate (13, 24: with a cingulum-like ring at the base); macroconidial (germ tubes simple or branched, subapical, as seen in naturally germinated conidia on leaves), not branched, 40-64 µm long, 12-20 µm wide; aseptate.

(report generated 04.Okt.2007)

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