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Streptopodium tabebuiae Liberato & R. W. Barreto

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Schubert K. @EXCL@ Kainz C. (06-07-26).

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

Type Information: Basionym: Streptopodium tabebuiae Liberato & R. W. Barreto. Type: Streptopodium tabebuiae Liberato & R. W. Barreto.

Taxonomic Literature: Taxonomic notes: +mycelium hemiendophytic (partly external and partly internal), inconspicuous to conspicuous and dense, superficial hyphae emerging through stomata, septate, branched, hyaline, smooth; +appressoria lobed; +conidiophores foot-cells cylindrical, straight, basal septum 12.5-27 μm displaced from the branching point of the mycelium. Liberato J. R. & Barreto R. W., Fungal Diversity 18: 95-106 (2005).

Biogeography: Continent: Southern America (Brazil).

Ecology: Biotroph; phytopathogenic; growing on leaves (chlorotic, irregular, becoming yellow with age, soaked areas corresponding to areas with white to grayish powdery mildew fungal growth abaxially), hypophyllous. Host or Phorophyte Taxonomy: Tabebuia serratifolia (Vahl) G. Nicholson; Tabebuia, Bignoniaceae.

Reproduction Strategy: Only known as sterile, asexually reproducing form.

Conidiomata: Present; hyphomycetous.

Conidiophores: Streptopodium-type; not branched (produced from the external mycelium, unbranched, cylindrical, 160.5-555.5 × 3.5-6 μm, 2-4-septate, hyaline, smooth); basal cells 123.5-261.5 µm long, 5-6 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid, ovoid, or clavate; macroconidial (dimorphic, primary conidia lanceolate, apically pointed, base rounded, 45-74 × 15-27 μm, l/w ratio 2.3-3.5, secondary conidia clavate, ellipsoid to ovoid, 36-69 × 15-29.5 μm, with rounded to truncate ends, l/w ratio 1.7-3.4, smooth; +germ tubes predominantly formed laterally, short (0.5-2 times as long as the conidium), simple, appressoria inconspicuous), not branched, 36-69 µm long, 15-29.5 µm wide; aseptate; cell wall hyaline; without distinct fibrosin body fibrosin bodies.

(report generated 04.Okt.2007)

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