Erysiphe australiana (McAlpine) U. Braun & S. Takam. [2000010]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-31). Data set reviewer(s): Schubert K. (06-02-28); revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Synonyms: Uncinuliella australiana (McAlpine) R. Y. Zheng & G. Q. Chen; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Uncinula australiana McAlpine. Type: Uncinula australiana McAlpine.

Taxonomic Literature: Taxonomic notes: +appressoria multilobed;+conidiophores foot-cells straight or slightly flexuous at the base, followed by (1-)2(-3) shorter cells;+ascomata outer wall cells irregularly polygonal, ca. 6-20 µm;. Braun U., Beih. Nova Hedwigia 89: 1-700 [548] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Africa, Asia-Temperate, Australasia, Europe (introduced in southern Europe, only the anamorphic state), Northern America, and Southern America (Argentina). Region(s): Southern Africa (South Africa), Far Eastern Asia, China, Australia, and New Zealand. Country or state(s): United Kingdom, Poland, Spain (incl. Andorra & Monaco), Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia), and Ukraine; Japan, Korea (North & South), and Taiwan; Hawaii (USA); Oklahoma (USA), Texas (USA), Alabama (USA), Georgia (USA), Louisiana (USA), Maryland (USA), South Carolina (USA), Virginia (USA), and District of Columbia (USA). Checklist records: United States and Canada (continental).

Ecology: Biotroph; phytopathogenic; growing on stems, leaves, or inflorescences (sometimes), amphigenous. Host or Phorophyte Taxonomy: Lagerstroemia indica L.; Lagerstroemia, Lythraceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, (.07)-.09-.125-(.14) mm in diam.. Margin: External filaments present (two types of appendages: long ones (see description below) and short ones in the uper half of ascomata, ca. 10-25 in number, ca. 10-20 x 2.5-5 µm, bristle like, subcylindric or narrowed upwards, straight or curved, thin-walled, hyaline, aseptate, smooth to rough); uncinate (closely; apex not enlarged), circinate, or sub-helicoid, 1-2 µm long, (3)-5-9-(10) µm in diameter, hyaline or pigmented (brown in the lower half), numerous, (5)-10-25-(30) per mm², growing more or less between the lower and upper hald of the ascocarp (width of appendages subequal throughout or slightly narrowed upwards; sometimes with oil drops), flexuose (and straight, curved or undulate), stiff and straight, or slightly geniculate (bent), smooth or rough (rarely), thin or moderatly thick (towards the base), not ramified, septate (1-3(-4)-septate).

Asci: 3-5 asci per ascocarp, not stipitate or indistinctly stipitate, 40-60 µm long, 30-40 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores 5-7-(8) per ascus, ellipsoid or ovoid, 18-22-(25.5) µm long, 10-15 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched; basal cells 25-30-(55) µm long, (5)-6-10 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid, ovoid (primary conidia), or cylindrical; macroconidial (germ tubes at an end of the spore, straight to flexuous, either short and immediately producing one or two multilobed appressoria or moderately long, ending in a lobed or unlobed appressorium), not branched, (25)-28-40-(47) µm long, (12)-13-18-(20) µm wide; aseptate.

(report generated 04.Okt.2007)