Phyllactinia salmonii S. Blumer

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-08-02). Data set reviewer(s): Schubert K. (06-03-07); revised.

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

Type Information: Basionym: Phyllactinia salmonii S. Blumer. Type: Phyllactinia salmonii S. Blumer.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells obscure, irregularly polygonal to rounded, 13-30 µm diam., not distinct; +vegetative hyphae substraight to somewhat wavy, 50-110 × 6-9 µm, mostly branching at right angle, with a septum near the branching point; +appressoria well-developed, nipple- to hook-shaped, sometimes branched, or rod-shaped to hypha-like, usually single. Braun U., Beih. Nova Hedwigia 89: 1-700 [589] (1987); Shin H. D., Erysiphaceae of Korea. 1-320 [191]. Suwon, Korea (2000);.

Biogeography: Continent: Asia-Temperate. Region(s): China. Country or state(s): Japan, Korea (North & South), and Taiwan.

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous (mostly). Host or Phorophyte Taxonomy: Paulownia imperialis Siebold & Zucc.; Paulownia, Bignoniaceae.

Reproduction Strategy: With sexual (and possible asexual) stages (penicillate cells crowded on the upper part of the ascoma, 55-85(-90) x 12-26 µm, stems 8-13 µm wide and usually not bifurcate at the upper portion, filaments shorter than stems in length). Ascocarps: Cleistothecioid (blackish brown), orbicular (depressed globose), forming independently from the host thallus or mycelium, scattered or in loose groups, (.25)-.3-.38-(.4) mm in diam.. Margin: External filaments present; not interlaced, straight (acicular with a bulbose base, 40-55 µm wide at the ball, 12-16 µm wide above the ball and gradually narrower upwards, apex 4-8 µm wide and obtuse), (.8)-1-1.3-(1.5) µm long, hyaline (throughout), numerous, 14-26 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight, thick (above the ball and gradually thinner upwards), not ramified, aseptate.

Asci: (12)-15-35 asci per ascocarp, indistinctly stipitate or distinctly stipitate, (75)-80-105-(125) µm long, (25)-32-44-(50) µm wide; dehiscence unitunicate (olivaceous-brown, moderately thick-walled, but slightly thinner at the upper part).

Ascospores: 1–2 per ascus, spores 2 per ascus, ellipsoid or ovoid, 30-50 µm long, 18-26 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Ovulariopsis-type (1-2(-3) on a hyphal cell, sometimes branched at the lower half, arising from the upper part of the creeping hyphae, position mostly central, very long, straight in foot-cells, followed by 3(-4) straight cells, usually lower two cells long, upper cells including an immature conidium short, with a basal septum at 8-25 µm away from the branching point of the mycelium); not branched; conidiophore cells up to 750 µm long, basal cells 5.5-7.5 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Obpyriform (not spatulate, non-papillate at the apex, sometimes becoming narrowed and papilla-like on the end) or clavate; macroconidial (germ tubes on the median side or on the basal part, straight but irregular at the upper portion, 4-5 µm wide and up to 500 µm or longer), not branched, (58)-60-85 µm long, (16)-30-40 µm wide; aseptate; cell wall hyaline (to subhyaline); without distinct fibrosin body fibrosin bodies.

(report generated 04.Okt.2007)