Genus Cercospora in Thailand: Taxonomy and Phylogeny (with a ...

Fig. 59 – Line drawings of Cercospora
scharifii on Rosa hybrida. a. Conidia. b.
Conidiophores. Bars: a = 25 μm, b = 50 μm.
(Meeboon 2009).
C. apii s. lat. This species was first reported
from Thailand by Meeboon (2009).
Literature – Hsieh & Goh (1990, p. 327–
329).
Rosaceae
Cercospora scharifii Petr., Sydowia 10: 14
(1957) [1956]. Fig. 59
Leaf spots 3–8 mm diam., amphigenous,
circular to subcircular, brown, with dark brown
to blackish margin. Caespituli amphigenous.
Stromata lacking. Conidiophores 30.5–141 ×
3–5 μm, 4–9 in loose fascicules, 1–6-septate,
arising from stomata, straight to decumbent,
unbranched, cylindrical, smooth, brown at the
base, paler toward the apex, geniculate, mostly
near the apex. Conidiogenous cells integrated,
terminal or intercalary, sympodially proliferating.
Conidiogenous loci 1.5–2.5 μm diam.,
conspicuous, thickened and darkened. Conidia
25–38.5 × 3.5 μm, solitary, obclavate, straight,
hyaline, 4–5-septate, smooth, obconically truncate
at the base, tapering toward a subacute
apex, hila 1.5–2 μm diam., thickened and
darkened.
Specimen examined – THAILAND,
Chiang Mai Province, Mae Jam District, Mae
76
Hae Royal Project Area, on leaves of Rosa
hybrida E.H. L. Krause (Rosaceae), 12
February 2008, Jamjan Meeboon and Iman
Hidayat (BBH 23671).
Hosts – Rosa sp., Rosa hybrida
(Rosaceae) (Crous & Braun 2003, Meeboon
2009).
Distribution – Iran, Thailand (Crous &
Braun 2003, Meeboon 2009).
Notes – Cercospora scharifii was first
reported from Thailand by Meeboon (2009).
Rubiaceae
Cercospora coffeicola Berk. & M.A. Curtis,
Grevillea 9: 99 (1881).
= Cercospora coffeae Zimm., Ber.
Land-Forstw. Deutch-Oatafr. 2: 35 (1904).
= Cercospora herrerana Farneti, Atti Ist.
Bot. Univ. Pavia, Ser. 2, 9: 37 (1911). Fig. 60
Leaf spots 5–8 mm diam., amphigenous,
circular to subcircular, brown to dark brown,
pale at the center, with dark margin. Caespituli
amphigenous. Stromata 16.5–31 μm diam.,
substomatal to intraepidermal, small, composed
of a few globose and brown-walled cells.
Conidiophores 20–140 × 2.5–5 μm, 9–23 in
loose to dense fascicules, divergent, 2–7-septate,
arising from stomata, straight, mostly near
the apex, smooth, brown at the base, paler
toward the apex, unbranched, cylindrical,
geniculate. Conidiogenous cells integrated,
holoblastic, polyblastic, sometimes monoblastic,
terminal or intercalary, sympodially
proliferating. Conidiogenous loci 2–2.5 μm
diam., conspicuous, thickened and darkened.
Conidia 35–178 × 3–4 μm, solitary, obclavate,
straight, slightly curved, hyaline, 4–21-septate,
smooth, obconically truncate at the base, tapering
toward a subacute apex, hila 2–2.3 μm
diam., thickened and darkened.
Specimen examined – THAILAND,
Chiang Mai Province, Mae Jam District, Mae
Hae Royal Project Area, on leaves of Coffea
arabica L. (Rubiaceae), 12 February 2008,
Jamjan Meeboon and Iman Hidayat (BBH
23600).
Hosts – Coffea arabica, C. canephora, C.
excelsa, C. laurina, C. liberica, C. robusta, C.
stenophylla, Coffea spp. (Rubiaceae) (Crous &
Braun 2003).