Phytopathogenic Dothideomycetes - CBS - KNAW

Verkley et al.
Fig. 10. Septoria astragali, CBS 109116. A–C. Colonies (15 C, nUV). A. On OA. B. On CHA. C. On MEA. D. Conidia and conidiogenous cells on OA (CBS 109116); E–G. Conidia
in planta (CBS H-21258). H. Conidiogenous cells on OA (CBS 123878). I. Conidia on OA (CBS 123878). Scale bars = 10 µm.
walls covered with short mycelial outgrowth, with a single opening
releasing a stout cirrhus of pale whitish to rosy-buff conidial slime;
reverse mostly olivaceous-black due to the conidiomata; after
incubation of 5–7 wk, more of the immersed mycelium darkens
to olivaceous-black, with traces of a red pigment especially near
the margin, and the aerial mycelium becomes more dominant,
white or grey. Colonies on CMA 2–3 mm diam in 10 d (27–28 mm
in 7 wk), as on OA, but the reddish pigment at the margin more
conspicuous in old cultures. Colonies on MEA 1.5–3 mm diam in 10
d ((8–)14–17 mm in 7 wk), with an even to irregular, glabrous, buff
margin; colonies first restricted, while later faster growing hyphal
strands colonize the medium underneath the surface of the agar,
pustulate to hemispherical, the surface first ochreous or amber,
later olivaceous-grey or black covered by fairly dense, short,
white aerial mycelium; some superficial or immersed pycnidial
conidiomata formed, releasing cirrhi of pale buff conidial slime;
reverse dark umber to brown-vinaceous. Colonies on CHA 1.5–3
mm diam in 10 d (15–17 mm in 7 wk), with an irregular margin
which is hardly visible from above; colonies restricted, irregularly
pustulate to hemispherical, the surface dark brick to dark slate
244