Biscogniauxia atropunctata (Schwein.: Fr.) Pouzar

TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES

CULTURES AND ANAMORPH

Colonies on 2% Difco oatmeal agar at ca. 20C and under 12 h fluorescent light reaching the edge of 9 cm Petri dish in 1 wk, at first white, felty, azonate, with diffuse and ropy margins, becoming floccose, with greenish olivaceous (90) or dull green (70) patches. Reverse dull green (70) or greenish olivaceous (90).

Sporulating regions scattered over entire surface of colony, whitish.

Conidiogenous structure with branching pattern varying from Nodulisporium-like to Periconiella-like as defined in Ju and Rogers (1996).

Conidiophores hyaline to yellowish, smooth, frequently borne on aerial hyphae, composed of a short main axis, 2.5-4 mm broad, and sometimes one or more major branches, the branches terminating with two to three conidiogenous cells arising in whorls from the main axis and/or from major branches; additional branches infrequently produced.

Conidiogenous cells ovate to short cylindrical, hyaline, smooth, 5-10 x 3.5-4.5 mm, bearing poroid conidial secession scars on apical region, with apices becoming distorted from production of numerous conidia. Conidia produced holoblastically in sympodial sequence.

Conidia hyaline, smooth, globose to subglobose, 4-5.5 x 3-4.5 mm, with flattened base indicating former point of attachment to conidiogenous cell.