Kretzschmariella culmorum (Cooke) Y.-M. Ju & J. D. Rogers

TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES

CULTURES AND ANAMORPH

Colonies on OMA at ca. 20 C and under 12 h fluorescent light covering 9 cm Petri dish in 4 wk, appressed, azonate, with diffuse margins, white at first, becoming gray when reaching the edge, usually sectored into areas with differing conidial-producing activity. Exudate hyaline. Reverse uncolored.

Stromata scattered, pulvinate, orbicular, gray.

Teleomorph produced in 4 months after entire colony transferred to SMEA and serially to SMEA several times, homothallic, with morphological features as described above. Conidium-bearing regions over entire surface, olivaceous, finely granular.

Conidiophores scattered or aggregated into pustules, unbranched to dichotomously-branched, hyaline, smooth, slightly constricted at septa, 4-5 Ám broad.

Conidiogenous cells hyaline, smooth, 6-20 x 4.5-7 Ám, terminal, indeterminate, with discoid conidial secession scars 1-1.5 Ám high x 1.5-3 Ám broad. Conidia produced holoblastically in sympodial sequence.

Conidia pale brown, usually multicellular, beaked, cylindrical, 60-170 x 6-8 Ám, sometimes one- to several-celled, unbeaked, ellipsoid to oblong-obovate, 8-40 x 4.5-7 Ám, with truncate base 1.5-3 Ám broad indicating former point of attachment to conidiogenous cell.