Macgarvieomyces juncicola

Figure. Macgarvieomyces juncicola (CBS610.82). A. Colony sporulating on OA. B–G. Conidiophores and conidia forming on SNA. H. Conidia. Scale bars = 10 μm. Pictures from Klaubauf et al. (2014).

Macgarvieomyces juncicola (MacGarvie) Klaubauf, M.-H. Lebrun & Crous, Stud. Mycol. 79: 107 (2014).
MycoBank: MB810209.
        ≡ Pyricularia juncicola MacGarvie, Scientific Proc. R. Dublin Soc., Ser. B 2(no. 16): 155 (1968).

Asexual state pyricularia-like. On CMA with sterile rice seeds, hyphae branched, septate, hyaline, smooth, 1.5–2.5 μm diam. Conidiophores macronematous, solitary, erect, unbranched, straight to curved, septate, medium brown, smooth, 90–180 × 3–5.5 μm. Conidiogenous cells integrated, terminal to intercalary, medium brown, 65–160 × 3–5 μm, with several protruding denticles, 1.5–2 × 1–1.5 μm. Conidia solitary, narrowly obclavate, 0–1-septate, hyaline, smooth, 20–30 × 4–5.5 μm, with a flat, truncate hilum, 1–1.5 μm diam. Sexual state unknown.

Colonies on PDA after 7 days at 25 °C in dark white with buff center, round, flat, with fringed edge; reverse white with buff center. Colonies on MEA 2.6 cm diam after 7 days at 25 °C in dark; surface isabelline with pale olivaceous grey central mycelium, slightly raised wool-like texture, round, hairy edge; reverse iron grey. Colonies on CMA and OA after 7 days at 25 °C in dark olivaceous to grey olivaceous, flat, with smooth, velutinous surface, and undulate edge (Description from Klaubauf et al., 2014).

Typification: Unknown.

Gene sequences: KM009213 (18S), KM484855 (ITS), KM484970 (28S), KM485171 (ACT), KM485240 (CAL), KM009177 (MCM7), KM485071 (RPB1) KM009201 (TEF1).

Genome sequences: SRX798624 (transcriptome).

Specimens examined: The Netherlands, on stem base of Juncus effusus, 3 Nov. 1982, G.S. de Hong, culture CBS610.82.

Hosts/substrates: On leaf spots on Juncus effusus (Juncaceae).

Distribution: Ireland, The Netherlands.

Copyright 2022 by The American Phytopathological Society. Reproduced, by permission, from Luo, J., and Zhang, N. 2022. The Rice Blast Fungus and Allied Species: A Monograph of the Fungal Order Magnaporthales ( American Phytopathological Society, St. Paul, MN.