Gaeumannomyces fusiformis Hern.-Restr. & Crous, Stud. Mycol. 83: 35 (2016).
MycoBank: MB816895.
Morphological description: On MEA, mycelium consisting of septate, branched, smooth, hyaline to brown, 1.5–5 μm diam hyphae. Conidiophores erect, simple or branched sometimes reduced to conidiogenous cells. Conidiogenous cells phialidic, terminal or intercalary, hyaline, cylindrical, straight to curved, 5–28 × 1.5–5 μm, with a cylindrical, refractive collarette, up to 2.5 μm, 1–2 μm diam. Conidia fusiform, tapering at the base, hyaline, 5–9.5 × 1–2.5 μm. Hyphopodia not observed (Hernández-Restrepo et al. 2016).
Culture characteristics: After 7 d at 25 °C: On PDA reaching 90 mm diam, aerial mycelium cottony, white, submerged mycelium rhizoid, hazel, margin rhizoid; reverse pale isabelline. On MEA reaching 60 mm diam, cottony, aerial mycelium moderate, white to grey, margin effuse; reverse umber in the centre, paler to the periphery. On OA reaching 90 mm diam, aerial mycelium scarce to moderate, cottony to funiculose, white, submerged mycelium olivaceous; reverse isabelline (Hernández-Restrepo et al. 2016).
Specimen examined: USA, Arkansas, isolated from Oryza sativa, 1992, C. Rothrock G-8 (holotype, CBSH-22578; culture ex-type, CBS141379 = CPC26068) (Hernández-Restrepo et al. 2016).
Hosts/substrates: from Oryza sativa (rice).
References:
Hernández-Restrepo M, Groenewald JZ, Elliott ML, Canning G, McMillan VE, Crous PW. 2016. Take-all or nothing. Studies in Mycology 83:19–48.
Geographical distribution: USA, Arkansas.
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 (https://my.apsnet.org/APSStore/Product-Detail.aspx?WebsiteKey=2661527A-8D44-496C-A730-8CFEB6239BE7&iProductCode=46826). American Phytopathological Society, St. Paul, MN.