Gaeumannomyces hyphopodioides Hern.-Restr. & Crous, Stud. Mycol. 83: 40 (2016).
MycoBank: MB816897.
Morphological description: On PDA, mycelium consisting of septate, branched, smooth, hyaline to red brown, 1–4 μm diam hyphae. Conidiophores differentiated, branched often verticillate, brown, sometimes reduced to conidiogenous cells. Conidiogenous cells phialidic, terminal or intercalary, hyaline to pale brown, cylindrical to lageniform, straight or curved, 7–21 × 2–4 μm, with a cylindrical to funnel-shaped collarette, up to 2.5 μm long, 1–2.5 μm diam. Conidia lunate, slightly to strongly curved, fusiform, allantoid, hyaline, 5.5–10.5 × 1–2 μm. Hyphopodia lobed, dark brown, 17–28 × 18–25 μm (Hernández-Restrepo et al. 2016).
Culture characteristics: After 7 d at 25 °C: On PDA reaching 85 mm diam, aerial mycelium abundant, cottony, white to grey, submerged mycelium hazel, olivaceous, dull green, margin effuse, rhizoid; reverse centre cinnamon, hazel, dark green, grey olivaceous, umber, dark olivaceous, colourless to the periphery. On MEA reaching 35–65 mm diam, aerial mycelium moderate, cottony, white to pale mouse grey, submerged mycelium grey to olivaceous grey, margin effuse; reverse dark (fuscous, olivaceous grey, dark brown). On OA reaching 20–55 mm diam, aerial mycelium scarce, white to grey, submerged mycelium grey, olivaceous black, margin effuse, rhizoid; reverse dark (olivaceous grey) or pale olivaceous, mouse grey, colourless to the periphery (Hernández-Restrepo et al. 2016).
Specimens examined: Australia, New South Wales, isolated from Pennisetum clandestinum, 24 Oct. 1977, unknown collector, CPC26267. Germany, Monheim, isolated from Triticum aestivum, seedling, unknown date, isol. A. Walz, CBS541.86. Poland, Pulawy, isolated from wheat, 18 Oct. 1979, unknown collector, CPC26252. UK, Butt Furlong, Woburn, Beds, isolated from oats, 27 Apr. 1983, unknown collector, CPC26250; Essex, isolated from Zea mays, root, May 1972, J.W. Deacon G6 (holotype, CBS H-22582; culture ex-type, CBS350.77 = ATCC28234 = IMI187786); Hertfordshire, Fosters West, RRes, isolated from wheat, 11 Oct. 1985, unknown collector, CPC26247 = CBS141388; 29 Sep. 1989, unknown collector, CPC26248; CPC26249; West Barnfield, RRes, isolated from winter wheat, 9 Feb. 1990, unknown collector, CPC26264 = CBS141389; CPC26265 (Hernández-Restrepo et al. 2016).
Hosts/substrates: From Avena sp., Pennisetum clandestinum, Triticum aestivum, and Zea mays.
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: Australia, New South Wales. Germany, Monheim. Poland, Pulawy. UK, Butt Furlong, Essex, Hertfordshire, West Barnfield.
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.