Magnaporthiopsis maydis (Samra, Sabet & Hing.) Klaubauf, M.-H. Lebrun & Crous, Stud. Mycol. 79: 101 (2014).
MycoBank: MB810225.
≡ Cephalosporium maydis Samra, Sabet & Hing., Phytopathology 53: 404 (1963).
≡ Harpophora maydis (Samra, Sabet & Hing.) W. Gams, Stud. Mycol. 45: 192 (2000).
Asexual state phialophora-like. On PDA, hyphae simple or branched, septate, hyaline, smooth. Conidiophores micronematous, solitary, erect, straight or curved, branched, hyaline, smooth, septate, 60–250 µm long. Conidiogenous cells phialidic, erect, terminal or intercalary, hyaline, smooth. Conidia aggregated in slimy heads, ovoid, ellipsoidal to oblong, straight or slightly curved, aseptate, hyaline, smooth, 3.6–14 × 3.3–3.6 µm. Sexual state unknown.
Colonies on MEA and PDA 9 cm diam after 9 days at 22–24 °C (Description from Samra et al., 1963).
Typification: From roots and stems of Zea mays and from soils, Egypt.
Gene sequences: KM009208 (18S), KM009160 (ITS), KM009148 (28S), KM009172 (MCM7), KM009184 (RPB1), KM009196 (TEF1).
Hosts/substrates: From roots and stems of Zea mays (Poaceae) and from soils.
Distribution: Egypt, Hungary, India, Israel, Portugal, Spain.
Notes: Samra et al. (1963) first described the fungus causing late wilt disease on maize in Egypt as Cephalosporium maydis. Based on ITS sequence and morphological characteristics, Gams (2000) transferred it to the asexual genus Harpophora in Magnaporthaceae. Klaubauf et al (2014) later reexamined the fungus and placed it in Magnaporthiopsis.
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.