Magnaporthiopsis rhizophila (D.B. Scott & Deacon) J. Luo & N. Zhang, Mycologia 105(4): 1025 (2013).
MycoBank: MB802975.
≡ Magnaporthe rhizophila D.B. Scott & Deacon, Trans. Br. mycol. Soc. 81(1): 77 (1983).
Ascomata perithecial, superficial solitary to gregarious, black, 400–500 µm diam, with a cylindrical, black neck, up to 600 µm long, 100–200 µm wide. Paraphyses unbranched, septate, hyaline, dissolving at maturity. Asci 8-spored, unitunicate, clavate to cylindrical, 80–100 × 8–12 µm, with a refractive ring. Ascospores biseriate, fusiform, slightly curved, 3-septate, not constricted at septum, hyaline, smooth, 24–28 × 6–8 µm. Asexual state phialophora-like. On PDA, hyphae branched, septate, hyaline, brown to olivaceous brown, smooth, 3–5 µm diam. Conidiophores micronematous, solitary, erect, straight or curved, unbranched or sparsely branched, hyaline, smooth. Conidiogenous cells phialidic, erect, terminal or intercalary, hyaline, smooth, 6–18 × 3–6 µm. Conidia aggregated in slimy heads, ovoid to ellipsoidal, straight or slightly curved, aseptate, hyaline, smooth, 6–20 × 2–6 µm.
Colonies on PDA 8 cm diam after 10 days at 28 °C; surface thin, floccose, grey brown to olivaceous black; marginal hyphae curling back strongly towards center of colony (Description from Scott and Deacon, 1983).
Typification: Holotype PREM45952. Ex-holotype culture PREM45952.
Gene sequences: JF414858 (18S), JF414834 (ITS), JF414883 (28S), JF710384 (MCM7), JF710432 (RPB1), JF710408 (TEF1).
Genome sequences: SRX798599 (genome), SRX798627 (transcriptome).
Hosts/substrates: From roots of Cynodon dactylon, Panicum virgatum, Poa pratensis, and Triticum aestivum (Poaceae).
Distribution: Australia, South Africa, USA.
Notes: This species causes root disease of Cynodon dactylon (Bermuda grass), Poa pratensis (Kentucky bluegrass), and Triticum aestivum (wheat). It was also isolated from Panicum virgatum (switchgrass).
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.