| Authors | (Sacc.) Schrantz 1961 |
|---|---|
| Strain | 12056 |
| Classification | Magnaporthales, Magnaporthaceae, Gaeumannomyces |
| Culture collection | BCRC FU30215 |
| Detection frequency | High |
| Accession number | LC494375 |
| Figure |  Fig. 1 5-day-old colony on PDA  Fig. 2 Gaeumannomyces oryzinus. a. Perithecia. b. Ascomal wall. c, d. Asci. e. Ascospores. f. Hyphopodia on rice leaf sheath (Bars= 5 μm, unless otherwise specified) |
| Colonies | Colonies on PDA growth rapidly, attaining 81-, >90-, 0-mm at 24 °C, 28 °C and 37 °C after 5 days, margins entire, floccose, reverse dark with white margin. |
| Ascomata | Perithecia produced poorly on PDA or CMA, abundant on 0.3% yeast extract agar, dark brown, globose, solitary, superficial or submerge, up to 500 µm in diameter, with cylindrical neck, 40–60 µm wide, up to 300 µm long in culture. |
| Asci | Asci cylindrical, 8-spore, 130–160 × 10–20 µm. |
| Ascospores | Ascospores parallel in ascus, hyaline, cylindrical, with three inconspicuous septa, 90–110 × 3–5 µm. |
| Appressoria | Hyphopodia forming on the wall of polystyrene petri dish or the surface of rice plant, dark brown when mature, lobed, 19–40 μm in diam. |
| Note | This species was first discovered by Saccardo (1916) on rice straw under the name of Ophiobolus oryzinus, which was transferred to Gaeumannomyces by Schrantz (1960). Tullis (1933) did a detailed pathogenic test and found that this species caused rice crown (black) sheath rot. Walker (1972) compared the morphological characteristics and considered Opiobolus oryzinus to be the synonym of Gaeumannomyces graminis , which was originally isolated from Cynodon sp. Hernández-Restrepo et al. (2016) reexamined the classification of Gaeumannomyces and confirmed that Opiobolus oryzinus (= Gaeumannomyces oryzinus) is different from Gaeumannomyces graminis. Therefore, the name, Gaeumannomyces oryzinus, is reintroduced. |
| Pathogenicity | This species causes crown (black) sheath rot on rice (Ou, 1985; Tullis & Adair, 1947). |
| Specimens examined | Taiwan, Taitung County, rice grains (cultivar Taitung 16), Nov 2016, Jie-Hao Ou, 16040 Taiwan, Taichung City, rice grains, Dec 2012, Jie-Hao Ou, 12056 Taiwan, Tainan City, rice grains (cultivar Tainan 11), Dec 2012, Jie-Hao Ou, 13016 Taiwan, Taitung County, rice grains (cultivar Taitung 30), Jan 2014, Jie-Hao Ou, 14007 Taiwan, Tainan City, rice grains (cultivar Tainan 11), Mar 2014, Jie-Hao Ou, 14041 Taiwan, Taitung County, rice grains (cultivar Taitung 30), Sep 2014, Jie-Hao Ou, 14116 Taiwan, Taitung County, rice grains (cultivar Kaohsiung 139), Nov 2014, Jie-Hao Ou, 14159 |
| ITS | GTAAAAGTCGTAACAAGGTCTCCGTTGGTGAACCAGCGGAGGGATCATTACAGAGTTGAAAAACTCCAACCCCTGTGAACCTACCTTTACTGTTGCTTCGGCGGAAGATGGCCCCCCCGGGCCGGGCGCCGCCGGAGGTCACAAACCCTGAATTTTTAGTGTATCTCTGAGTACAAAACCAAATAATTAAAACTTTCAACAACGGATCTCTTGGTTCTGGCATCGATGAAGAACGCAGCGAAATGCGATAAGTAATGTGAATTGCAGAATTCAGTGAATCATCGAATCTTTGAACGCACATTGCGCCCGCCGGTATTCCGGCGGGCATGCCTGTCCGAGCGTCATTTCACCACTCAAGCCCAGCTTGGTGTTGGGGCACCCGGCCGCCTGGCGGTCGGGGCCCCCAAGAACATCGGCGGTCTCGCTAGGACCCTGAACGCAGTAACTCGCGGTAAAACGCGCTTCGTTCGGAGGCTTCCCGGCGGGCTCCAGCCGCTAAACCCCCTAAACTTCTTAGGTTGACCTCGGATCAGGTAGGAATACCCGCTGAACTTAAG |