| Authors | O'Donnell, T. Aoki, Kistler & Geiser 2004 |
|---|---|
| Strain | 14140 |
| Classification | Hypocreales, Nectriaceae, Fusarium |
| Culture collection | BCRC FU31214 |
| Detection frequency | Low |
| Accession number | LC499614 |
| Figure |  Fig. 1 5-day-old colony on PDA  Fig. 2 Fusarium asiaticum. a. Ascus. b. Ascospore. c. Macroconidia. d. Ascomal wall. e, f. Perithecia formed in culture (Bars= 5 μm, unless otherwise specified) |
| Colonies | Colonies on PDA attaining 72-mm at 25 °C after 5 days, sparsely cottony, pale red-violet at the center, paler toward the edge, azonate, margin entire to undulate, reverse similar. |
| Conidia | Macroconidia rarely observed, hyaline, falcate, mostly 3-septate, 20–28 × 3–4.5 µm. |
| Ascomata | Perithecia superficial or partially immersed, dark blue, globose, composed of textura angularis, ostiolate, up to 250 µm in diam. |
| Asci | Asci clavate, 8-spored, 58–75 × 9–15 µm. |
| Ascospores | Ascospores fusiform, slightly curved, 3-septate, slightly constricted at septa, hyaline, light brown when mature, 19–24 × 4–5 µm. |
| Note | This species is a member of Fusarium graminearum species complex, and was proposedby O’Donnell et al. (2004) based on multilocus phylogeny.
Attempts to induce the sporulation on PDA, OA, SNA, CLA, and WA did not success. By following the method of Bowden & Leslie (1999) for the production of perithecia, the strain was cultured in a 9 cm medium containing 10% carrot agar until the whole plate was occupied, followed by adding 1 ml of 2.5% Tween 60, and then the mycelium was "knocked down" (NOT removed or scraped) with a glass spreader. Thereafter the plates were incubated at 24 °C for 7 days under black light. Macroconidia could be found around the perithecia. However, the production is very sparse. |
| Pathogenicity | F. asiaticum was found to be the main casual agent of Fusarium head blight (FHB) on rice by Dong et al. (2020). |
| Specimens examined | Taiwan, Taitung County, rice grains (cultivar Kaohsiung 139), Oct 2014, Jie-Hao Ou, 14140 |
| ITS | TCCCAAACCCCTGTGAACATACCTTATGTTGCCTCGGCGGATCAGCCCGCGCCCCGTAAAAAGGGACGGCCCGCCGCAGGAACCCTAAACTCTGTTTTTAGTGGAACTTCTGAGTATAAAAAACAAATAAATCAAAACTTTCAACAACGGATCTCTTGGTTCTGGCATCGATGAAGAACGCAGCAAAATGCGATAAGTAATGTGAATTGCAGAATTCAGTGAATCATCGAATCTTTGAACGCACATTGCGCCCGCCAGTATTCTGGCGGGCATGCCTGTTCGAGCGTCATTTCAACCCTCAAGCCCAGCTTGGTGTTGGGAGCTGCAGTCCTGCTGCACTCCCCAAATACATTGGCGGTCACGTCGAGCTTCCATAGCGTAGTAATTTACACATCGTTACTGGTAATCGTCGCGGCCACGCCGTTAAACCCCAACTTCTGAATGTTGACCTCGGATCAGGTAGGAATACCCGCTGAACTTAA |
| EF1a | ACACTTGGCGGGGTAGTTTCAAATTTCCAATGTGCTGACATACTTTGATAGACCGGTCACTTGATCTACCAGTGCGGTGGTATCGACAAGCGAACCATCGAGAAGTTCGAGAAGGTTGGTCTCATTTTCCTCGATCGCGCGCCCTTTTCCTTTCGAAATATCATTCGAATCGCACTCACACGACGACTCGATACGCGCCTGTTACCCCGCTCGAGGTCAAAATTTTTGCGGCTTTGTCGTAATTTTTTTCCCTGGTGGGGCTCATACCCCGCCACTCGAGCGACAGGCGTTTGCCCTCTTCCCACAAACCATTCCCTGGGCGCTCATCATCACGTGTCAACCAGTCACTAACCACCTGTCAATAGGAAGCCGCCGAGCTCGGTAAGGGTTCCTTCAAGTACGCCTGGGTTCTTGACAAGCTCAAAGCCGAGCGTGAGCGTGGTATCACCATTGATATCGCCCTCTGGAAGTTCGAGACTCCTCGCTACTATGTCACCGTCATTGGTATGTTGTCACCACTGCTGTCATCACATTCTCATACTAACATGGCTATCAGACGCTCCCGGTCACCGTGATTTCATCAAGAACATGATCACTGGTACTTCCCAGGCCGATTGCGCCATTCTCATCATTGCCGCCGGTACTGGTGAGTTCGAGGCTGGTATCTCCAAGGATGGCCAGACCCGTGAGCACGCTCTCCTTGCCTACACCCTTGGTGTCAAGAACCTCATTGTTGCCATCAACAAGATGGACACCACCAAGTGGTCTGAGGCCCGTTACCAGGAGATCATCAAGGAGACCTCTT |