| Authors | (Berk. & Broome) Petch 1924 |
|---|---|
| Strain | 13033 |
| Classification | Xylariales, Apiosporaceae, Nigrospora |
| Culture collection | BCRC FU30221 |
| Detection frequency | Medium |
| Accession number | LC494381 |
| Figure |  Fig. 1 5-day-old colony on PDA  Fig. 2 Nigrospora oryzae. a–d. Conidiophores and conidia (Bars= 5 μm, unless otherwise specified) |
| Colonies | Colonies on PDA attaining 0-, >90-, 85-mm at 37 °C, 28 °C and 24 °C after 5 days, margins entire, sparse cottony, reverse white to yellowish, dark olivaceous near center. |
| Conidiophores | Conidiophores solitary or in group, short, simple or branched, hyaline or pale brown, often consisting of 1 to several swollen, globose or irregular cells. |
| Conidiogenous cells | Conidiogenous cells hyaline, subglobose, cylindrical or irregular, bearing 1–2 conidia, often becoming collapsed after conidia detached |
| Conidia | Conidia globose to subglobose, aseptate, brown to dark brown, 10–13(–16) µm (avg. 11.97 µm) in diameter. |
| Note | This species is commonly associated with diverse plants hosts as pathogens, endophytes, or saprobes. Nigrospora oryzae can be distinguished from Nigrospora sphaerica, another Nigrospora species occurring on rice, by the size of the conidia (10–13(–16) vs. (13–)15–19(–21) µm) and the color of the conidiogenous cells, being hyaline in the former and brown in the latter. |
| Pathogenicity | This species is often found on rice seeds as saprophyte. Occasionally cause secondary infections only when plants are injured, which has little effect on rice production. Reported to cause minute leaf and grain spot (Mew & Gonzales, 2002; Ou, 1985). |
| Specimens examined | Taiwan, Taichung City, rice grains (cultivar Tainung 67), Aug 2013, Jie-Hao Ou, 13033 Taiwan, Taichung City, rice grains (cultivar Tainan 11), Sep 2013, Jie-Hao Ou, 13036 Taiwan, Pingtung County, rice grains (cultivar Taiken 9), Aug 2014, Jie-Hao Ou, 14092 Taiwan, Taitung County, rice grains (cultivar Taitung 30), Sep 2014, Jie-Hao Ou, 14114 Taiwan, Miaoli County, rice grains (cultivar Miaoli 2), Dec 2014, Jie-Hao Ou, 14190 |
| ITS | CAGAGTTATCCAACTCCCAAACCCATGTGAACTTATCTCTTTGTTGCCTCGGCGCAAGCTACCCGGGACCTCGCGCCCCGGGGGGCCCGCCGGCGGACAAACCAAACTCTGTTATCTTCGTTGATTATCTGAGTGTCTTATTTAATAAGTCAAAACTTTCAACAACGGATCTCTTGGTTCTGGCATCGATGAAGAACGCAGCGAAATGCGATAAGTAATGTGAATTGCAGAATTCAGTGAATCATCGAATCTTTGAACGCACATTGCGCCCATTAGTATTCTAGTGGGCATGCCTGTTCGAGCGTCATTTCAACCCCTAAGCGCAGCTTATTGCTGGGACTCTACGGCTTCGTAGTTCCCCAAAGACATTGGCGGAGTGGCAGCAGTCCTCTGAGCGTAGTAATTCTTTATCTCGCTTTTGTTAGGCGCTGCCCCCCCGGCCGTAAAACCCCCAATTTTTTCTGGTTGACCTCGGATCAGGTAGGAATACCCGCTGAACTTAA |