Corynascus sepedonium
| Authors |
(C.W. Emmons) Arx 1973 |
| Strain |
13015 |
| Classification |
Sordariales, Chaetomiaceae, Corynascus |
| Culture collection |
BCRC FU30218 |
| Detection frequency |
Low |
| Accession number |
LC494367 |
| Figure |
 Fig. 1 5-day-old colony on PDA  Fig. 2 Corynascus sepedonium. a, b. Ascospores with two germ pores at both ends. c. Ascocarp and asci. d. Immature guttulate ascospores. e, g. Condiophores and conidia. f. Mature, thick-walled conidia (Bars= 5 μm, unless otherwise specified) |
| Colonies |
Colonies grow rapidly on PDA at 37 °C, attaining 26-, 28-, 45-mm at 24 °C, 28 °C and 37 °C after 5 days, margins entire, floccose, azonated, reverse yellowish to orange, slightly wrinkled at 37°C. |
| Conidiophores |
Conidiophores absent or poorly differentiated. |
| Conidiogenous cells |
Conidiogenous cells hyaline, lageniform, bearing 1–2 protruding conidiogenous loci, 5–15 × 2.5–4 μm. |
| Conidia |
Conidia globose, young conidia smooth, subhyaline, echinulate, thick-walled, pale golden brown when mature, 8–11 µm in diameter. |
| Ascomata |
Cleistothecia form in culture after several weeks, composed of flattened, reticulate cells (textura epidermoidea), spherical, dark brown, up to 150µm. |
| Asci |
Asci globose to ovoid, 8-spore, 25-35 µm in diameter. |
| Ascospores |
Ascospores broadly fusiform, young ascospores hyaline, often 1-guttulate, mature ascospores dark olivaceous, with two germ pores at both ends, 15-18 x 8.5-10 µm. |
| Note |
This is a thermophilic species. Strain 13053 shares 100% identity in ITS region with the ex-type strain of Corynascus sepedonium (CBS 111.69, HQ871751). |
| Pathogenicity |
Unknown. This species has not been previously found on rice. This species is mesophilic and commonly found in soil (Brink et al., 2012). |
| Specimens examined |
Taiwan, Tainan City, rice grains (cultivar Tainan 11), Dec 2012, Jie-Hao Ou, 13015 |
| ITS |
TCGTAACAAGGTCTCCGTTGGTGAACCAGCGGAGGGATCATTACAGAGTTGCAAAACTCCCTAAACCATCGTGAACGTTACCCAAACCGTTGCTTCGGCGGGCGGCGCCCTCGCGCGCCCCTGGGCCCCACCGCGGGCGCCCGCCGGAGGTTACCCAAACTCTTGATACATTATGGCCACTCTGAGTCTTCTGTACTGAATAAGTCAAAACTTTCAACAACGGATCTCTTGGTTCTGGCATCGATGAAGAACGCAGCGAAATGCGATAAGTAATGTGAATTGCAGAATTCAGTGAATCATCGAATCTTTGAACGCACATTGCGCCCGCCAGTATCCTGGCGGGCATGCCTGTTCGAGCGTCATTTCAACCATCAAGCCCCCGGCTTGTGTTGGGGACCTGCGGCTGTCCGCAGGCCCTGAAAACCAGTGGCGGGCTCGCTAGTCACACCGAGCGTAGTAGCATACATCTCGCTCAGGGCGTGCTGCGGGTTCCGGCCGTTAAACGACCTTCATAACCCAAGGTTGACCTCGGATCAGGTAGGAAGACCCGCTGAACTTAA |