Amphisphaeriales » Apiosporaceae » Nigrospora

Nigrospora oryzae

Nigrospora oryzae (Berk. & Broome) Petch , J. Indian bot. Soc. 4 : 24 (1924)

Facesoffungi number: FoF06596

Sexual morph: Undetermined. Asexual morph: Asexual morph: Hyphomycetes. Conidiophores 24– 32 × 2–3 µm x̄ = 28 × 2.5 µm, n = 10) macronematous, mononematous, flexuous, smooth, hyaline to pale brown, branched. Conidiogenous cells 3.2–5.6 × 2–3 µm x̄ = 4.9 × 2.6 µm, n = 20) holoblastic, monoblastic, solitary, hyaline to subhyaline, ampulliform to subsphaerical , discrete, smooth. Conidia 4–5.5 × 4.2–5 µm x̄ = 5.2 × 4.8 µm, n = 100) dry, solitary, acro genous, simple, spherical to broadly ellipsoidal, aseptate, black, smooth, velvety.

Culture characteristics: Conidia germinating on PDA within 12 hours and germ tubes produced from all cells. Colonies growing on PDA, hairy, black, reaching 5 mm in 7 days at 30 ºC, mycelium partly superficial, partly immersed, slightly effuse, radially striate, with irregular edge, black; Asexual spores were formed after 30 days and sexual spores not formed within 60 days.

Known distribution: Australia (Barkat et al. 2016), China (Sun et al. 2011, Chen et al. 2018, Zhang et al. 2019b), Iran (Hashemian Kalati et al. 2014), Italy (Lorenzini et al. 2016), Kazakstan (Eken et al. 2016), Pakistan (Alam et al. 2017b), Sri Lanka (Wang et al. 2017), Thailand.

Material examined: Thailand, Chiang Rai Province, Doi Mae Salong, on fallen dead leaves of Phyllostachys heterocycla Poaceae 18 May 2016, J. F Li, DMS12 2 (MFLU 17–0199, new host and geographical record), living culture at KUMCC 16 16–0041.

GenBank Accession No: ITS: MN648321, LSU: MN64832, SSU: MN64831.

 

Notes: Nigrospora oryzae has a cosmopolitan distribution and a wide host range (Wang et al. 2017, Raza et al. 2019). In this study, our collection (KUMCC 16 0041) collected from Doi Mae Salong , Thailand, clustered in a single clade with N. oryzae and their morphological characteristics were similar to those of N. oryzae. Therefore, we regard this isolate (KUMCC 16 0041) as N. oryzae as the first report.

Figure X. Nigrospora oryzae MFLU 17-0199, new host and geographical record) record). a. Colonies on bamboo leaves. b , c. Conidia and conidiophores. d j Conidiop hores with conidiogenous cells. k u Conidia. Scale bars: a = 200 µm , b = 50 µm , c = 2 0 µm, d f = 10 µm, g u = 5 µm.

 

 

Reference: Hyde KD, de Silva NI, Jeewon R, Bhat DJ, Liu NG, Chaiwan N, Bulgakov TS (2020) AJOM new records and collections of fungi: 1–100. Asian Journal of Mycology, 3, 22-294.

 

 

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