Minutisphaerales » Acrogenosporaceae » Acrogenospora

Acrogenospora subprolata

Acrogenospora subprolata Goh, K.D. Hyde & C.K.M. Tsui, Mycol. Res. 102(11): 1314 (1998)

 

Saprobic on submerged decaying wood. Sexual morph: Undetermined. Asexual morph: Colonies effuse on natural substrate, hairy, dark brown. Mycelium partly immersed, partly superficial, composed of septate, brown to dark brown, branched, smooth hyphae. Conidiophores 212.5–348 × 8–10.5 μm (x̄ = 280.5 × 9.4 μm, n = 15) wide, mononematous, macronematous, solitary, or in a small group, erect, straight or slightly flexuous, cylindrical, unbranched, brown to dark brown, paler toward apex, septate, smooth. Conidiogenous cells holoblastic, monoblastic, integrated, initially terminal, later becoming intercalary, cylindrical, smooth, pale brown, proliferating percurrently. Conidia 40–51 × 32–40 μm (x̄ = 45 × 31.5μm, n = 30) wide, acrogenous, solitary, subprolate to broadly ellipsoidal, base truncate, aseptate, hyaline when young, olivaceous brown to black when mature, thick-walled, smooth. (Descriptions from Bao et al. 2020)

 

Material examined: CHINA, Tibet Province, saprobic on decaying wood submerged in a stream, 2 May 2017, Z.L. Luo. S-1455 (MFLU 20–0293), living culture, MFLUCC 18–1314.

 

Notes: Acrogenospora subprolata is characterized by conidiophores that are macronematous, mononematous, solitary or in groups of 2–4 with multiple percurrent proliferations and by acrogenous, subprolate to broadly ellipsoidal, pale orange-brown to olivaceous brown, aseptate, thick-walled conidia. The isolate in the study of Bao et al. (2020) fits well with the characters of A. subprolata as described by Goh et al. (1998). (Notes taken from Bao et al. 2020)

 

References

Bao DF, McKenzie EHC, Bhat DJ, et al (2020) Acrogenospora (Acrogenosporaceae, Minutisphaerales) appears to be a very diverse genus. Front Microbiol 1606. https://doi.org/10.3389/fmicb.2020.01606

Goh TK, Hyde KD, Tsui KM (1998) The hyphomycete genus Acrogenospora, with two new species and two new combinations. Mycol Res 102:1309–1315. https://doi.org/10.1017/S0953756298006790

 

Fig 1. Acrogenospora subprolata (MFLU 20–0293). a,b. Colonies on wood. c–e. Conidiophores and conidia. f–h. Conidiogenous cells with conidia. i–l. conidia. Scale bars: a,b = 200 μm, c–e = 100 μm, f,g = 30 μm, h–l = 20 μm.

 

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