Pleosporales » Didymellaceae » Neoascochyta

Neoascochyta tardicrescens

Neoascochyta tardicrescens Valenz.-Lopez, Cano, Crous, Guarro & Stchigel, in Valenzuela-Lopez et al. Stud. Mycol. 90: 44 (2017)

Facesoffungi number: FoF 07465

 

Saprobic on dead leaves of Dactylis glomerata. Sexual morph: undetermined. Asexual morph: Conidiomata 75–140 µm diam., 70–120 µm high, pycnidial, scattered or gregarious, immersed, with dark brown to black spots on the host surface, globose to subglobose, unilocular, thick-walled, ostiolate. Ostiole circular, papillate, centrally located. Conidiomatal wall 10–20 µm wide, composed of thick-walled, brown to hyaline cells of textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells 3–7 × 3–6 µm, hyaline, enteroloblastic, phialidic, doliiform to ampulliform, determinate, smooth-walled, formed from the inner wall cells of the pycnidium. Conidia 9–17.5 × 3–5 µm (= 13 × 4; n=50), hyaline, fusiform, straight, obtuse at both ends, smooth-walled, guttulate.

 

Culture characters: Colonies on PDA, reaching 20–30 mm diam. after 7d at 25–30°C, white to darker in the middle zone, becoming grey to black with age, velutinous to felty, flattened, dense, subsuperficial, reverse black, with fimbriae margins; sporulating after 3 months.

 

Material examined: Italy, province of Forlì-Cesena, Civitelle di Romagna, Bonalda, on dead aerial leaves of Dactylis glomerata (Poaceae), 2 December 2012, Erio Camporesi, IT945 (MFLU 19-2885), living culture MFLUCC 13-0483 = ICMP 20793; (KUN, HKAS 101699).

 

Notes: Neoascochyta tardicrescens has also been isolated from human feet (Valenzuela-Lopez et al. 2018).

Neoascochyta tardicrescens (MFLU 19-2885) a Herbarium specimen. b, c Appearance of dark brown conidiomata on the host. d Vertical section of conidioma. e Vertical section of peridium. f–g, i–j Conidiogenous cells and developing conidia. h Ostiole. k Germinating conidium. l–n Conidia. o–r Culture on PDA. Scale bars b = 200 µm, c = 100 µm, d, h, k = 20 µm, e = 10 µm, f–g = 5 µm, i–j = 2 µm, l–n = 5 µm, o–r = 25 mm.

 

 

References:

 

Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.

 

 

 

 

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