Xylariales » Hypoxylaceae » Daldinia

Daldinia eschscholtzii

Daldinia eschscholtzii (Ehrenb.) Rehm, Annls mycol. 2(2): 175 (1904)

Index Fungorum Number: IF544992   Facesoffungi Number: FoF02990

 

Sexual morph: See Stadler et al. (2014). Asexual morph: White to grayish black effused colonies on PDA. Mycelium 2.4–5.2 µm (x̄ = 3.4 µm, n = 10) wide, coenocytic to septate, internal to superficial, vacuolic hypha, light brown to olivaceous, delicately verruculose mostly at the end of the conidiophores, tubular and slightly thickened cell walls with nodulisporium-like branching patterns. Conidiophores 36–186 × 2.4–4.7 µm (x̄ = 101 × 4 µm, n = 7), mononematous, erect to flexuous, arising terminally or laterally from hypha, cylindrical-oblong, branched, aseptate, hyaline to olivaceous, verruculose, warted, primary branches 36–129 × 3–7 µm (x̄ = 88.8 × 4.5 µm, n = 10), secondary branches 16.8–161 × 1.7–4.5 µm (x̄ = 61.3 × 3.2 µm, n = 10) bearing 1–3 phialides. Conidiogenous cells 11.4–19 × 1.9–5.2 µm (x̄ = 14.6 × 3.6 µm, n = 5), polyblastic, terminal or intercalary, cylindrical to occasionally ampulliform, pale brown to hyaline, smooth-walled to verruculose. Conidia 1.3–5.5 × 0.7–2.8 µm (x̄ = 2.7 × 1.7 µm, n = 30), ovoid, aseptate, hilum basally displayed, guttulate, hyaline to olivaceous, thick, smooth-walled.

 

Culture characteristics: Colonies growing on PDA reaching a diameter of 90 mm after 9 days at 25 °C, surface slightly rough, edge entire to undulate, medium dense. Colony from above: light gray to olivaceous at the margin, light green to white at the center; reverse: white to gray at the margin, blackish brown at the center; mycelium hyaline to light brown. Colonies sporulated after 4 days.

 

Material examined: THAILAND, Chiang Mai Province, Mae Taeng, Pha Deng Village, Mushroom Research Center, on symptomless fresh leaves of Phegopteris sp. (Thelypteridaceae), 18 December 2022, AG. Gunarathne, TAU 0007

 

Fig. 1 Daldinia eschscholtzii a Phegopteris host. b, c Sporulated colony on PDA after 4 days. d–j Conidiophores with nodulisporium-like branching patterns, and intercalary conidiogenous cells bearing conidia (f–h, j in 5 % KOH, i in Lactophenol cotton blue). k. Conidia. Scale bars: d = 200 µm, e = 100 µm, f = 50 µm, g–j = 20 µm, k = 5 µm.

 

Fig. 2 Bayesian analyses inferred from a combined dataset of LSU, ITS, rpb2 and tub2 sequence data of 78 genera of Hypoxylaceae species and three species as the outgroup. Maximum Likelihood bootstrap (≥80 %) and Bayesian posterior probabilities (≥ 0.80 PP) are displayed at the branches. The strain generated in this study is in red and type strains are in bold. The tree is rooted with Xylaria. polymorpha (MUCL 49884), X. hypoxylon (CBS 122620) and Graphostroma platystomum (CBS 270.87). The scale bar indicates 0.06 nucleotide changes per site.

 

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