Daldinia eschscholtzii ( Ehrenb.: Fr. ) Rehm

Wu, Yingying, Li, Shuji, Jiang, Ning & Tian, Chengming, 2025, Morphological and molecular identification of new species and records of Daldinia (Hypoxylaceae, Xylariales) from Guizhou Province, China, MycoKeys 123, pp. 253-269 : 253-269

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

Fig. 2

Description.

Sexual morph: not observed. Asexual morph: Conidiophores with Virgariella - like to Nodulisporium - like branching, mononematous or dichotomous, bearing 1–4 conidiogenous cells per terminus, smooth to finely roughened, hyaline, aseptate, 23.5–28.5 × 2.5–3 (av. ± S. D. = 26 ± 1.9 × 3 ± 0.2 µm, n = 30) μm. Conidiogenous cells terminal or lateral, cylindrical to phialidic, smooth-finely roughened, hyaline, aseptate, apical, 9–14.5 × 2–3 μm (av. ± S. D. = 11.5 ± 1.5 × 2.5 ± 0.3 µm, n = 30). Conidia ellipsoid, cylindrical, oval in shape, smooth, hyaline to pale yellow, aseptate, solitary, holoblastic-sympodial, 4.5–6.5 × 2–4 μm (av. ± S. D. = 5.5 ± 0.5 × 3.0 ± 0.4 µm, n = 50).

Culture characters.

Colonies were dense and uniform, with entire margins and velvety texture, fluffy, surface grayish-white, slightly darker centrally, reverse pale yellow to buff, dark brown at the center. Colonies developed abundant aerial hyphae and reached 60 mm in diameter after 7 days on PDA at 25 ° C.

Materials examined.

China • Guizhou Province, Xingyi City, Maling River Canyon Scenic Area , 25°7'49"N, 104°57'19"E, on the leaf spots of Indocalamus hirsutissimus , 26 Jul 2024, C. M. Tian, N. Jiang, S. J. Li and Y. Y. Wu, BJFC -S 2541 , living culture CFCC 72597 ; ibid. BJFC -S 2542 , living culture CFCC 72598 .

Notes.

Based on multi-locus phylogenetic analysis, two strains ( CFCC 72597 and CFCC 72598 ) formed a highly supported clade with Daldinia eschscholtzii (100 % MP / 100 % ML / 0.99 BYPP). D. eschscholtzii is a multifunctional wood-inhabiting fungus exhibiting endophytic, saprophytic, and pathogenic traits ( Stadler et al. 2014). Daldinia eschscholtzii exhibits endophytic, saprophytic, and pathogenic traits ( Stadler et al. 2014) and has a broad host range spanning 56 plant families across 31 countries (Suppl. material 2), mainly colonizing decaying dicotyledonous wood and occasionally occurring on marine algae ( Karnchanatat et al. 2007; Zhang et al. 2008; Tarman et al. 2012). Its human pathogenic potential is also confirmed ( Ng et al. 2012, 2016; Yew et al. 2014; Chan et al. 2015). This study represents the first documented record of D. eschscholtzii on Indocalamus , supported by phylogenetic congruence with known D. eschscholtzii and alignment with its generalist ecology of colonizing lignocellulosic substrates, like Indocalamus .

Figures

Figure 2. Daldinia eschscholtzii (BJFC - S 2541) A, D. Leaf of host Rubus idaeus; B. Front colony morphology on PDA at 14 days; C. Reverse colony morphology on PDA at 14 days; E – I. Conidiogenous cells and conidia; J, K. Conidia. Scale Bars: 500 μm (D); 10 μm (E – K).