Lasiodiplodia theobromae (Pat.) Griffon & Maubl., Bull. Soc. mycol. Fr. 25: 57 (1909)
Index Fungorum number: IF188476; Facesofungi number: FoF 00167
Saprobic on dead branch of Rosa canina L. Sexual morph: Undetermined. Asexual morph: coelomycetous. Conidiomata 120–175 μm high × 80–125 μm diam. (x̄ = 145 × 110 μm, n = 10), pycnidial, stromatic, solitary or aggregated, globose to subglobose. Peridium composed of brown thick-walled textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells 7–16 × 3–5 μm (x̄ = 12 × 4.5 μm, n = 20) lining the pycnidial cavity, holoblastic, hyaline, subcylindrical, smooth-walled. Conidia 16–20 × 6–8 μm (x̄ = 18 × 7, n = 30) initially hyaline, becoming dark brown and 1-septate often while still attached to the conidiogenous cell, ovoid with a broadly rounded apex and truncate base, brown, 1-septate, slightly constricted at the septum.
Culture characteristics: Colonies on PDA, covering entire petri dishes after 7 days in the dark at 25 ºC; circular, initially white, after 7 d becoming greyish black; reverse grey to dark greyish green.
Material examined: ITALY, Province of Forlı`-Cesena [FC], near Strada San Zeno, Galeata, on dead aerial branch and spines of Rosa canina (Rosaceae), 15 November 2014, Erio Camporesi IT 2227 (MFLU 17–0298), living culture MFLUCC 17–0952.
GenBank numbers: ITS: MG828906, TEF: MG829268.
Note: A fungal isolate obtained from a spine of Rosa canina was identified as Lasiodiplodia theobromae, with support from both morphology and phylogeny. This isolate clustered with the type isolate of L. theobromae (CBS 164.96), in the combined ITS and TEF phylogeny.
Figure x. Lasiodiplodia theobromae (MFLU 17–0298). a Conidiomata on host. b Cross section of the conidioma. c Immature conidia with conidiogenous cells. d Mature, hyaline conidia. Scale bars: b = 60 μm, c–d = 20 μm.
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