Botryosphaeriales » Botryosphaeriaceae » Lasiodiplodia

Lasiodiplodia thailandica

Lasiodiplodia thailandica Trakun., L. Lombard & Crous, in Trakunyingcharoen, Lombard, Groenewald, Toanun & Crous, Persoonia 34: 95. 2014.

Index Fungorum: IF810169 MycoBank: MB810169.

Colony sporulating on PNA. Asexual morph: Conidiomata pycnidial up to 310 – 330 × 300 – 370 μm, solitary or aggregated, semi-immersed, partially erumpent when mature, dark brown to black, outer layers 60–150 × 5–6 μm, composed of dark brown textura angularis, with rounded tips. Ostiole circular, central, 40–60 μm diam., neck 60 –110 μm tall. Paraphyses 25–51 × 1–1.5 μm, 1–3-septate, hyaline, smooth. Conidiophores reduced to conidiogenous cells. Conidiogenous cells 8–9 × 2–4 μm, discrete, cylindrical, hyaline, smooth. Conidia (20–)22–25(–26) × (12–)13–15(–16) μm, wall 1.2–1.5 μm thick, subglobose to oval, initially hyaline, initially hyaline, becoming 1-septate and longitudinal striations when mature. Sexual morph: not observed.

Culture characteristics: Colonies are fast growing on PDA, white at first, sparse, aerial, becoming black-olivaceous on the surface after 7 d.

Representative isolate: Thailand, Chiang Mai province, on twigs of Mangifera indica, May 2012, T. Trakunyingcharoen, holotype CBS-H 21933, CPC 22795 = CBS 138760 (ex-type culture).

Hosts: Mangifera indica (Trakunyingcharoen et al. 2012).

Known distribution: Chiang Mai province, Thailand.

GenBank Numbers: ITS KJ193637; TEF KJ193681

Notes: Lasiodiplodia thailandica is phylogenetically closely related to L. iraniensis and L. jatrophicola. Morphologically, these species differ based on the dimensions of their conidia and paraphyses. In addition, only some conidia of L. thailandica become pigmented after conidial discharge, which again separates it from most other Lasiodiplodia species.