Xylariales » Diatrypaceae » Allodiatrype

Allodiatrype elaeidicola

Allodiatrype elaeidicola

Konta, Boonmee & K.D. Hyde (2020)

 

Classification:Ascomycota-Pezizomycotina-Sordariomycetes-Xylariomycetidae-Xylariales-Diatrypaceae-Allodiatrype

 

Host species: Elaeis guineensis (Konta et al. 2020)

 

Holotype: MFLU 15-1468 (Konta et al. 2020)

 

Known distribution: Phang-Nga, Thailand

 

IF Number: IF556930       Mycobank Number: 556930     FOF Number: FoF05118

 

Description

Saprobic on petiole of Elaeis guineensis (Arecaceae). Sexual morph: Stromata 1.2–2.8 mm long, 0.96–1.66 mm diam. (x̄ = 1.86 × 1.19 mm, n = 15), with well-developed interior, solitary to gregarious, erumpent, black, with black stromatic zone extending down to the host surface, glabrous, irregular in shape, pustulate, multi-ascomata, with umbilicate ostioles appearing on the surface of the stroma. Ostiole opening through host bark and appearing as black spots, surrounded with a ring-like structure, composed of an outer layer of dark brown, small, tightly packed, thin parenchymatous cells and an inner layer of yellowish to orange, large, loosely packed, parenchymatous cells. Ascomata (excluding necks) 280–430 μm high, 180–435 μm diam. (x̄ = 370 × 270 μm, n = 30), perithecial, immersed in the stroma, globose to subglobose, glabrous, ostioles individual, with a short neck. Ostiolar canal 120–185 μm high, 60–120 μm diam. (x̄ = 140 × 95 μm, n = 30), cylindrical, sulcate, with periphyses. Peridium 14–40 μm wide (x̄ = 29 μm, n = 30), composed of two section layers, outer part; brown to dark brown, thick-walled cells, arranged in textura angularis, inner layer; hyaline, thick-walled cells of textura angularis. Hamathecium undermined. Asci (excluding stalks), spore-bearing part (17–)20–31(−43) × 4–7 μm (x̄ = 26 × 6 μm, n = 50), apically rounded, with J-apical ring, apex-bearing part (1.6–)2–3(−5) μm long (x̄ = 3, n = 20), 8-spored, unitunicate, clavate, with long stalks, stalk-bearing part (32–)40–60(–76) μm long (x̄ = 50 μm, n = 20). Ascospores (6.5–)8–10(−11) × 1.5–3 μm (x̄ = 9 × 2 μm, n = 100), overlapping, yellowish to brown, ellipsoidal to cylindrical or elongate-allantoid, aseptate, smooth-walled. Asexual morph: Undetermined.

 

Culture conditions: Ascospores germinated on MEA within 24 hours and germ tube was produced from end cell. Colonies on MEA, white when beginning, dense but thinner towards edge, margin diffuse, reverse coloration yellow.

 

 

Allodiatrype elaeidicola (MFLU 15-1468, holotype) (A) Stromata on host substrate. (B) Close up of stromata (ostiole opening surrounded with a ring-like structure). (C, D) Section of stroma. (E, I) Mature asci. (F–H) Immature asci stained in cotton blue. (J) Ostiolar canal. (K) Peridium. (L–Q) Ascospores. (R) Colony on MEA. Bars: A, B = 1000 μm, C = 500 μm, D = 200 μm, E–K = 50 μm, L–Q = 5 μm.

 

Reference

Konta, S., Maharachchikumbura, S. S. N., Senanayake, I. C., McKenzie, E. H. C., Jeewon, R., Stadler, M., ... & Eungwanichayapant, P. D. (2020). A new genus Allodiatrype, five new species and a new host record of diatrypaceous fungi from palms (Arecaceae). Mycosphere, 11(1), 239-268.

 

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