Trichoderma angustum W.T. Qin & W.Y. Zhuang, 2017
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publication ID |
https://doi.org/ 10.11646/phytotaxa.305.3.1 |
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DOI |
https://doi.org/10.5281/zenodo.13694929 |
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persistent identifier |
https://treatment.plazi.org/id/03DC878B-3A09-BC59-FF31-FB53FF63F521 |
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treatment provided by |
Felipe |
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scientific name |
Trichoderma angustum W.T. Qin & W.Y. Zhuang |
| status |
sp. nov. |
Trichoderma angustum W.T. Qin & W.Y. Zhuang View in CoL , sp. nov. FIGURE 2 View FIGURE 2
Etymology: —The specific epithet refers to the narrow phialides.
MycoBank: MB 816629
Type: — CHINA. HUBEI: Shennongjia, Jinhouling, 2500 m, on herbaceous stems, 14 Sep 2014, Z.Q. Zeng, H.D. Zheng, W. T. Qin & K. Chen 9572 (holotype HMAS 273784).
On CMD after 72 h 52–57 mm, and mycelium covering the plate after 5 d at 25 C. Colony thin, typically not zonate, aerial hyphae numerous and radially arranged in the plate. Conidiophores trichoderma- to verticillium-like, formed widely spaced on aerial hyphae. Phialides solitary or commonly divergent in whorls of 2–4(–5), lageniform to subulate, straight, 7–24(–26) × (2–)2.5–3.5(–4) μm, l/w (1.8–)2.7–8.9(–10.5), (1.2–)1.5–2.5(–2.8) wide at the base (n = 40). Conidia green, globose, oval to ellipsoidal, smooth, (2.8–)3–5.5(–6.5) × 2.3–4.2 μm, l/ w 1.0 –1.8(–1.9) (n = 50). Chlamydospores densely disposed, terminal or intercalary, globose, ellipsoidal or rectangular, 6–9(–11) × (5.5–)6– 8.6(–9.3) μm, l/ w 1.0 –1.2 (n = 40). No distinct odor; no diffusing pigment observed.
On PDA after 72 h 50–55 mm and mycelium covering the plate after 5 d at 25 C. Colony dense, with coarse surface, not zonate; aerial hyphae abundant, radially arranged in the plate. Conidiation noted starting along the distal margin of the plate, first pale green, gradually turning green. No distinct odor; no diffusing pigment or reverse slightly yellow.
On SNA after 72 h 47–50 mm and mycelium covering the plate after 5 d at 25 C. Colony nearly transparent, thin, aerial hyphae indistinct or not common, margin slightly wavy at early stage. Granules or pustules noted starting at the distal margin of the plate, first pale green, then gradually turning green. No distinct odor; no diffusing pigment observed.
Notes: — Trichoderma strictipile , sister to T. angustum , is similar in growth rate on the three different media, but differs in having pachybasium-like conidiophores and not trichoderma- to verticillium-like, and shorter and wider phialides [(4.0–)7.2–7.7(–21.7) × (2.0–)4.0–4.2(–5.7) μm] ( Chaverri & Samuels 2003, Jaklitsch 2009). In addition, sequence similarities of RPB 2 and TEF 1-α between the two fungi were 97.5% and 96.8%, i.e. 30 bp divergences among 1204 bp for RPB 2 and 37 bp divergences among 1166 bp for TEF 1-α were detected.
Fungi in the Strictipile clade are found on decaying wood and bark or in soil, while T. angustum grows on herbaceous stems, a common substrate for species in the Spinulosum clade ( Chaverri & Samuels 2003, Jaklitsch 2009).
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