Setophoma zoysiae H. Liu & H. Sang, 2025

Liu, Haifeng, Choi, Hyeongju, Paul, Narayan Chandra, Ariyawansa, Hiran A. & Sang, Hyunkyu, 2025, Discovering fungal communities in roots of Zoysia japonica and characterising novel species and their antifungal activities, IMA Fungus 16, pp. e 138479-e 138479 : e138479-

Setophoma zoysiae H. Liu & H. Sang sp. nov.

Fig. 14

Etymology.

Name refers to its host genus Zoysia.

Description from living culture CMML 20-14 .

Sexual morph: undetermined. Asexual morph: Sporulation observed on OA media (Fig. 14 b – f ). Conidiomata produced on surface of colonies (Fig. 14 b, c ). Conidia ellipsoidal to subcylindrical, aseptate, 3.0–4.6 × 1.8–2.5 μm (Fig. 14 d – f ).

Type.

Korea • South Jeolla Province, Hwasun , isolated from roots of Zoysia japonica , October 2020, H. Liu and H. Sang, holotype CMML 20-14 H (permanently preserved in a metabolically inactive state), ex-holotype CMML 20-14 , ex-isotype CMML 20-15 .

Culture characteristics.

Colony reaching 28.12 mm diam. in darkness after 7 days at 25 ° C on PDA, front side white to light pink, reverse side yellow to sandy brown, mycelia dense (Fig. 14 a ).

Notes.

Phylogenetic analysis was conducted using dataset from combined sequences of ITS, LSU, TEF 1, RPB 2 and TUB 2. The strains CMML 20-14 and CMML 20-15 formed a distinct single branch in the genus Setophoma , supported with a high statistical support (100 % / 1.00) (Fig. 15 ), sister to clade containing ex-type strain ( CBS 335.29 ) and representative strains ( CBS 335.87 , CBS 377.52 and CPC 18417 ) of S. terrestris . However, conidia of these two strains are smaller than those of S. terrestris (previously Phoma terrestris , 4.5–5.5 × 1.8–2.3 μm; Hassen (1929)). Hence, Setophoma zoysiae sp. nov. was introduced in this study to accommodate CMML 20-14 and CMML 20- 15 in the genus Setophoma .

Figures

Figure 14. Setophoma zoysiae sp. nov. (CMML 20-14) a front and reverse sides of colony on PDA b, c conidiomata on OA media d – f conidia. Scale bars: 30 μm (d, e); 4.5 μm (f).

Figure 15. Maximum Likelihood phylogenetic tree based on combined sequences of ITS, LSU, TEF 1, RPB 2 and TUB 2 from Setophoma species. Bootstrap values (BS) and Bayesian posterior probabilities (PP) are given at the nodes (BS / PP). Strains obtained from this study are in bold blue. Ex-type isolates are marked with T. Setoseptoria phragmitis (CBS 114802 and CBS 114966) was used as the outgroup taxon.