Alternaria yamethinensis M. N. Zin & J. X. Deng, 2024

Nwe, Zin Mar, Htut, Khin Nayyi, Aung, Sein Lai Lai, Gou, Ya-Nan, Huang, Cheng-Xin & Deng, Jian-Xin, 2024, Two novel species and a new host record of Alternaria (Pleosporales, Pleosporaceae) from sunflower (Compositae) in Myanmar, MycoKeys 105, pp. 337-354 : 337-354

publication ID

https://doi.org/ 10.3897/mycokeys.105.123790

DOI

https://doi.org/10.5281/zenodo.11520897

persistent identifier

https://treatment.plazi.org/id/A8A4C075-E1BF-5118-86ED-302CDDEB35F9

treatment provided by

MycoKeys by Pensoft

scientific name

Alternaria yamethinensis M. N. Zin & J. X. Deng
status

sp. nov.

Alternaria yamethinensis M. N. Zin & J. X. Deng sp. nov.

Fig. 3 View Figure 3

Etymology.

The epithet designation is attributed to the Yamethin township, which was the location where the holotype was originally collected.

Holotype.

Myanmar, Mandalay Region, Yamethin Township, Segyi Village (30 ° 21 ' 28.188 " N, 112 ° 08 ' 32.136 " E) on infected leaves of Helianthus annuus , August 2023, Khin Nayyi Htut, ( YZU – H – 2023154 , holotype), ex-type culture ( YZU 231739 About YZU ). GoogleMaps

Description.

Colonies on PDA are light yellow in the center, white at the edge, with flocculent hyphae, and sulfur yellow to pure yellow in reverse, 38–50 mm in diameter (Fig. 3 a View Figure 3 ). On PCA, conidiophores arise from the substrate, are simple, straight or flexuous, septate, light to brown, 19–85 (– 95) × 3–6.5 μm. Conidia arise from the apex or near the apex of the conidiophores, rarely from lateral hyphae, and are narrow ovoid or subellipsoid, blunt-pointed, 17–50 (– 65) × 8–14 µm, with 2–7 transverse septa and 2–6 units per chain with a beak 5–15 µm (Fig. 3 c, e, g View Figure 3 ). On V 8 A, conidiophores are 17–65 (– 85.5) × 2–5.5 μm, and conidia are 32–57 (– 63) × 8–15 µm with 2–7 transverse septa, 2–9 units per chain and a beak 1.5–8 µm (Fig. 3 b, d, f View Figure 3 ).

Additional isolate examined.

Myanmar, Mandalay Region, Yamethin Township, Segyi Village (30 ° 21 ' 28.188 " N, 112 ° 08 ' 32.136 " E) on infected leaves of Helianthus annuus , August 2023, Khin Nayyi Htut, living culture ( YZU 231738 ) GoogleMaps .

Notes.

Phylogenetic analysis based on combined gene regions of ITS, GAPDH, RPB 2, TEF 1, Alt a 1, EndoPG, and OPA 10-2, along with morphological characteristics, clearly separates this species from others. It can be differentiated from A. betae-kenyensis (20–28 × 8–10 µm) by conidial size, A. eichhorniae (50–150 × 4–5 µm) and A. iridiaustralis (15–100 (– 133) × 3.5–4.5 µm) by conidial beak, and A. salicicola (12–38 µm) by conidial body width. Moreover, it is significantly distinct from those four species by conidial units per chain (Table 3 View Table 3 ).

YZU

Yuzhou University

PDA

Royal Botanic Gardens

V

Royal British Columbia Museum - Herbarium

A

Harvard University - Arnold Arboretum

TEF

Centre National de la Recherche Appliquée au Developement Rural