Yunnanensis phragmitis Karun., Phook. & K.D. Hyde, Mycosphere

Tan, Xiao-Ming, Li, Cui, Hu, Dian-Ming, Tennakoon, Danushka S. & Song, Hai-Yan, 2024, A new host record of Yunnanensis phragmitis on white ginger lily (Hedychium coronarium J. Koenig.) from China, Phytotaxa 678 (2), pp. 125-134 : 129-130

Yunnanensis phragmitis Karun., Phook. & K.D. Hyde, Mycosphere 8(10): 1823 (2017)

Saprobic on dead stem of Hedychium coronarium J. Koenig. Sexual morph: See Karunarathna et al. (2017). Asexual morph: Coelomycetous. Conidiomata 65–80 × 80–100 µm diam. (x = 70 × 85 µm, n = 10), solitary or clustered, immersed to erumpent, dark brown to black, globose to subglobose, slightly depressed, unilocular, lacking ostiole. Conidiomatal wall 8–15 μm wide, composed of 4–5 layers of thin-walled, brown to dark brown pseudoparenchymatous cells of textura angularis, inner layer with hyaline cells of textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells 4–8 ×5–8 µm (x = 6 × 7 µm, n = 10), enteroblastic, phialidic, integrated to discrete, doliiform, lageniform or cylindrical, smooth, hyaline, thin-walled, arising from the basal cavity. Conidia 9–14 × 6–8 µm (x = 12 × 7 µm, n = 40), ellipsoidal to obovoid, truncate at the base, obtuse at the apex, muriform, hyaline when immature, brown to dark brown at maturity, 3 transverse septa, with 1 or 2 longitudinal septa, constricted at the septa, smooth-walled with minute guttules.

Material examined:— China, Yunnan Province, Kunming, dead stem of Hedychium coronarium ( Zingiberaceae ), 21 September 2016, D. S. Tennakoon, KIB25 (HKAS96339).

Known hosts:— Phragmites australis , Hedychium coronarium ( Karunarathna et al. 2017, this study)

Known distribution:— China ( Karunarathna et al. 2017, this study)

Notes:— Yunnanensis phragmitis was introduced by Karunarathna et al. (2017), collected from Phragmites australis in China. The morphological characteristics of our collection (HKAS96339) tally well with the Y. phragmitis by solitary or clustered, immersed to erumpent, dark brown to black conidiomata, enteroblastic, phialidic, integrated to discrete, doliiform, lageniform or cylindrical conidiogenous cells and ellipsoidal to obovoid, brown to dark brown, muriform conidia ( Karunarathna et al. 2017). In addition, there are overlapped size ranges of conidiomata (65–80 × 80–100 µm vs 71–72 × 81–83 µm), conidiomatal wall (8–15 μm vs 6–11 μm), conidiogenous cells (4–8 × 5–8 µm vs 4–7 × 4–8 µm) and conidia (9–14 × 6–8 µm vs 10–13 × 6–8 µm). According to the multi-gene phylogeny ( LSU, SSU, ITS and tef1- α), our collection clusters well with Y. phragmitis isolates (MFLUCC 17-0315 and MFLUCC 17- 1361) in a strongly supported clade (100% ML and 1.00 BYPP). Therefore, based on solid morphology and phylogeny evidence, we confirm our collection as Y. phragmitis and introduce as a new host record from Hedychium coronarium ( Zingiberaceae ) in China.