Plectosphaerella pauciseptata A.J.L. Phillips, A. Carlucci & M.L. Raimondo

Yang, Xiao Qian, Ma, Shi Yun, Peng, Ze Xiang, Wang, Zhong Qiao, Qiao, Min & Yu, Zefen, 2021, Diversity of Plectosphaerella within aquatic plants from southwest China, with P. endophytica and P. sichuanensis spp. nov., MycoKeys 80, pp. 57-75 : 57

Plectosphaerella pauciseptata A.J.L. Phillips, A. Carlucci & M.L. Raimondo Figure 6

Description.

Colony on CMA after 3 d, hyphae hyaline, septate, commonly branched, thin-walled, smooth, 2.5-3.0 μm (x̄ = 2.6 μm, n = 10) wide. Conidiophores macronematous, mononematous, erect, straight or flexuous, hyaline, smooth, aseptate, occasionally branched. Conidiogenous cells phialides, terminal, determinate, subulate, hyaline, smooth, thin-walled. Conidia acrogenous, hyaline, oblong-ellipsoidal, unicellular, smooth-walled, multi-guttulate, 5.5-12.5 × 2.5-3.5 μm (x̄ = 9.7 × 3.3 µm, n = 30), forming hyaline to white mucilaginous masses. Sexual morph and chlamydospores absent.

Culture characteristics.

Colonies on OA reaching 55 mm diameter, on PDA reaching 49 mm diameter and on CMA reaching 45 mm diameter in 14 d at 25 °C. On PDA, colonies white, dense, raised, aerial hyphae growth in the medium surface, margin regular, frontier distinct, reverse pale brown to white.

Strain examined.

China, Yunnan Province, Erhai, 25°43'N, 100°11'E, 1964 m alt., isolated from Myriophyllum spicatum as an endophyte, 31 Jul. 2014, Z.F. Yu, YMF 1.05088, YMF 1.04679, YMF 1.04725.

Figures

Figure 6. Plectosphaerella pauciseptata (YMF 1.05088) A-C colony on OA, PDA and CMA after 14 d D-F conidiophores and Phialides G conidia. Scale bars: 1.35 cm (A-C), 10 µm (D-G).