Ascomycota, Pezizomycotina, Pleosporales, Pleosporaceae. Genus: BIPOLARIS
Bipolaris cynodontis (Marignoni) Shoemaker
Latest update: 23 July 2024
Colony characteristics
Colonies (SGA, 10 d, 28°C) with limited expansion, woolly, initially whitish grey, becoming greyish black at maturity; reverse black.
Microscopy
Hyphae pale brown, Conidiophores erect, simple or branched, 100-300 µm high, 3.5-4.5 µm at the base, septate, brown, geniculate with flat, dark scars in the distal part resulting from sympodial conidium production. Conidia 20-50 × 7.5-9.5 µm, smooth, straight or slightly curved, broadly ellipsoidal, pale to olivaceous brown, with 3-5 distosepta and flat basal scar. Conidium germination bipolar. Heterothallic.
Pathogenicity
RG-1, BSL-1. Plant pathogen on Cynodon grass. Sharma & Nonzom (2021) described a superficial pedal infection. Nath et al. (2015) described a chromoblastomycosis-like case that was ascribed to B. cynodontis and Cladosporium cladosporioides; etiology is however uncertain.
Nomenclature
Helminthosporium cynodontis Marignoni – Micromiceti di Schio p. 27, 1909 ≡ Bipolaris cynodontis (Marignoni) Shoemaker – Can. J. Bot. 37: 883, 1959 ≡ Drechslera cynodontis (Marignoni) Subramanian & Jain – Curr. Sci. 35: 354, 1966; type strain: CBS 109894.
Cochliobolus cynodontis R.R. Nelson – Mycologia 56: 67, 1964.
