Lasiodiplodia subglobosa
Lasiodiplodia subglobosa A.R. Machado & O.L. Pereira, in Machado, Pinho & Pereira, Fungal Diversity 67(1): 241 (2014)
MycoBanK: MB804870
Etymology: in reference to frequent form of conidia.
Mycelium immersed or superficial, branched, septate, dark brown. Conidiomata pycnidial, stromatic, immersed or super- ficial, separate or aggregated, globose, dark brown, uni- or multilocular, often covered by aerial mycelium, formed superficially on twigs of pinus or corn straw in culture. Wall dark brown, thick-walled textura angularis, paler and thinner towards the conidiogenous region. Conidiophores absent. Conidiogenous cells holoblastic, determinate, discrete, cylin- drical, hyaline, smooth and thin-walled, formed from cells lining the inner pycnidial walls, 8 − 18 × 3 − 4.5 μm. Paraphyses hyaline, cylindrical, aseptate, not branched, ends rounded, up to 41 μm long, 2 − 3 μm wide. Conidia acrogenous, ovoid to subglobose, hyaline when young, later becoming medianly one-septate, dark brown, thick- walled, frequently with rounded apices, sometimes truncate base, 16−23× 11−17 μm and longitudinal striations.
Habitat: On Jatropha curcas
Known distribution: Minas Gerais state
Material examined: BRAZIL, Jaíba, Minas Gerais, Collar and root rot of J. curcas, 2011, A. R. Machado & O. L. Pereira (VIC39112 holotype; culture ex-type CMM3872).
Figure 1: a–f Lasiodiplodia subglobosa strain CMM3872. a–b, conidiomata on Pinus twigs in culture. c, conidia developing on conidiogenous cells. d, paraphyses. e, immature conidia. f, mature conidia in two different focal planes show the longitudinal striations. Scale bars: a =1000 μm; b =50 μm; c– d=10 μm; e– f=15 μm.