Lasiodiplodia euphorbicola
Lasiodiplodia euphorbicola A.R. Machado & O.L. Pereira, in Machado, Pinho & Pereira, Fungal Diversity 67(1): 238 (2014)
MycoBanK: MB804872
Etymology: in reference to host family (Euphorbiaceae) of this pathogen.
Mycelium immersed or superficial, branched, septate, dark brown. Conidiomata pycnidial, stromatic, superficial, sepa- rate, globose, dark brown, unilocular, 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, deter- minate, discrete, cylindrical, hyaline, smooth and thin-walled, formed from cells lining the inner pycnidial walls, 5 − 15 × 3 − 4 μm. Paraphyses hyaline, cylindrical, septate, occasionally branched, ends rounded, up to 76 μm long, 2 − 4 μm wide. Conidia acrogenous, aseptate, ellipsoid to ovoid hyaline when young, later becoming medianly one-septate, dark brown, thick-walled, frequently with rounded apices, sometimes trun- cate base, 15−23×9−12 μm and longitudinal striations.
Habitat: On Jatropha curcas
Known distribution: Espírito Santo, São Paulo and Minas Gerais States, Brazil
Material utilized for morphological description: BRAZIL, Colatina, Espírito Santo, collar and root rot of J. curcas, 2011, A. R. Machado & O. L. Pereira, (VIC39109 holotype; culture ex-type CMM3609).
Figure.1: a–f Lasiodiplodia euphorbicola strain CMM3609. a–b, conidiomata on Pinus twigs in culture. c, conidia developing on conidiogenous cells and septate paraphyses. d, paraphyses branched. e, immature conidia. f, mature conidia. Scale bars: a =500 μm; b =250 μm; c– d=5 μm; e– f=15 μm.