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Septoglomus fuscum and S. furcatum, two new species of arbuscular mycorrhizal fungi (Glomeromycota)

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  • Janusz Blaszkowski, Department of Plant Protection, West Pomeranian University of Technology, Polen
  • Gerad Chwat, Department of Plant Protection, West Pomeranian University of Technology, Polen
  • Gábor M Kovacs, Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Ungarn
  • Bence K Gáspár, Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Ungarn
  • T. Balázs
  • ,
  • Przemyslaw Ryszka, Institute of Environmental Sciences, Jagiellonian University, Polen
  • Elzbieta Zofia Orlowska, Danmark
  • Marcela C Pagano, Department of Biology, Federal University of Ceará, Brasilien
  • Francisca S Araújo, Department of Biology, Federal University of Ceará, Brasilien
  • Tesfaye Wubet, UFZ- Helmholtz Centre for Environmental Research, Tyskland
  • Francois Buscot, UFZ- Helmholtz Centre for Environmental Research, Tyskland
Two new arbuscular mycorrhizal fungal species, (Glomeromycota) Septoglomus fuscum and S. furcatum, are described and illustrated. Spores of S. fuscum usually occur in loose hypogeous clusters, rarely singly in soil or inside roots, and S. furcatum forms only single spores in soil. Spores of S. fuscum are brownish orange to dark brown, globose to subglobose, (20–)47(–90) μm diam, rarely ovoid, 21–50 × 23–60 μm. Their spore wall consists of a semi-persistent, semi-flexible, orange white to golden yellow, rarely hyaline, outer layer, easily separating from a laminate, smooth, brownish orange to dark brown inner layer. Spores of S. furcatum are reddish brown to dark brown, globose to subglobose, (106–) 138(–167) μm diam, rarely ovoid, 108–127 × 135–160 μm, usually with one subtending hypha that is frequently branched below the spore base, or occasionally with two subtending hyphae located close together. Spore walls consists of a semipermanent, hyaline to light orange outermost layer, a semipermanent, hyaline to golden yellow middle layer, and a laminate, smooth, reddish brown to dark brown innermost layer. None of the spore-wall layers of S. fuscum and S. furcatum stain in Melzer’s reagent. In the field, S. fuscum was associated with roots of Arctotheca populifolia colonizing maritime dunes located near Strand in South Africa and S. furcatum was associated with Cordia oncocalyx growing in a dry forest in the Ceará State, Brazil. In single-species cultures with Plantago lanceolata as host plant, S. fuscum and S. furcatum formed arbuscular mycorrhizae. Phylogenetic analyses of the SSU, ITS and LSU nrDNA sequences placed the two new species in genus Septoglomus and both new taxa were separated from described Septoglomus species.
OriginalsprogEngelsk
TidsskriftMycologia
Vol/bind105
Sider (fra-til)670-680
Antal sider11
ISSN0027-5514
DOI
StatusUdgivet - maj 2013

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