The arbuscular mycorrhizal Paraglomus majewskii sp. nov. represents a distinct basal lineage in Glomeromycota

Janusz Błaszkowski, Gábor M. Kovács, Bence K. Gáspár, Tímea K. Balázs, François Buscot, Przemysław Ryszka

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Paraglomus majewskii sp. nov. (Glomeromycota) is described and illustrated. It forms single spores, which are hyaline through their life cycle, globose to subglobose, (35-)63(-78) μm diam, sometimes egg-shaped, 50-70 × 65-90 μm, and have an unusually narrow, (3.2-)4.6(-5.9) μm, cylindrical to slightly flared subtending hypha. The spore wall of P. majewskii consists of an evanescent, short-lived outermost layer, a laminate middle layer, and a flexible innermost layer, which adheres tightly to the middle layer. None of the spore wall layers stain in Melzer's reagent. In single-species cultures with Plantago lanceolata as the host plant P. majewskii formed arbuscular mycorrhizae staining violet in trypan blue. P. majewskii has been isolated from several, distant geographic regions and from different habitats. In phylogenetic analyses of partial nrDNA SSU and LSU sequences the fungus formed monophyletic group with Paraglomus species; however it represents a well separated distinct lineage. Its nrDNA sequences are highly similar to in planta arbuscular mycorrhizal fungal sequences from different habitats in Spain and Ecuador.

Original languageEnglish
Pages (from-to)148-156
Number of pages9
JournalMycologia
Volume104
Issue number1
DOIs
Publication statusPublished - Jan 1 2012

Keywords

  • AMF specific PCR primers
  • Ancestral lineage
  • Arbuscular mycorrhizal fungi
  • Glomeromycota
  • Mycorrhizae
  • Paraglomeraceae

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Physiology
  • Molecular Biology
  • Genetics
  • Cell Biology

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