Abstract

The class Archaeorhizomycetes (Taphrinomycotina, Ascomycota) was introduced to accommodate an ancient lineage of soil-inhabiting fungi found in association with plant roots. Based on environmental sequencing data Archaeorhizomycetes may comprise a significant proportion of the total fungal community in soils. Yet the only species described and cultivated in this class is Archaeorhizomyces finlayi. In this paper, we describe a second species from a pure culture, Archaeorhizomyces borealis NS99-600(T) (=CBS138755(ExT)) based on morphological, physiological, and multi-locus molecular characterization. Archaeorhizomyces borealis was isolated from a root tip of a Pinus sylvestris seedling grown in a forest nursery in Lithuania. Analysis of Archaeorhizomycete species from environmental samples shows that it has a Eurasian distribution and is the most commonly observed species. Archaeorhizomyces borealis shows slow growth in culture and forms yellowish creamy colonies, characteristics that distinguish A. borealis from its closest relative A. finlayi. Here we also propose a sequence-based taxonomic classification of Archaeorhizomycetes and predict that approximately 500 species in this class remain to be isolated and described. (C) 2014 The British Mycological Society. Published by Elsevier Ltd. All rights reserved.

Keywords

Plant roots; Rhizosphere; Soil clone group 1; Soil fungi; Symbiosis

Published in

Fungal Biology
2014, Volume: 118, number: 12, pages: 943-955
Publisher: ELSEVIER SCI LTD

SLU Authors

• Menkis, Audrius

  • Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences
    
UKÄ Subject classification

Biological Systematics
Microbiology


Publication identifier

DOI: https://doi.org/10.1016/j.funbio.2014.08.005

Permanent link to this page (URI)

https://res.slu.se/id/publ/64369