High diversity of arbuscular mycorrhizal fungi in a boreal herb‐rich coniferous forest

Abstract

* Here, the diversity of arbuscular mycorrhizal (AM) fungi was determined in a boreal herb-rich coniferous forest in relation to environmental variables. * Root samples of five plant species (Fragaria vesca, Galeobdolon luteum, Hepatica nobilis, Oxalis acetosella and Trifolium pratense) were analysed from stands differing in age and forest management intensity. * Thirty-four Glomeromycota taxa (small-subunit ribosomal RNA gene (SSU rDNA) sequence groups) were detected from 90 root samples (911 clones), including eight new taxa. Sequence groups related to Glomus intraradices were most common (MO-G3 and MO-G13). Samples of H. nobilis were colonized by more AM fungal taxa (3.68 +/- 0.31) than those of O. acetosella (2.69 +/- 0.34), but did not differ significantly in this respect from those of F. vesca (3.15 +/- 0.38). Effects of forest management, host plant species (except above) or season on the number or composition of fungal taxa in root samples were not detected, and neither were they explained by environmental variables (vegetation, soil and light conditions). * This is the most taxon-rich habitat described to date in terms of root-colonizing Glomeromycota. The data demonstrate the importance of temperate coniferous forests as habitats for AM fungi and plants. Lack of obvious fungal community patterns suggests more complex effects of biotic and abiotic factors, and possibly no adverse effect of common forest management practices on AM fungal diversity.

Changes in Land Use System and Environmental Factors Affect Arbuscular Mycorrhizal Fungal Density and Diversity, and Enzyme Activities in Rhizospheric Soils of Acacia senegal (L.) Willd.

“…These results were comparable to the diversity of AMF described in Senegal [7,8] and in other countries [37]. In contrast, Opik et al [38] described 34 different AMF taxa in a single habitat (a boreal herbrich coniferous forest). Among the 10 AMF spores described here, the FNSP5 species closed to Scutellospora gregaria and the FNSP7 species closed to Glomus intraradices were previously described in Senegal by Duponnois et al [8] and Manga et al [9], respectively.…”

“…The effect of land uses (plantation versus natural population) on the diversity of AMF was noticed in the site of Dahra, but not in that of Goudiry. Opik and coworkers [38] found in a boreal herb-rich coniferous forest that management practices had no adverse impact on the AMF biodiversity. These results suggested that the relationship between management practice and AMF richness is complex and may be positive [45] or negative [46].…”

Differential effects of abiotic factors and host plant traits on diversity and community composition of root-colonizing arbuscular mycorrhizal fungi in a salt-stressed ecosystem

“…However, considerably higher numbers of AMF phylotypes per host plant species have been reported for other ecosystems, such as polluted sites (5.2), temperate forests (5.6), tropical forests (18.2), grasslands (8.3), high altitude sites of the Tibet Plateau (10.5), and extreme geothermal soils (16) (Öpik et al 2006;Liu et al 2011, Appoloni et al 2008. Although plants in coastal areas appear to harbour fewer AMF phylotypes than in other ecosystems, care should be taken when interpreting these data because the number of samples, the size of a root, sampling season, or molecular methodologies (rDNA markers, screened/sequenced of clone number, OUT/phylotype definition) can significantly affect the number of root-colonizing AMF detected (Kowalchuk et al 2002;Heinemeyer and Fitter 2004;Öpik et al 2008;Dumbrell et al 2010). …”

Diversidad de hongos micorrícicos arbusculares en maíz con cultivo de cobertura y biofertilizantes en Chiapas, México

“…Schübler (2006) clasificó los HMA en 10 géneros con aproximadamente 193 especies descritas. A pesar que la información sobre diversidad de HMA en ecosistemas naturales y manejados es escasa, existen evidencias de que ésta podría ser mayor que la reportada (Opik et al 2008). Borstler et al (2006) estimaron que en el mundo podría haber 1250 especies de HMA.…”