New insights into the mycorrhizal <i>Rhizoscyphus ericae</i> aggregate: spatial structure and co‐colonization of ectomycorrhizal and ericoid roots

Grelet, Gwen‐Aëlle; Johnson, David; Vrålstad, Trude; Alexander, Ian J.; Anderson, Ian C.

doi:10.1111/j.1469-8137.2010.03353.x

Cited by 79 publications

(59 citation statements)

References 45 publications

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“…However, except for our study, Rhizodermea and Rhizoscyphus have not been reported to symbiotically interact with plants growing under heavy-metal stress. For example, Rhizoscyphus ericae is an ericoid mycorrhizal fungus that infects leafy liverworts or ectomycorrhizal and ericoid mycorrhizal tree roots [57,58]. Rhizodermea veluwensis is a recently described species that was isolated from surface-sterilized roots of Erica tetralix , Empetrum nigrum , and Vaccinium spp., plants of the family Ericaceae, and also Larix decidua [59].…”

Section: Discussionmentioning

confidence: 99%

Root Fungal Endophytes Enhance Heavy-Metal Stress Tolerance of Clethra barbinervis Growing Naturally at Mining Sites via Growth Enhancement, Promotion of Nutrient Uptake and Decrease of Heavy-Metal Concentration

et al. 2016

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Clethra barbinervis Sieb. et Zucc. is a tree species that grows naturally at several mine sites and seems to be tolerant of high concentrations of heavy metals, such as Cu, Zn, and Pb. The purpose of this study is to clarify the mechanism(s) underlying this species’ ability to tolerate the sites’ severe heavy-metal pollution by considering C. barbinervis interaction with root fungal endophytes. We measured the heavy metal concentrations of root-zone soil, leaves, branches, and fine roots collected from mature C. barbinervis at Hitachi mine. We isolated fungal endophytes from surface-sterilized root segments, and we examined the growth, and heavy metal and nutrient absorption of C. barbinervis seedlings growing in sterilized mine soil with or without root fungal endophytes. Field analyses showed that C. barbinervis contained considerably high amounts of Cu, Zn, and Pb in fine roots and Zn in leaves. The fungi, Phialocephala fortinii, Rhizodermea veluwensis, and Rhizoscyphus sp. were frequently isolated as dominant fungal endophyte species. Inoculation of these root fungal endophytes to C. barbinervis seedlings growing in sterilized mine soil indicated that these fungi significantly enhanced the growth of C. barbinervis seedlings, increased K uptake in shoots and reduced the concentrations of Cu, Ni, Zn, Cd, and Pb in roots. Without root fungal endophytes, C. barbinervis could hardly grow under the heavy-metal contaminated condition, showing chlorosis, a symptom of heavy-metal toxicity. Our results indicate that the tree C. barbinervis can tolerate high heavy-metal concentrations due to the support of root fungal endophytes including P. fortinii, R. veluwensis, and Rhizoscyphus sp. via growth enhancement, K uptake promotion and decrease of heavy metal concentrations.

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Section: Discussionmentioning

confidence: 99%

Root Fungal Endophytes Enhance Heavy-Metal Stress Tolerance of Clethra barbinervis Growing Naturally at Mining Sites via Growth Enhancement, Promotion of Nutrient Uptake and Decrease of Heavy-Metal Concentration

et al. 2016

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“…Our analysis of OTU richness supported suggested previously high diversity within several fungal taxa, for example, Rhizoscyphus ericae , that is considered a ‘species aggregate’ (Hambleton & Sigler ; Grelet et al . ) and for which 19 species hypotheses have been proposed by UNITE experts, or Pseudogymnoascus sp. that is known to be far exceeding the number of described species (Minnis & Lindner ).…”

Section: Discussionmentioning

confidence: 99%

Long‐term experimental warming alters community composition of ascomycetes in Alaskan moist and dry arctic tundra

et al. 2015

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Arctic tundra regions have been responding to global warming with visible changes in plant community composition, including expansion of shrubs and declines in lichens and bryophytes. Even though it is well known that the majority of arctic plants are associated with their symbiotic fungi, how fungal community composition will be different with climate warming remains largely unknown. In this study, we addressed the effects of long-term (18 years) experimental warming on the community composition and taxonomic richness of soil ascomycetes in dry and moist tundra types. Using deep Ion Torrent sequencing, we quantified how OTU assemblage and richness of different orders of Ascomycota changed in response to summer warming. Experimental warming significantly altered ascomycete communities with stronger responses observed in the moist tundra compared with dry tundra. The proportion of several lichenized and mossassociated fungi decreased with warming, while the proportion of several plant and insect pathogens and saprotrophic species was higher in the warming treatment. The observed alterations in both taxonomic and ecological groups of ascomycetes are discussed in relation to previously reported warming-induced shifts in arctic plant communities, including decline in lichens and bryophytes and increase in coverage and biomass of shrubs.

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“…It is one of only three ECM-forming Helotialian species currently known to make up the /meliniomyces lineage, the others being Meliniomyces bicolor and Rhizoscyphus ericae (Tedersoo et al 2010a). These three species are very closely related, and can also form ericoid mycorrhizae (Grelet et al 2010). It is possible that C. finlandica was associated with Rhododendron spp.…”

Section: Ecm Fungal Communities Differed Less Than Expected Among Micmentioning

confidence: 99%

Ectomycorrhizal fungal hyphae communities vary more along a pH and nitrogen gradient than between decayed wood and mineral soil microsites

Walker

Phillips

Jones

2014

Botany

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Ectomycorrhizal (ECM) fungal community composition is structured by soil properties, but specialization for woody microsites by ECM fungi is equivocal. Because fungal mycelia explore the substrate and colonize nutrient patches, studies targeting ECM fungal hyphae may reveal niche preferences. Moreover, studying the distribution and composition of ECM fungal hyphal communities contributes to our understanding of nutrient cycling in forest soils. We used next-generation sequencing to determine whether the composition of forest floor fungal communities present as hyphae differed among three microsite types: decayed wood, mineral soil adjacent to intact logs, or control mineral soil of mature spruce forests in British Columbia. The microsites were located in three blocks that were separated by 1 km and varied in elevation. Across the site, the ECM fungal lineage /amphinema-tylospora was the most operational taxonomic unit (OTU)-rich group, while the saprotrophic order Mortierellales was also dominant. ECM fungal species differed among microsites. For example, ECM fungal OTUs identified as Tylospora fibrillosa and Russula curtipes were more frequent in decayed wood as compared with control mineral soil. However, ECM fungal communities were more strongly structured by block characteristics, and we conclude there is no distinct group of ECM fungi specializing in the soil microsites examined in this forest.Résumé : La composition d'une communauté fongique ectomycorhizienne (ECM) est structurée par les propriétés du sol, mais la spécialisation des ECM envers des microsites ligneux est équivoque. Parce que les mycéliums fongiques explorent le substrat et colonisent les parcelles comportant des nutriments, des études ciblant les hyphes fongiques ECM peuvent révéler leurs préférences sur le plan des niches. De plus, l'étude de la distribution et de la composition des communautés hyphales fongiques d'ECM contribue à notre compréhension du cycle des nutriments dans les sols forestiers. Nous avons utilisé le séquençage de dernière génération afin de déterminer si la composition des communautés fongiques du sol forestier présentes sous forme d'hyphe différait en fonction de trois types de microsites : le bois en décomposition, le sol minéral adjacent aux billes intactes ou le sol minéral contrôle de forêts matures d'épinettes en Colombie-Britannique. Les microsites étaient localisés dans trois blocs séparés d'un km et variaient sur le plan de l'élévation. À travers le site, le lignage fongique /amphinema-tylospora d'ECM était le groupe le plus riche en unités taxonomiques opérationnelles (UTO), alors que l'ordre saprotrophe des Mortierellales était aussi dominant. Les espèces d'ECM fongiques différaient en fonction du microsite. Par exemple les UTO fongiques d'ECM identifiées comme Tylospora fibrillosa et Russula curtipes étaient les plus fréquentes sur le bois en décomposition comparativement au sol minéral contrôle. Toutefois, les communautés fongiques d'ECM étaient plus fortement structurées par les caractéristiques du bloc, ...

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New insights into the mycorrhizal Rhizoscyphus ericae aggregate: spatial structure and co‐colonization of ectomycorrhizal and ericoid roots

Cited by 79 publications

References 45 publications

Root Fungal Endophytes Enhance Heavy-Metal Stress Tolerance of Clethra barbinervis Growing Naturally at Mining Sites via Growth Enhancement, Promotion of Nutrient Uptake and Decrease of Heavy-Metal Concentration

Root Fungal Endophytes Enhance Heavy-Metal Stress Tolerance of Clethra barbinervis Growing Naturally at Mining Sites via Growth Enhancement, Promotion of Nutrient Uptake and Decrease of Heavy-Metal Concentration

Long‐term experimental warming alters community composition of ascomycetes in Alaskan moist and dry arctic tundra

Ectomycorrhizal fungal hyphae communities vary more along a pH and nitrogen gradient than between decayed wood and mineral soil microsites

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