Ericoid mycorrhizal fungi are common root inhabitants of non-Ericaceae plants in a south-eastern Australian sclerophyll forest

Chambers, Susan M.; Curlevski, Nathalie J. A.; Cairney, John

doi:10.1111/j.1574-6941.2008.00481.x

Cited by 56 publications

(49 citation statements)

References 41 publications

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“…kaempferi (Planch.) E.H. Wilsonhair roots while Chambers et al (2008) noted that some fungal isolates formed ErM coils in the ericaceous roots and DSE association in the roots of non-ericaceous plants. In this study, a single mycelium simultaneously developed structures corresponding to ErM and DSE association in a single ericaceous root.…”

Section: Discussionmentioning

confidence: 96%

The Co-occurrence and Morphological Continuum Between Ericoid Mycorrhiza and Dark Septate Endophytes in Roots of Six European Rhododendron Species

Vohník

Albrechtová

2011

Folia Geobot

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Ericaceae associate with a wide spectrum of root mycobionts, but the most common are ascomycetous ericoid mycorrhizal fungi and dark septate endophytes (DSE), followed by basidiomycetous fungi and glomeracean arbuscular mycorrhizal fungi. We investigated distribution and morphological diversity of ericoid mycorrhizae (ErM), DSE associations, ectomycorrhizae (EcM) and arbuscular mycorrhizae (AM) in hair roots of six European native Rhododendron species and found that i) while EcM and AM were absent, ErM and DSE associations were simultaneously present in all screened plants; ii) their levels were negatively correlated, suggesting Ericaceae preference for certain root-fungus association in certain habitats; iii) the highest ErM colonization occurred at sites in southern and central Europe, while the highest DSE colonization was found in a subarctic site in northern Finland and in a subalpine site in the Carpathians, suggesting a latitudinal/altitudinal shift in Ericaceae root-fungus associations; iv) some mycelia could simultaneously form structures corresponding to ErM and DSE association, which occasionally resulted in a unique ectendomycorrhizal colonization comprising an intercellular parenchymatous net and intracellular hyphal coils. These results indicate frequent interactions between ErM fungi and DSE in roots of European rhododendrons and a morphological continuum between ErM and DSE associations. The new ectendomycorrhizal type deserves further investigation.

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Section: Discussionmentioning

confidence: 96%

The Co-occurrence and Morphological Continuum Between Ericoid Mycorrhiza and Dark Septate Endophytes in Roots of Six European Rhododendron Species

Vohník

Albrechtová

2011

Folia Geobot

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“…We also observed a large number of ericoid-like fungi on our root samples, as well as dominance of the communities in terms of frequency and abundance by Meliniomyces, a genus that forms ericoid mycorrhizae. This may not be surprising, as an increasing number of studies have found ericoid mycorrhizal fungi colonizing the roots of tree species in the family Pinaceae and other nonericoid plant species (13,33). Whether tree roots act as alternative or primary hosts for these fungi in the absence of ericaceous plants is uncertain.…”

Section: Downloaded Frommentioning

confidence: 99%

Vegetation and Soil Environment Influence the Spatial Distribution of Root-Associated Fungi in a Mature Beech-Maple Forest

Burke

López-Gutiérrez

Smemo

et al. 2009

Appl Environ Microbiol

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Although the level of diversity of root-associated fungi can be quite high, the effect of plant distribution and soil environment on root-associated fungal communities at fine spatial scales has received little attention. Here, we examine how soil environment and plant distribution affect the occurrence, diversity, and community structure of root-associated fungi at local patch scales within a mature forest. We used terminal restriction fragment length polymorphism and sequence analysis to detect 63 fungal species representing 28 different genera colonizing tree root tips. At least 32 species matched previously identified mycorrhizal fungi, with the remaining fungi including both saprotrophic and parasitic species. Root fungal communities were significantly different between June and September, suggesting a rapid temporal change in root fungal communities. Plant distribution affected root fungal communities, with some root fungi positively correlated with tree diameter and herbaceous-plant coverage. Some aspects of the soil environment were correlated with root fungal community structure, with the abundance of some root fungi positively correlated with soil pH and moisture content in June and with soil phosphorous (P) in September. Fungal distribution and community structure may be governed by plant-soil interactions at fine spatial scales within a mature forest. Soil P may play a role in structuring root fungal communities at certain times of the year.In temperate forests, most trees form relationships with ectomycorrhizal (ECM) fungi, and the diversity of this fungal group alone can approach 100 species within a forest stand (17,20,60). The ECM mutualism may be necessary for the success of some native plant species, as approximately 90% of roots of some tree species are colonized by ECM fungi (65). Nevertheless, we still know surprisingly little about what controls the community structure and distribution of root-associated fungi in forest systems (44,46). The occurrence of root-associated fungi may broadly reflect soil environmental conditions and the presence of preferred plant hosts (28, 61), but how these factors interact to influence the diversity, distribution, and community structure of these fungi within forest habitat patches at a local scale is uncertain.The distribution of root-associated fungi may be primarily a species response to local soil environmental conditions. For example, both the quality (i.e., nutrient content) and the quantity of soil organic matter are known to influence the diversity of ECM communities (18,20,32). ECM fungi also vary in drought tolerance (14, 36), resistance to fire (61, 65), and tolerance to soil acidity (19) and temperature (56). Changes in soil chemistry, especially as they relate to pH and the availability of nitrogen (N) and phosphorous (P), might favor selection of fungi most capable of tolerating environmental extremes (2,28,29).Plant distribution and identity may, however, play the strongest role in structuring the below-ground diversity of rootassociated fung...

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“…were once considered specific to plant species in the Ericaceae taxon, recent findings suggest that these fungi associate with other plant taxa. However, their role in plant establishment is not well understood Chambers et al, 2008). The only ECM fungal species unique to the chestnuts was a fungus from Cantharellales (Fig 2.).…”

Section: Resultsmentioning

confidence: 99%

Native Mycorrhizal Fungi Replace Introduced Fungal Species on Virginia Pine and American Chestnut Planted on Reclaimed Mine Sites of Ohio

Hiremath¹,

Lehtoma²,

Bauman³

2014

JASMR

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Abstract. Plant-microbe community dynamics influence the natural succession of plant species where pioneer vegetation facilitates the establishment of a distantly related, later successional plant species. This has been observed in the case of restoration of the American chestnut (Castanea dentata) on abandoned mine land where Virginia pine (Pinus virginiana) facilitated the establishment of chestnut seedlings. This was apparently due to the natural mycorrhizal networks of pine, which aided the survival and growth of chestnut seedlings. In this study, we assessed the survival and propensity of introduced mycorrhizal fungi on Virginia pine to colonize pure American and backcrossed American chestnut. Seedlings were planted in Perry State Forest located in southeastern Ohio. This area was mined for coal in the 1950s and had very little reclamation done aside from experimental tree plantings. The selected site, with little topsoil or organic matter, was characterized by high concentrations of Al, high soil temperatures, and a pH of 3.6. Virginia pine seedlings were inoculated using ectomycorrhizal (ECM) cultures of Amanita rubescens, Laccaria laccata, and Pisolithus tinctorius via liquid media. After three months, roots were tested for the presence of mycorrhizae. They were then transplanted and grown for two years in the greenhouse. After verifying mycorrhizal colonization, 600 pines were out planted in May of 2005. Chestnut seedlings (100 one-year-old seedlings) inoculated with P. tinctorius by the Ohio state tree nursery had been planted by other researchers at the same time. After eight growing seasons, pines and chestnuts were measured and sampled for ECM colonization. Growth measurements showed that pines and hybrid chestnuts had significantly more aboveground biomass compared to pure American chestnut (P = 0.01). Eleven fungal species were detected using DNA sequencing. With the exception of Amanita, the inoculum that were out planted with both chestnut and Virginia pine were replaced after 8 field seasons by fungi native to the site. More fungal species were sampled from the Virginia pines than from chestnut roots, which contributed to the significant differences in ECM fungal community composition between the two species (P = 0.005).

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Ericoid mycorrhizal fungi are common root inhabitants of non-Ericaceae plants in a south-eastern Australian sclerophyll forest

Cited by 56 publications

References 41 publications

The Co-occurrence and Morphological Continuum Between Ericoid Mycorrhiza and Dark Septate Endophytes in Roots of Six European Rhododendron Species

The Co-occurrence and Morphological Continuum Between Ericoid Mycorrhiza and Dark Septate Endophytes in Roots of Six European Rhododendron Species

Vegetation and Soil Environment Influence the Spatial Distribution of Root-Associated Fungi in a Mature Beech-Maple Forest

Native Mycorrhizal Fungi Replace Introduced Fungal Species on Virginia Pine and American Chestnut Planted on Reclaimed Mine Sites of Ohio

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