• Corpus ID: 82925289

A proposal to classify ectomycorrhizal mycelial systems according to their patterns of differentiation and putative ecological importance

  title={A proposal to classify ectomycorrhizal mycelial systems according to their patterns of differentiation and putative ecological importance},
  author={Reinhard Agerer},
There is a need to quantify and qualify the ability of ectomycorrhizae to improve tree growth and nutrition and, in particular, to define criteria to classify ectomycorrhizae with respect to ecologically relevant features. Whereas the numbers of ectomycorrhizae and morphotypes give useful information when related to root biomass, root length or soil volume, the develop- ment and differentiation of the extramatrical mycelium may represent important predicative features relevant to the ecological… 
Differential ability of ectomycorrhizas to survive drying
A simple method was developed to quantify the loss of vitality of excised ectomycorrhizal tips subjected to drying under controlled conditions, which confirmed the ability of the latter fungal species to protect roots against desiccation already suggested by previous works.
Plants and Their Ectomycorrhizosphere: Cost and Benefit of Symbiotic Soil Organisms
This work quantifies the exploration type specific space occupation under the influence of twice-ambient ozone concentrations and estimates the carbon cost the tree has to pay for and addresses enzymatic capacities of ectomycorrhizal communities and focus on bacteria being associated with the mycelium.
Characterization and spatial distribution of ectomycorrhizas colonizing aspen clones released in an experimental field
Two invasion strategies of ectomycorrhizal fungi (EMF) from aspen clones released on an experimental field were recognized, the success of which depends on adaptation of the EMF to local ecological conditions.
Quantification of extraradical soil mycelium and ectomycorrhizas of Boletus edulis in a Scots pine forest with variable sporocarp productivity
The productivity of the plots, in terms of sporocarps produced during the last 10 years, was not correlated either with the concentration of soil mycelium or with the presence or abundance of ectomycorrhizas.
Activity profiling of ectomycorrhiza communities in two forest soils using multiple enzymatic tests.
A microplate multiple enzymatic test was developed which makes it possible to measure eight enzyme activities on 14 individual, excised ECM root tips, and proved to be accurate and sensitive enough to reveal a high diversity of activity profiles, depending on the fungal symbiont and the soil horizon.
Distance-related semi-quantitative estimation of the extramatrical ectomycorrhizal mycelia of Cortinarius obtusus and Tylospora asterophora
It is concluded that these two species differ considerably in the amount and extension of their mycelia and this may be in line with their assignment to the respective exploration types and further studies are needed to substantiate these results.
Secreted enzymatic activities of ectomycorrhizal fungi as a case study of functional diversity and functional redundancy
This study provides the first evidence of functional redundancy in ectomycorrhizal communities, in two different forest stands, and shows that in both forest stands: TD is strongly correlated with FD.
Uniting Tricholoma sulphureum and T. bufonium.
T. bufonium cannot be maintained as an autonomous taxon and should be treated as an infraspecific variant of T. sulphureum, which is not correlated with morphology, ecology, or geographical distribution.
The ectomycorrhizal symbiosis: Life in the real world
It is shown that it would take between 3 and 14 million mycorrhizal tips, or 1800 km of hyphae, to supply the N in one sporocarp of Boletus edulis, and the mantle formed by the fungus over the root tip is the likely site of storage for the N and P required for sporocaru production.
Systematics and Ecology of Edible Ectomycorrhizal Mushrooms
It is clear that the vast majority of species and lineages of edible EM fungi are solely harvested from natural habitats, so policies that conserve the natural habitats where these fungi grow and reproduce are critical to future yields.


Synthesized ectomycorrhizae of aspen: fungal genus level of structural characterization
The ability of Populus tremuloides Michx. to form ectomycorrhizae with identified species of fungi was investigated using a pouch technique. Twenty-nine out of 54 fungus species formed
It is increasingly evident that in natural plant communities the vegetative mycelia of ectomycorrhizal fungi can form networks of hyphal interconnections which link the root systems of their host
Anatomical Characteristics of Identified Ectomycorrhizas: An Attempt Towards a Natural Classification
Methods for characterization of ectomycorrhizas have been compiled and important features have been discussed in a recent publication (Agerer 1991a). As the characteristics have already been
Some distinctive types of Eucalypt Mycorrhiza
Two features which do not appear to have been used elsewhere are shown to be valuable in making distinctions: the anatomy of fungal rhizomorphs, and the tissue structure of the mantle as revealed in plan view by cleared whole mounts.
Identification of ectomycorrhizas
This book describes a rapid but accurate method for examination and characterization, using a series of 24 descriptions of ectomycorrhizas most commonly encountered on young trees in Britain by the ITE research group, designed to relate to the way in which whole root mounts are examined.
Physiological heterogeneity within fungal mycelia: an important concept for a functional understanding of the ectomycorrhizal symbiosis.
It is suggested that it is only by considering the sum of the seemingly disparate physiological processes within the heterogeneous mycelium that mycorrhizal functioning can be fully understood.
2 Characterization of Ectomycorrhiza
Studies on Ectomycorrhizae. XX. Mycorrhizae Formed by Thelephora Terrestris on Norway Spruce
The ectomycorrhizae are well-characterized by a plectenchymatous mantle with netted hyphae below the mantle surface, by cystidia with abruptly thick walls with a distal clamp and often frequent simple septa.
The growth of the extramatrical mycelium of ectomycorrhizal fungi and the growth response of Pinus sylvestris L.
The existence of an important negative correlation between the extent of the fungal development and the growth of the host plants is demonstrated and it is suggested that also nitrogen acquisition by the plants might be altered by the fungus.
Ectomycorrhizae of Hydnellum Peckii on Norway Spruce and their Chlamydospores
Ectomycorrhizae of Hydnellum peckii on Picea abies are described, characterized by a plectenchymatous mantle with hyphae embedded in a gelatinous matrix with adhering mineral soil particles.