Ectomycorrhizas and water relations of trees: a review

  title={Ectomycorrhizas and water relations of trees: a review},
  author={Tarja Lehto and Janusz J. Zwiazek},
There is plenty of evidence for improved nutrient acquisition by ectomycorrhizas in trees; however, their role in water uptake is much less clear. In addition to experiments showing improved performance during drought by mycorrhizal plants, there are several studies showing reduced root hydraulic conductivity and reduced water uptake in mycorrhizal roots. The clearest direct mechanism for increased water uptake is the increased extension growth and absorbing surface area, particularly in fungal… 

The ectomycorrhizal contribution to tree nutrition

Attributing functions to ectomycorrhizal fungal identities in assemblages for nitrogen acquisition under stress

A model that predicts net N flux into the plant based on taxon-specific 15N enrichment in ectomycorrhizal root tips is developed and validated and opens a new avenue to characterize the functional traits of EMF taxa in complex communities.

Do ectomycorrhizas affect boron uptake in Betula pendula

The main result was that mycorrhizas did not affect B uptake and translocation negatively, and two ECM fungal species differ in this respect.

Effect of Pisolithus tinctorious on Physiological and Hormonal Traits in Cistus Plants to Water Deficit: Relationships among Water Status, Photosynthetic Activity and Plant Quality

The inoculation of P. tinctorious alleviated some of the harmful effects of water scarcity in Cistus plants, being its use a sustainable option in gardening or restoration projects.

Contribution of Arbuscular Mycorrhizal Symbiosis to Plant Drought Tolerance: State of the Art

This chapter summarizes, from physiological and molecular points of view, the current knowledge about the mechanisms by which the AM symbiosis is thought to protect host plants against the detrimental effects of water deficit, and the role of fungal hyphae in water uptake and transfer to plant tissues and in modification of soil water retention properties is updated.

Development and Functioning of Mycorrhizal Root Systems under Non-Uniform Rootzone Salinity

The present study investigated the effects of root colonization by arbuscular mycorrhizal fungi on growth and nutrient uptake of tomato and Sudan grass exposed to topsoil salinity through a horizontal split-root setup, and suggested that mycor rhizal date palms grow better and show a higher extent of myCorrhiza fungal root colonization when exposed to partial rootzone drying compared withpartial rootzone salinity.

Ectomycorrhizal inoculation with Pisolithus tinctorius reduces stress induced by drought in cork oak

Results show that inoculation alone had a positive effect on plant height, shoot biomass, shoot basal diameter, and root growth, and under drought, root growth of mycorrhizal plants was significantly increased showing that inoculations was effective in increasing tolerance to drought.

Ectomycorrhizae and tree seedling nitrogen nutrition in forest restoration

This review surveys recent literature on ECM associations of temperate and boreal forest trees as it relates to N-nutrition and restoration of forests on sites where native mycorrhizal communities have been altered or depleted and makes recommendations for including ECM fungi in forest restoration projects.

Functional diversity of mycorrhiza in relation to land-use changes and ecosystem functions

The present study indicates that under low root N concentrations and higher root glucose concentrations EM fungal diversity was enhanced and there is a relationship between forest management, root nitrogen and carbohydrate concentrations in roots as well as EM richness, diversity and community structure.



Aquaporins in poplar: What a difference a symbiont makes!

Measurements of the hydraulic conductance of intact root systems revealed an increased water transport capacity of mycorrhized poplar roots, and indicate that changes in the properties of the plasma membrane as well as those of the apoplast are responsible for the increased root hydraulic Conductance in ectomycorrhizal symbiosis.

Water transfer via ectomycorrhizal fungal hyphae to conifer seedlings

Differences were detected in the water transfer patterns indicated by the deuterium and fluorescent dye tracers, suggesting that the two labels are transported by different mechanisms in the same hyphae and/or that different fungal taxa transfer them via different routes to host plants.

Mycorrhizal Fungi: Highways for Water and Nutrients in Arid Soils

The ultimate importance of mycorrhizae in plant–water relations depends on the drying patterns, the soil pore structure, and the number of hyphal connections extending from the root into the soil.

Structure and function of mycorrhizal rhizomorphs with special reference to their role in water transport

Anastomosing systems of fungal rhizomorphs are found in association with mycorrhizal roots of trees in arid zones1, in soils of temperate deciduous2, coniferous3 and humid tropical4 forests, and even

Arbuscular mycorrhizae and soil/plant water relations

Findings are summarized that support the assertion that colonization of soil may play as important a role as colonization of roots regarding how AM symbiosis affects the water relations of host plants.


Summary The uptake of 32P by excised non-mycorrhizal and mycorrhizal roots of Pinus radiata was examined in solutions adjusted with polyethylene glycol 4000 to water potentials of 0, 005, 01, 0.3,

Effect of ectomycorrhizae on the growth and uptake and transport of 15N-labeled compounds by Pinus tabulaeformis seedlings under water-stressed conditions

The external mycelia of the ectomycorrhizae took up and transported NH4+ and NO3– from the soil to the plant, thereby improving plant nutrition and growth, in addition to helping the plants to avoid the effects of water stress.

Fine roots and ectomycorrhizas as indicators of environmental change

Abstract Human-induced and natural stress factors can affect fine roots and ectomycorrhizas. Therefore they have potential utility as indicators of environmental change. We evaluated, through

Common mycorrhizal networks provide a potential pathway for the transfer of hydraulically lifted water between plants.

The results suggest that the movement of water by CMNs is potentially important to plant survival during drought, and that the functional ecophysiological traits of individual mycorrhizal fungi may be a component of this mechanism.

Ectomycorrhizas increase apoplastic water transport and root hydraulic conductivity in Ulmus americana seedlings

Summary • The extent to which water channel transport is responsible for the observed increases in root water flow of ectomycorrhizal plants is reported here. • To examine the contribution of water