L4-4318 — Annual report 2013
1.
Mycorrhizal status of an ozone-sensitive poplar clone treated with the antiozonant ethylene diurea

Plants protected by anti-ozonant showed higher total number of fine roots, number of ectomycorrhizal types, Shannon-Weaver diversity index and Species richness index compared to the control plants irrigated with water . The ectomycorrhizal community shifted from contact exploration type in the control to short-distance exploration type in ethylenediurea treated trees. Ozone protectant may beneficially affect the below ground community of mycorrhizal fungi colonising roots of ozone sensitive poplar clone.

COBISS.SI-ID: 3755430
2.
Evaluation of methods to estimate production, biomass and turnover of ectomycorrhizal mycelium in forests soils - a review

Mycorrhizal fungi constitute a considerable sink for carbon in most ecosystems. This carbon is used for building extensive mycelial networks in the soil as well as for metabolic activity related to nutrient uptake. A number of methods have been developed recently to quantify production, standing biomass and turnover of extramatrical mycorrhizal mycelia (EMM) in the field. These methods include minirhizotrons, in-growth mesh bags and cores, and indirect measurements of EMM based on classification of ectomycorrhizal fungi into exploration types. Here we review the state of the art of this methodology and discuss how it can be developed and applied most effectively in the field. Furthermore, we also discuss different ways to quantify fungal biomass based on biomarkers such as chitin, ergosterol and PLFAs, as well as molecular methods, such as qPCR. The evidence thus far indicates that mycorrhizal fungi are key components of microbial biomass in many ecosystems. We highlight the need to extend the application of current methods to focus on a greater range of habitats and mycorrhizal types enabling incorporation of mycorrhizal fungal biomass and turnover into biogeochemical cycling models.

COBISS.SI-ID: 3432102
3.
The production and turnover of extramatrical mycelium of ectomycorrhizal fungi in forest soils: role in carbon cycling

Tansley review: C availability seems to be the key factor determining EMM production and possibly its standing biomass in forests but direct effects of mineral nutrient availability on the EMM can be important. There is great uncertainty about the rate of turnover of EMM. There is increasing evidence that residues of EM fungi play a major role in the formation of stable N and C in SOM, which highlights the need to include mycorrhizal effects in models of global soil C stores.

COBISS.SI-ID: 3568294