Performance of four ectomycorrhizal fungi on organic and inorganic nitrogen sources

Baar, J.; Comini, B.; Elferink, M. Oude; Kuyper, Th.W.

doi:10.1017/s0953756296002912

Cited by 37 publications

(15 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Restoration of the ectomycorrhizal communities may have implications for tree growth and forest health. Various studies have shown that ectomycorrhizal fungi differ in the ability to take up organic and inorganic nutrients [23–25]. An increase in diversity of ectomycorrhizal symbionts, as observed in the sod‐cut plots, presumably results in higher diversity of functions varying from nutrient uptake to protection against pathogens.…”

Section: Discussionmentioning

confidence: 99%

Molecular analysis of ectomycorrhizal basidiomycete communities in a Pinus sylvestris L. stand reveals long-term increased diversity after removal of litter and humus layers

Smit

Veenman

Baar

2003

FEMS Microbiology Ecology

View full text Add to dashboard Cite

The number of fruiting bodies of ectomycorrhizal species in pine forests in The Netherlands has decreased dramatically in recent decades. This decrease has been attributed to an increase in nitrogen deposition and the accumulation of litter and humus. The effects of sod cutting and the removal of litter and humus, to restore ectomycorrhizal diversity in a Scots pine forest in Dwingeloo, The Netherlands, were investigated previously from 1990 to 1993. Removal of the litter and humus resulted in a significant increase in the numbers of species and fruiting bodies of ectomycorrhizal fungi. However, until now all data were obtained by counting fruiting bodies and the effects on mycelial development below ground were not assessed. To investigate hyphal development, DNA was extracted from bulk soil and polymerase chain reaction products were obtained by amplification using basidiomycete-specific internal transcribed spacer (ITS) primers. The differences in diversity between the control plots and the treated plots were analyzed using denaturing gradient gel electrophoresis. To assess the species composition and differences, ITS regions of the amplified fragments were cloned and sequenced. Sequences were compared with sequences from GenBank and from fruiting bodies collected from the same plots. Data indicated increased below-ground ectomycorrhizal diversity in the plots that had been subjected to removal of the litter and humus layers.

show abstract

Section: Discussionmentioning

confidence: 99%

Molecular analysis of ectomycorrhizal basidiomycete communities in a Pinus sylvestris L. stand reveals long-term increased diversity after removal of litter and humus layers

Smit

Veenman

Baar

2003

FEMS Microbiology Ecology

View full text Add to dashboard Cite

show abstract

“…Carbon and nutrient content of the agar medium can have large effects on fractal dimension. For example, four ectomycorrhizal species had a fractal dimension of almost 2 on a basal medium designed to give good growth of these species, but between 1.2 and 1.79 when glucose content was reduced by a half or three-quarters [37].…”

Section: Mycelial Fungimentioning

confidence: 99%

Fractal Geometry and Microorganisms in the Environment

Boddy

Donnelly

2008

Biophysical Chemistry of Fractal Structures and Processes in Environmental Systems

View full text Add to dashboard Cite

“…Mycorrhiza-induced PNL is both an effect of the ecosystem N supply rate and of the species composition of the mycorrhizal assemblage. Despite a large interest in the ways in which different ECM fungi respond to N availability (Baar et al, 1997;Gorissen & Kuyper, 2000;Lilleskov et al, 2001Lilleskov et al, , 2002Cudlin et al, 2007;Fransson et al, 2007), the interaction between increased C and N availability for different ECM fungi has received only little attention.…”

Section: Introductionmentioning

confidence: 99%

Ectomycorrhizal fungi associated with Pinus sylvestris seedlings respond differently to increased carbon and nitrogen availability: implications for ecosystem responses to global change

Alberton

Kuyper

2009

Global Change Biology

View full text Add to dashboard Cite

The ectomycorrhizal (ECM) symbiosis can cause both positive and negative feedback with trees under elevated CO 2 . Positive feedback arises if the additional carbon (C) increases both nutrient uptake by the fungus and nutrient transfer to the plant, whereas negative feedback results from increased nutrient uptake and immobilization by the fungus and reduced transfer to the plant. Because species of ECM fungi differ in their C and nitrogen (N) demand, understanding fungal species-specific responses to variation in C and N supply is essential to predict impacts of global change. We investigated fungal species-specific responses of ECM Scots pine (Pinus sylvestris) seedlings under ambient and elevated CO 2 (350 or 700 lL L À1 CO 2 ) and under low and high mineral N availability. Each seedling was associated with one of the following ECM species: Hebeloma cylindrosporum, Laccaria bicolor and Suillus bovinus. The experiment lasted 103 days. During the final 27 days, seedlings were labeled with 14 CO 2 and 15 N. Most plant and fungal parameters were significantly affected by fungal species, CO 2 level and N supply. Interactions between fungal species and CO 2 were also regularly significant. At low N availability, elevated CO 2 had the smallest impact on the photosynthetic performance of seedlings inoculated with H. cylindrosporum and the largest impact on seedlings with S. bovinus. At ambient CO 2 , increasing N supply had the smallest impact on seedlings inoculated with S. bovinus and the largest on seedlings inoculated with H. cylindrosporum. At low N availability, extraradical hyphal length increased after doubling CO 2 level, but this was significant only for L. bicolor. At ambient CO 2 , increasing N levels reduced hyphal length for both H. cylindrosporum and S. bovinus, but not for L. bicolor. We discuss the potential interplay of two major elements of global change, elevated CO 2 and increased N availability, and their effects on plant growth. We conclude that increased N supply potentially relieves mycorrhiza-induced progressive N limitation under elevated CO 2 .

show abstract

Performance of four ectomycorrhizal fungi on organic and inorganic nitrogen sources

Cited by 37 publications

References 22 publications

Molecular analysis of ectomycorrhizal basidiomycete communities in a Pinus sylvestris L. stand reveals long-term increased diversity after removal of litter and humus layers

Molecular analysis of ectomycorrhizal basidiomycete communities in a Pinus sylvestris L. stand reveals long-term increased diversity after removal of litter and humus layers

Fractal Geometry and Microorganisms in the Environment

Ectomycorrhizal fungi associated with Pinus sylvestris seedlings respond differently to increased carbon and nitrogen availability: implications for ecosystem responses to global change

Contact Info

Product

Resources

About