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Do nutrient additions alter carbon sink strength of ectomycorrhizal fungi?

Bidartondo, MI; Ek, H; Wallander, Håkan LU and Söderström, Bengt LU (2001) In New Phytologist 151(2). p.543-550
Abstract
Carbon sink strength differences are examined here between ectomycorrhizal fungi in interaction with additions of ammonium and apatite (a phosphorus- and calcium-containing mineral). Pinus muricata associated with Paxillus involutus and four suilloid isolates (Suillus pungens and members of three Rhizopogon section Amylopogon species groups) were used in microcosm nutrient addition experiments. The associations differed in ectomycorrhizal biomass, mycelial growth rate, biomass and respiration. P. involutus produced the lowest biomass of ectomycorrhizal connections to P. muricata, but it consumed proportionally more carbon per connection and transferred more than twice as much ammonium to the host per unit mycorrhizal biomass. Paxillus also... (More)
Carbon sink strength differences are examined here between ectomycorrhizal fungi in interaction with additions of ammonium and apatite (a phosphorus- and calcium-containing mineral). Pinus muricata associated with Paxillus involutus and four suilloid isolates (Suillus pungens and members of three Rhizopogon section Amylopogon species groups) were used in microcosm nutrient addition experiments. The associations differed in ectomycorrhizal biomass, mycelial growth rate, biomass and respiration. P. involutus produced the lowest biomass of ectomycorrhizal connections to P. muricata, but it consumed proportionally more carbon per connection and transferred more than twice as much ammonium to the host per unit mycorrhizal biomass. Paxillus also colonized the soil more rapidly and intensely than the other fungi, but its mycelial respiration was lowest. Ammonium and apatite addition resulted in a marked increase in respiration and mycelial biomass, respectively, by the suilloid fungi. The high carbon cost of ammonium uptake is suggested as one explanation for reduced sporocarp production and mycelial growth by ectomycorrhizal fungi commonly found after high levels of nitrogen addition. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
New Phytologist
volume
151
issue
2
pages
543 - 550
publisher
Wiley-Blackwell
external identifiers
  • scopus:0034900092
ISSN
1469-8137
DOI
10.1046/j.1469-8137.2001.00180.x
language
English
LU publication?
yes
id
c1ec8363-d0b3-4d37-8146-77f027018277 (old id 146950)
date added to LUP
2007-06-29 09:05:10
date last changed
2018-03-04 03:30:27
@article{c1ec8363-d0b3-4d37-8146-77f027018277,
  abstract     = {Carbon sink strength differences are examined here between ectomycorrhizal fungi in interaction with additions of ammonium and apatite (a phosphorus- and calcium-containing mineral). Pinus muricata associated with Paxillus involutus and four suilloid isolates (Suillus pungens and members of three Rhizopogon section Amylopogon species groups) were used in microcosm nutrient addition experiments. The associations differed in ectomycorrhizal biomass, mycelial growth rate, biomass and respiration. P. involutus produced the lowest biomass of ectomycorrhizal connections to P. muricata, but it consumed proportionally more carbon per connection and transferred more than twice as much ammonium to the host per unit mycorrhizal biomass. Paxillus also colonized the soil more rapidly and intensely than the other fungi, but its mycelial respiration was lowest. Ammonium and apatite addition resulted in a marked increase in respiration and mycelial biomass, respectively, by the suilloid fungi. The high carbon cost of ammonium uptake is suggested as one explanation for reduced sporocarp production and mycelial growth by ectomycorrhizal fungi commonly found after high levels of nitrogen addition.},
  author       = {Bidartondo, MI and Ek, H and Wallander, Håkan and Söderström, Bengt},
  issn         = {1469-8137},
  language     = {eng},
  number       = {2},
  pages        = {543--550},
  publisher    = {Wiley-Blackwell},
  series       = {New Phytologist},
  title        = {Do nutrient additions alter carbon sink strength of ectomycorrhizal fungi?},
  url          = {http://dx.doi.org/10.1046/j.1469-8137.2001.00180.x},
  volume       = {151},
  year         = {2001},
}