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Uptake of Sr-87 from microcline and biotite by ectomycorrhizal fungi in a Norway spruce forest

Wallander, Håkan LU orcid ; Hagerberg, David and Åberg, G (2006) In Soil Biology & Biochemistry 38(8). p.2487-2490
Abstract
Ectomycorrhizal (EM) fungi growing in symbiosis with tree seedlings have been found in laboratory experiments to stimulate weathering and the uptake of nutrients from silicate minerals. In the present study, we used the natural abundance of strontium isotopes to confirm that these fungi obtain strontium from biotite and microcline under field conditions. Minerals enriched in radiogenic Sr-87 were introduced into fungal in-growth mesh bags and placed under a 5-10 cm thick humus layer developed on boulders in a Norway spruce (Picea abies (L.) Karst) forest in south-western Sweden. EM root tips were sampled above the mesh bags and the Sr-87/Sr-86 ratio was used to calculate the fraction of Sr in the root tips that originated from the... (More)
Ectomycorrhizal (EM) fungi growing in symbiosis with tree seedlings have been found in laboratory experiments to stimulate weathering and the uptake of nutrients from silicate minerals. In the present study, we used the natural abundance of strontium isotopes to confirm that these fungi obtain strontium from biotite and microcline under field conditions. Minerals enriched in radiogenic Sr-87 were introduced into fungal in-growth mesh bags and placed under a 5-10 cm thick humus layer developed on boulders in a Norway spruce (Picea abies (L.) Karst) forest in south-western Sweden. EM root tips were sampled above the mesh bags and the Sr-87/Sr-86 ratio was used to calculate the fraction of Sr in the root tips that originated from the minerals. In the EM root tips sampled above the mesh bags containing the different minerals, 1.5% of the Sr originated from biotite and 6.4% from microcline. The amount of Sr was more than 300 times higher in the mesh bags containing microcline than in those containing biotite, indicating that proportionally more Sr was released from the biotite. This study demonstrates that EM fungi have the potential to take up measurable amounts of nutrients, such as Ca and K, from microcline and biotite in the field. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Soil Biology & Biochemistry
volume
38
issue
8
pages
2487 - 2490
publisher
Elsevier
external identifiers
  • wos:000240183900049
  • scopus:33746661056
ISSN
0038-0717
DOI
10.1016/j.soilbio.2006.02.002
language
English
LU publication?
yes
id
c46b5537-45cd-4858-aa06-a59f9099a5c2 (old id 162675)
date added to LUP
2016-04-01 17:01:41
date last changed
2021-05-25 04:50:13
@article{c46b5537-45cd-4858-aa06-a59f9099a5c2,
  abstract     = {Ectomycorrhizal (EM) fungi growing in symbiosis with tree seedlings have been found in laboratory experiments to stimulate weathering and the uptake of nutrients from silicate minerals. In the present study, we used the natural abundance of strontium isotopes to confirm that these fungi obtain strontium from biotite and microcline under field conditions. Minerals enriched in radiogenic Sr-87 were introduced into fungal in-growth mesh bags and placed under a 5-10 cm thick humus layer developed on boulders in a Norway spruce (Picea abies (L.) Karst) forest in south-western Sweden. EM root tips were sampled above the mesh bags and the Sr-87/Sr-86 ratio was used to calculate the fraction of Sr in the root tips that originated from the minerals. In the EM root tips sampled above the mesh bags containing the different minerals, 1.5% of the Sr originated from biotite and 6.4% from microcline. The amount of Sr was more than 300 times higher in the mesh bags containing microcline than in those containing biotite, indicating that proportionally more Sr was released from the biotite. This study demonstrates that EM fungi have the potential to take up measurable amounts of nutrients, such as Ca and K, from microcline and biotite in the field.},
  author       = {Wallander, Håkan and Hagerberg, David and Åberg, G},
  issn         = {0038-0717},
  language     = {eng},
  number       = {8},
  pages        = {2487--2490},
  publisher    = {Elsevier},
  series       = {Soil Biology & Biochemistry},
  title        = {Uptake of Sr-87 from microcline and biotite by ectomycorrhizal fungi in a Norway spruce forest},
  url          = {http://dx.doi.org/10.1016/j.soilbio.2006.02.002},
  doi          = {10.1016/j.soilbio.2006.02.002},
  volume       = {38},
  year         = {2006},
}