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Uptake of P from apatite by Pinus sylvestris seedlings colonised by different ectomycorrhizal fungi

Wallander, Håkan LU (2000) In Plant and Soil 218(1-2). p.249-256
Abstract
The role of ectomycorrhizal (EM) fungi in increasing apatite dissolution was tested in a pot system with Pinus sylvestris (L.) seedlings growing in a sand/peat mixture. Non-mycorrhizal seedlings and seedlings inoculated with one of three different isolates of EM fungi were grown for 210 days in pots divided into a root-containing and a root-free compartment. The EM mycelium was allowed to colonise the root-free compartment, to which apatite had been added as a P source in half of the pots. All mineral nutrients except P were supplied in the form of a balanced nutrient solution. Seedlings grown with apatite as their P source grew significantly better and had higher P concentrations (1.1-1.5 mg/g) compared with seedlings growing without any... (More)
The role of ectomycorrhizal (EM) fungi in increasing apatite dissolution was tested in a pot system with Pinus sylvestris (L.) seedlings growing in a sand/peat mixture. Non-mycorrhizal seedlings and seedlings inoculated with one of three different isolates of EM fungi were grown for 210 days in pots divided into a root-containing and a root-free compartment. The EM mycelium was allowed to colonise the root-free compartment, to which apatite had been added as a P source in half of the pots. All mineral nutrients except P were supplied in the form of a balanced nutrient solution. Seedlings grown with apatite as their P source grew significantly better and had higher P concentrations (1.1-1.5 mg/g) compared with seedlings growing without any P source (0.6-1.0 mg/g), indicating that they were able to use apatite-P. A weathering budget based on P uptake indicated that 6.7-18.9 mg apatite was weathered per pot which corresponds to 0.3-0.9% of the added apatite. A similar budget based on Sr uptake indicated that the apatite weathering rate was lower (0.13-0.3%). One Suillus variegatus isolate and an unidentified fungus had a significant positive influence on the dissolution of apatite, while another S. variegatus isolate had colonised roots poorly and did not influence weathering significantly. Oxalic acid was detected in root-free soil and was especially abundant in compartments colonised by S. variegatus. The concentration of oxalic acid was correlated to the concentration of phosphate in the soil solution of root-free soil, indicating that oxalic acid influences apatite dissolution. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Plant and Soil
volume
218
issue
1-2
pages
249 - 256
publisher
Springer
external identifiers
  • scopus:0034014402
ISSN
0032-079X
DOI
10.1023/A:1014936217105
language
English
LU publication?
yes
id
e3d9c1a0-3403-430a-bf9a-4b57369d3c73 (old id 147039)
date added to LUP
2007-06-29 15:03:13
date last changed
2017-08-06 03:51:25
@article{e3d9c1a0-3403-430a-bf9a-4b57369d3c73,
  abstract     = {The role of ectomycorrhizal (EM) fungi in increasing apatite dissolution was tested in a pot system with Pinus sylvestris (L.) seedlings growing in a sand/peat mixture. Non-mycorrhizal seedlings and seedlings inoculated with one of three different isolates of EM fungi were grown for 210 days in pots divided into a root-containing and a root-free compartment. The EM mycelium was allowed to colonise the root-free compartment, to which apatite had been added as a P source in half of the pots. All mineral nutrients except P were supplied in the form of a balanced nutrient solution. Seedlings grown with apatite as their P source grew significantly better and had higher P concentrations (1.1-1.5 mg/g) compared with seedlings growing without any P source (0.6-1.0 mg/g), indicating that they were able to use apatite-P. A weathering budget based on P uptake indicated that 6.7-18.9 mg apatite was weathered per pot which corresponds to 0.3-0.9% of the added apatite. A similar budget based on Sr uptake indicated that the apatite weathering rate was lower (0.13-0.3%). One Suillus variegatus isolate and an unidentified fungus had a significant positive influence on the dissolution of apatite, while another S. variegatus isolate had colonised roots poorly and did not influence weathering significantly. Oxalic acid was detected in root-free soil and was especially abundant in compartments colonised by S. variegatus. The concentration of oxalic acid was correlated to the concentration of phosphate in the soil solution of root-free soil, indicating that oxalic acid influences apatite dissolution.},
  author       = {Wallander, Håkan},
  issn         = {0032-079X},
  language     = {eng},
  number       = {1-2},
  pages        = {249--256},
  publisher    = {Springer},
  series       = {Plant and Soil},
  title        = {Uptake of P from apatite by Pinus sylvestris seedlings colonised by different ectomycorrhizal fungi},
  url          = {http://dx.doi.org/10.1023/A:1014936217105},
  volume       = {218},
  year         = {2000},
}