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Growth of ectomycorrhizal fungi in drained peatland forests with variable P and K availability

Potila, Hannamaria; Wallander, Håkan LU and Sarjala, Tytti (2009) In Plant and Soil 316(1-2). p.139-150
Abstract
The aim of this study was to investigate how the biomass of extramatrical mycorrhizal mycelia (EMM) is influenced by the addition of different phosphorus (P), potassium (K) and PK fertilizers in peatland forests with variable P and K availability. Four fertilizers were used: apatite, biotite, Rauta-PK (TM) (apatite and ferrosulphate) and a test fertilizer (50% apatite and 50% recycled iron phosphate). Forest plots with four different types of nutrient balance (deficient P and deficient K, deficient P and sufficient K, sufficient P and deficient K, and sufficient P and sufficient K) were studied. The effects on EMM biomass and ectomycorrhizal (EM) biomass in roots were estimated by ergosterol and phospholipid fatty acid (PLFA) analysis... (More)
The aim of this study was to investigate how the biomass of extramatrical mycorrhizal mycelia (EMM) is influenced by the addition of different phosphorus (P), potassium (K) and PK fertilizers in peatland forests with variable P and K availability. Four fertilizers were used: apatite, biotite, Rauta-PK (TM) (apatite and ferrosulphate) and a test fertilizer (50% apatite and 50% recycled iron phosphate). Forest plots with four different types of nutrient balance (deficient P and deficient K, deficient P and sufficient K, sufficient P and deficient K, and sufficient P and sufficient K) were studied. The effects on EMM biomass and ectomycorrhizal (EM) biomass in roots were estimated by ergosterol and phospholipid fatty acid (PLFA) analysis using in-growth mesh bags. Nutrients and rare-earth elements in EM roots surrounding the mesh bags were quantified and used as indicators of nutrient transport by the EMM in the mesh bags. The biomass of EMM was enhanced by P, K and PK deficiency of the trees, and EM fungal biomass in the roots was increased by P deficiency. The test fertilizer enhanced EMM biomass in all the plots studied, whereas the other fertilizers did not have any significant effect. No significant interactions between the P and K availability of host and mycelial fertilizer response could be detected. Deficiency of P or K or both in needles did not affect the concentrations of rare-earth elements in the tree roots. Earlier results from laboratory experiments have shown reduced carbon allocation to EM fungi under K deficiency, but this was not the case in these mature forests. Instead, we observed increased EMM biomass in response to both P and K deficiency. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
deficiency, P, K deficiency, Ergosterol, Extramatrical mycorrhizal mycelia, Phospholipid fatty acids (PLFA), Peatland
in
Plant and Soil
volume
316
issue
1-2
pages
139 - 150
publisher
Springer
external identifiers
  • wos:000263175300013
  • scopus:59649111489
ISSN
0032-079X
DOI
10.1007/s11104-008-9766-2
project
Ectomycorrhizal fungi and apatite weathering
language
English
LU publication?
yes
id
61ae00b4-1b0a-451f-b8df-d59e0984fab8 (old id 1372715)
date added to LUP
2009-05-08 14:17:51
date last changed
2017-09-10 04:18:34
@article{61ae00b4-1b0a-451f-b8df-d59e0984fab8,
  abstract     = {The aim of this study was to investigate how the biomass of extramatrical mycorrhizal mycelia (EMM) is influenced by the addition of different phosphorus (P), potassium (K) and PK fertilizers in peatland forests with variable P and K availability. Four fertilizers were used: apatite, biotite, Rauta-PK (TM) (apatite and ferrosulphate) and a test fertilizer (50% apatite and 50% recycled iron phosphate). Forest plots with four different types of nutrient balance (deficient P and deficient K, deficient P and sufficient K, sufficient P and deficient K, and sufficient P and sufficient K) were studied. The effects on EMM biomass and ectomycorrhizal (EM) biomass in roots were estimated by ergosterol and phospholipid fatty acid (PLFA) analysis using in-growth mesh bags. Nutrients and rare-earth elements in EM roots surrounding the mesh bags were quantified and used as indicators of nutrient transport by the EMM in the mesh bags. The biomass of EMM was enhanced by P, K and PK deficiency of the trees, and EM fungal biomass in the roots was increased by P deficiency. The test fertilizer enhanced EMM biomass in all the plots studied, whereas the other fertilizers did not have any significant effect. No significant interactions between the P and K availability of host and mycelial fertilizer response could be detected. Deficiency of P or K or both in needles did not affect the concentrations of rare-earth elements in the tree roots. Earlier results from laboratory experiments have shown reduced carbon allocation to EM fungi under K deficiency, but this was not the case in these mature forests. Instead, we observed increased EMM biomass in response to both P and K deficiency.},
  author       = {Potila, Hannamaria and Wallander, Håkan and Sarjala, Tytti},
  issn         = {0032-079X},
  keyword      = {deficiency,P,K deficiency,Ergosterol,Extramatrical mycorrhizal mycelia,Phospholipid fatty acids (PLFA),Peatland},
  language     = {eng},
  number       = {1-2},
  pages        = {139--150},
  publisher    = {Springer},
  series       = {Plant and Soil},
  title        = {Growth of ectomycorrhizal fungi in drained peatland forests with variable P and K availability},
  url          = {http://dx.doi.org/10.1007/s11104-008-9766-2},
  volume       = {316},
  year         = {2009},
}