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Long-term agricultural fertilization alters arbuscular mycorrhizal fungal community composition and barley (Hordeum vulgare) mycorrhizal carbon and phosphorus exchange

Williams, Alwyn LU ; Manoharan, Lokeshwaran LU ; Rosenstock, Nicholas P. LU ; Olsson, Pål Axel LU and Hedlund, Katarina LU (2017) In New Phytologist 213(2). p.874-885
Abstract

Agricultural fertilization significantly affects arbuscular mycorrhizal fungal (AMF) community composition. However, the functional implications of community shifts are unknown, limiting understanding of the role of AMF in agriculture. We assessed AMF community composition at four sites managed under the same nitrogen (N) and phosphorus (P) fertilizer regimes for 55 yr. We also established a glasshouse experiment with the same soils to investigate AMF–barley (Hordeum vulgare) nutrient exchange, using carbon (13C) and 33P isotopic labelling. N fertilization affected AMF community composition, reducing diversity; P had no effect. In the glasshouse, AMF contribution to plant P declined with P fertilization, but was... (More)

Agricultural fertilization significantly affects arbuscular mycorrhizal fungal (AMF) community composition. However, the functional implications of community shifts are unknown, limiting understanding of the role of AMF in agriculture. We assessed AMF community composition at four sites managed under the same nitrogen (N) and phosphorus (P) fertilizer regimes for 55 yr. We also established a glasshouse experiment with the same soils to investigate AMF–barley (Hordeum vulgare) nutrient exchange, using carbon (13C) and 33P isotopic labelling. N fertilization affected AMF community composition, reducing diversity; P had no effect. In the glasshouse, AMF contribution to plant P declined with P fertilization, but was unaffected by N. Barley C allocation to AMF also declined with P fertilization. As N fertilization increased, C allocation to AMF per unit of P exchanged increased. This occurred with and without P fertilization, and was concomitant with reduced barley biomass. AMF community composition showed no relationship with glasshouse experiment results. The results indicate that plants can reduce C allocation to AMF in response to P fertilization. Under N fertilization, plants allocate an increasing amount of C to AMF and receive relatively less P. This suggests an alteration in the terms of P–C exchange under N fertilization regardless of soil P status.

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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
agriculture, arbuscular mycorrhizal fungi (AMF), carbon (C), diversity, fertilizer, mutualism, nitrogen (N), phosphorus (P)
in
New Phytologist
volume
213
issue
2
pages
12 pages
publisher
Wiley-Blackwell
external identifiers
  • scopus:84992490274
  • wos:000391452300036
ISSN
0028-646X
DOI
10.1111/nph.14196
language
English
LU publication?
yes
id
56eb17ac-8cad-4c37-83a0-a6647bddd248
date added to LUP
2017-03-17 10:10:20
date last changed
2018-11-21 21:30:47
@article{56eb17ac-8cad-4c37-83a0-a6647bddd248,
  abstract     = {<p>Agricultural fertilization significantly affects arbuscular mycorrhizal fungal (AMF) community composition. However, the functional implications of community shifts are unknown, limiting understanding of the role of AMF in agriculture. We assessed AMF community composition at four sites managed under the same nitrogen (N) and phosphorus (P) fertilizer regimes for 55 yr. We also established a glasshouse experiment with the same soils to investigate AMF–barley (Hordeum vulgare) nutrient exchange, using carbon (<sup>13</sup>C) and <sup>33</sup>P isotopic labelling. N fertilization affected AMF community composition, reducing diversity; P had no effect. In the glasshouse, AMF contribution to plant P declined with P fertilization, but was unaffected by N. Barley C allocation to AMF also declined with P fertilization. As N fertilization increased, C allocation to AMF per unit of P exchanged increased. This occurred with and without P fertilization, and was concomitant with reduced barley biomass. AMF community composition showed no relationship with glasshouse experiment results. The results indicate that plants can reduce C allocation to AMF in response to P fertilization. Under N fertilization, plants allocate an increasing amount of C to AMF and receive relatively less P. This suggests an alteration in the terms of P–C exchange under N fertilization regardless of soil P status.</p>},
  author       = {Williams, Alwyn and Manoharan, Lokeshwaran and Rosenstock, Nicholas P. and Olsson, Pål Axel and Hedlund, Katarina},
  issn         = {0028-646X},
  keyword      = {agriculture,arbuscular mycorrhizal fungi (AMF),carbon (C),diversity,fertilizer,mutualism,nitrogen (N),phosphorus (P)},
  language     = {eng},
  month        = {01},
  number       = {2},
  pages        = {874--885},
  publisher    = {Wiley-Blackwell},
  series       = {New Phytologist},
  title        = {Long-term agricultural fertilization alters arbuscular mycorrhizal fungal community composition and barley (Hordeum vulgare) mycorrhizal carbon and phosphorus exchange},
  url          = {http://dx.doi.org/10.1111/nph.14196},
  volume       = {213},
  year         = {2017},
}