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Carbon dynamics in mycorrhizal symbioses is linked to carbon costs and phosphorus benefits

Olsson, Pål Axel LU ; Rahm, Jannice LU and Aliasgharzad, Nasser LU (2010) In FEMS Microbiology Ecology 72(1). p.123-131
Abstract
Abstract The nutrient and carbon (C) allocation dynamics in mycorrhizal hyphal networks cause variation in costs and benefits for individual plants and fungi and influence the productivity, diversity and C cycling in ecosystems. We manipulated light and phosphorus (P) availability in a pot experiment with Trifolium subterraneum colonised by the arbuscular mycorrhizal (AM) fungus Glomus intraradices. Stable (13)C-labelling was used to trace assimilated CO(2) to the mycorrhizal fungus in roots and soil using compound-specific isotope ratio mass spectrometry. We used the neutral lipid fatty acid 16:1omega5 as a signature for AM fungal storage lipids. Both P and shading reduced the AM fungal lipid accumulation in the intraradical mycelium,... (More)
Abstract The nutrient and carbon (C) allocation dynamics in mycorrhizal hyphal networks cause variation in costs and benefits for individual plants and fungi and influence the productivity, diversity and C cycling in ecosystems. We manipulated light and phosphorus (P) availability in a pot experiment with Trifolium subterraneum colonised by the arbuscular mycorrhizal (AM) fungus Glomus intraradices. Stable (13)C-labelling was used to trace assimilated CO(2) to the mycorrhizal fungus in roots and soil using compound-specific isotope ratio mass spectrometry. We used the neutral lipid fatty acid 16:1omega5 as a signature for AM fungal storage lipids. Both P and shading reduced the AM fungal lipid accumulation in the intraradical mycelium, while only P reduced the amount of lipids in the extraradical mycelium. Recently assimilated plant C was only allocated to the mycorrhizal fungus to a small extent when plant mycorrhizal benefit was reduced by P fertilization, while increasing the plant C cost by shading did not reduce the C flow to the fungus. These results are of importance for our conception of mycorrhizal dynamics during periods of shade in nature. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
FEMS Microbiology Ecology
volume
72
issue
1
pages
123 - 131
publisher
Elsevier
external identifiers
  • wos:000275328100010
  • scopus:77949289135
ISSN
1574-6941
DOI
10.1111/j.1574-6941.2010.00833.x
project
BECC
language
English
LU publication?
yes
id
cd8d8f64-47e3-4a49-a1de-5ebf0d6bd5bf (old id 1540617)
date added to LUP
2010-02-03 14:40:17
date last changed
2018-07-01 03:47:09
@article{cd8d8f64-47e3-4a49-a1de-5ebf0d6bd5bf,
  abstract     = {Abstract The nutrient and carbon (C) allocation dynamics in mycorrhizal hyphal networks cause variation in costs and benefits for individual plants and fungi and influence the productivity, diversity and C cycling in ecosystems. We manipulated light and phosphorus (P) availability in a pot experiment with Trifolium subterraneum colonised by the arbuscular mycorrhizal (AM) fungus Glomus intraradices. Stable (13)C-labelling was used to trace assimilated CO(2) to the mycorrhizal fungus in roots and soil using compound-specific isotope ratio mass spectrometry. We used the neutral lipid fatty acid 16:1omega5 as a signature for AM fungal storage lipids. Both P and shading reduced the AM fungal lipid accumulation in the intraradical mycelium, while only P reduced the amount of lipids in the extraradical mycelium. Recently assimilated plant C was only allocated to the mycorrhizal fungus to a small extent when plant mycorrhizal benefit was reduced by P fertilization, while increasing the plant C cost by shading did not reduce the C flow to the fungus. These results are of importance for our conception of mycorrhizal dynamics during periods of shade in nature.},
  author       = {Olsson, Pål Axel and Rahm, Jannice and Aliasgharzad, Nasser},
  issn         = {1574-6941},
  language     = {eng},
  number       = {1},
  pages        = {123--131},
  publisher    = {Elsevier},
  series       = {FEMS Microbiology Ecology},
  title        = {Carbon dynamics in mycorrhizal symbioses is linked to carbon costs and phosphorus benefits},
  url          = {http://dx.doi.org/10.1111/j.1574-6941.2010.00833.x},
  volume       = {72},
  year         = {2010},
}