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Tracking carbon from the atmosphere to the rhizosphere

Olsson, Pål Axel LU and Johnson, Nancy LU (2005) In Ecology Letters 8(12). p.1264-1270
Abstract
Turnover rates of arbuscular mycorrhizal (AM) fungi may influence storage of soil organic carbon (SOC). We examined the longevity of AM hyphae in monoxenic cultures; and we also used C-13 incorporation into signature fatty acids to study C dynamics in a mycorrhizal symbiosis involving Glomus intraradices and Plantago lanceolata. C-13 enrichment of signature fatty acids showed rapid transfer of plant assimilates to AM fungi and a gradual release of C from roots to rhizosphere bacteria, but at a much slower rate. Furthermore, most C assimilated by AM fungi remained 32 days after labelling. These findings indicate that C-13 labelled fatty acids can be used to track C flux from the atmosphere to the rhizosphere and that retention of C in AM... (More)
Turnover rates of arbuscular mycorrhizal (AM) fungi may influence storage of soil organic carbon (SOC). We examined the longevity of AM hyphae in monoxenic cultures; and we also used C-13 incorporation into signature fatty acids to study C dynamics in a mycorrhizal symbiosis involving Glomus intraradices and Plantago lanceolata. C-13 enrichment of signature fatty acids showed rapid transfer of plant assimilates to AM fungi and a gradual release of C from roots to rhizosphere bacteria, but at a much slower rate. Furthermore, most C assimilated by AM fungi remained 32 days after labelling. These findings indicate that C-13 labelled fatty acids can be used to track C flux from the atmosphere to the rhizosphere and that retention of C in AM fungal mycelium may contribute significantly to SOC. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Plantago lanceolata, intraradices, Glomus, carbon cycling, C-13, arbuscular mycorrhiza, bacteria, signature fatty acids, stable isotope
in
Ecology Letters
volume
8
issue
12
pages
1264 - 1270
publisher
Wiley-Blackwell
external identifiers
  • wos:000233313500003
  • scopus:28644446225
ISSN
1461-023X
DOI
10.1111/j.1461-0248.2005.00831.x
language
English
LU publication?
yes
id
f7829756-6b62-423d-b33e-53551dbd1599 (old id 213228)
date added to LUP
2007-10-05 11:37:27
date last changed
2017-10-22 03:50:15
@article{f7829756-6b62-423d-b33e-53551dbd1599,
  abstract     = {Turnover rates of arbuscular mycorrhizal (AM) fungi may influence storage of soil organic carbon (SOC). We examined the longevity of AM hyphae in monoxenic cultures; and we also used C-13 incorporation into signature fatty acids to study C dynamics in a mycorrhizal symbiosis involving Glomus intraradices and Plantago lanceolata. C-13 enrichment of signature fatty acids showed rapid transfer of plant assimilates to AM fungi and a gradual release of C from roots to rhizosphere bacteria, but at a much slower rate. Furthermore, most C assimilated by AM fungi remained 32 days after labelling. These findings indicate that C-13 labelled fatty acids can be used to track C flux from the atmosphere to the rhizosphere and that retention of C in AM fungal mycelium may contribute significantly to SOC.},
  author       = {Olsson, Pål Axel and Johnson, Nancy},
  issn         = {1461-023X},
  keyword      = {Plantago lanceolata,intraradices,Glomus,carbon cycling,C-13,arbuscular mycorrhiza,bacteria,signature fatty acids,stable isotope},
  language     = {eng},
  number       = {12},
  pages        = {1264--1270},
  publisher    = {Wiley-Blackwell},
  series       = {Ecology Letters},
  title        = {Tracking carbon from the atmosphere to the rhizosphere},
  url          = {http://dx.doi.org/10.1111/j.1461-0248.2005.00831.x},
  volume       = {8},
  year         = {2005},
}