High temporal resolution tracing of photosynthate carbon from the tree canopy to forest soil microorganisms
(2008) In New Phytologist 177(1). p.220-228- Abstract
- Half of the biological activity in forest soils is supported by recent tree photosynthate, but no study has traced in detail this flux of carbon from the canopy to soil microorganisms in the field. Using (CO2)-C-13, we pulse-labelled over 1.5 h a 50-m(2) patch of 4-m-tall boreal Pinus sylvestris forest in a 200-m(3) chamber. Tracer levels peaked after 24 h in soluble carbohydrates in the phloem at a height of 0.3 m, after 2-4 d in soil respiratory efflux, after 4-7 d in ectomycorrhizal roots, and after 2-4 d in soil microbial cytoplasm. Carbon in the active pool in needles, in soluble carbohydrates in phloem and in soil respiratory efflux had half-lives of 22, 17 and 35 h, respectively. Carbon in soil microbial cytoplasm had a half-life of... (More)
- Half of the biological activity in forest soils is supported by recent tree photosynthate, but no study has traced in detail this flux of carbon from the canopy to soil microorganisms in the field. Using (CO2)-C-13, we pulse-labelled over 1.5 h a 50-m(2) patch of 4-m-tall boreal Pinus sylvestris forest in a 200-m(3) chamber. Tracer levels peaked after 24 h in soluble carbohydrates in the phloem at a height of 0.3 m, after 2-4 d in soil respiratory efflux, after 4-7 d in ectomycorrhizal roots, and after 2-4 d in soil microbial cytoplasm. Carbon in the active pool in needles, in soluble carbohydrates in phloem and in soil respiratory efflux had half-lives of 22, 17 and 35 h, respectively. Carbon in soil microbial cytoplasm had a half-life of 280 h, while the carbon in ectomycorrhizal root tips turned over much more slowly. Simultaneous labelling of the soil with (NH4+)-N-15 showed that the ectomycorrhizal roots, which were the strongest sinks for photosynthate, were also the most active sinks for soil nitrogen. These observations highlight the close temporal coupling between tree canopy photosynthesis and a significant fraction of soil activity in forests. (Less)
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https://lup.lub.lu.se/record/4644091
- author
- publishing date
- 2008
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- carbon, forests, mycorrhiza, photosynthesis, plant allocation, Scots, pine, soil microorganisms
- in
- New Phytologist
- volume
- 177
- issue
- 1
- pages
- 220 - 228
- publisher
- Wiley-Blackwell
- external identifiers
-
- wos:000251416600022
- scopus:36849024556
- ISSN
- 1469-8137
- DOI
- 10.1111/j.1469-8137.2007.02238.x
- language
- English
- LU publication?
- no
- id
- f1f2ecc1-fafb-4bf1-b4b5-990f15be6ed9 (old id 4644091)
- date added to LUP
- 2016-04-01 11:33:18
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- 2022-04-20 18:35:27
@article{f1f2ecc1-fafb-4bf1-b4b5-990f15be6ed9,
abstract = {{Half of the biological activity in forest soils is supported by recent tree photosynthate, but no study has traced in detail this flux of carbon from the canopy to soil microorganisms in the field. Using (CO2)-C-13, we pulse-labelled over 1.5 h a 50-m(2) patch of 4-m-tall boreal Pinus sylvestris forest in a 200-m(3) chamber. Tracer levels peaked after 24 h in soluble carbohydrates in the phloem at a height of 0.3 m, after 2-4 d in soil respiratory efflux, after 4-7 d in ectomycorrhizal roots, and after 2-4 d in soil microbial cytoplasm. Carbon in the active pool in needles, in soluble carbohydrates in phloem and in soil respiratory efflux had half-lives of 22, 17 and 35 h, respectively. Carbon in soil microbial cytoplasm had a half-life of 280 h, while the carbon in ectomycorrhizal root tips turned over much more slowly. Simultaneous labelling of the soil with (NH4+)-N-15 showed that the ectomycorrhizal roots, which were the strongest sinks for photosynthate, were also the most active sinks for soil nitrogen. These observations highlight the close temporal coupling between tree canopy photosynthesis and a significant fraction of soil activity in forests.}},
author = {{Hogberg, P. and Hogberg, M. N. and Gottlicher, S. G. and Betson, N. R. and Keel, S. G. and Metcalfe, Dan and Campbell, C. and Schindlbacher, A. and Hurry, V. and Lundmark, T. and Linder, S. and Nasholm, T.}},
issn = {{1469-8137}},
keywords = {{carbon; forests; mycorrhiza; photosynthesis; plant allocation; Scots; pine; soil microorganisms}},
language = {{eng}},
number = {{1}},
pages = {{220--228}},
publisher = {{Wiley-Blackwell}},
series = {{New Phytologist}},
title = {{High temporal resolution tracing of photosynthate carbon from the tree canopy to forest soil microorganisms}},
url = {{http://dx.doi.org/10.1111/j.1469-8137.2007.02238.x}},
doi = {{10.1111/j.1469-8137.2007.02238.x}},
volume = {{177}},
year = {{2008}},
}