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Metabolism is a maj...
Metabolism is a major driver of hydrogen isotope fractionation recorded in tree‐ring glucose of Pinus nigra
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- Wieloch, Thomas, 1979- (author)
- Umeå universitet,Institutionen för medicinsk kemi och biofysik
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- Grabner, Michael (author)
- Institute of Wood Technology and Renewable Materials, University of Natural Resources and Life Sciences, Vienna, Austria
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- Augusti, Angela (author)
- Research Institute on Terrestrial Ecosystems, National Research Council, Porano, Italy
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- Serk, Henrik, 1980- (author)
- Umeå universitet,Institutionen för medicinsk kemi och biofysik
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- Ehlers, Ina, 1984- (author)
- Umeå universitet,Institutionen för medicinsk kemi och biofysik
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- Yu, Jun, 1962- (author)
- Umeå universitet,Institutionen för matematik och matematisk statistik,Mathematical Statistics
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- Schleucher, Jürgen, Professor (author)
- Umeå universitet,Institutionen för medicinsk kemi och biofysik
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(creator_code:org_t)
- 2022-02-26
- 2022
- English.
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In: New Phytologist. - : John Wiley & Sons. - 0028-646X .- 1469-8137. ; 234:2, s. 449-461
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https://umu.diva-por... (primary) (Raw object)
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Abstract
Subject headings
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- Stable isotope abundances convey valuable information about plant physiological processes and underlying environmental controls. Central gaps in our mechanistic understanding of hydrogen isotope abundances impede their widespread application within the plant and biogeosciences.To address these gaps, we analysed intramolecular deuterium abundances in glucose of Pinus nigra extracted from an annually resolved tree-ring series (1961–1995).We found fractionation signals (i.e. temporal variability in deuterium abundance) at glucose H1 and H2 introduced by closely related metabolic processes. Regression analysis indicates that these signals (and thus metabolism) respond to drought and atmospheric CO2 concentration beyond a response change point. They explain ≈ 60% of the whole-molecule deuterium variability. Altered metabolism is associated with below-average yet not exceptionally low growth.We propose the signals are introduced at the leaf level by changes in sucrose-to-starch carbon partitioning and anaplerotic carbon flux into the Calvin–Benson cycle. In conclusion, metabolism can be the main driver of hydrogen isotope variation in plant glucose.
Subject headings
- NATURVETENSKAP -- Biologi -- Botanik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Botany (hsv//eng)
Keyword
- anaplerotic flux
- Calvin–Benson cycle
- change point
- glucose-6-phosphate shunt
- hydrogen stable isotopes
- intramolecular isotope analysis
- oxidative pentose phosphate pathway
- sucrose-tostarch carbon partitioning
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Wieloch, Thomas, ...
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Grabner, Michael
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Augusti, Angela
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Serk, Henrik, 19 ...
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Ehlers, Ina, 198 ...
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Yu, Jun, 1962-
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Schleucher, Jürg ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Botany
- Articles in the publication
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New Phytologist
- By the university
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Umeå University