Leaf respiratory CO2 is 13 C-enriched relative to leaf organic components in five species of C3 plants
• Here, we compared the carbon isotope ratios of leaf respiratory CO2 (δ13 CR ) and leaf organic components (soluble sugar, water soluble fraction, starch, protein and bulk organic matter) in five C3 plants grown in a glasshouse and inside Biosphere 2. One species, Populus deltoides, was grown unde...
| Veröffentlicht in: | The New phytologist. - 1979. - 163(2004), 3 vom: 25. Sept., Seite 499-505 |
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| Weitere Verfasser: | , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2004
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| Zugriff auf das übergeordnete Werk: | The New phytologist |
| Schlagworte: | Journal Article C3 plants Keeling plot carbon isotope dark respiration fractionation |
| Zusammenfassung: | • Here, we compared the carbon isotope ratios of leaf respiratory CO2 (δ13 CR ) and leaf organic components (soluble sugar, water soluble fraction, starch, protein and bulk organic matter) in five C3 plants grown in a glasshouse and inside Biosphere 2. One species, Populus deltoides, was grown under three different CO2 concentrations. • The Keeling plot approach was applied to the leaf scale to measure leaf δ13 CR and these results were compared with the δ13 C of leaf organic components. • In all cases, leaf respiratory CO2 was more 13 C-enriched than leaf organic components. The amount of 13 C enrichment displayed a significant species-specific pattern, but the effect of CO2 treatment was not significant on P. deltoides. • In C3 plant leaves, 13 C-enriched respiratory CO2 appears widespread. Among currently hypothesized mechanisms contributing to this phenomenon, non-statistical carbon isotope distribution within the sugar substrates seems most likely. However, caution should be taken when attempting to predict the δ13 C of leaf respiratory CO2 at the ecosystem scale by upscaling the relationship between leaf δ13 CR and δ13 C of leaf organic components |
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| Beschreibung: | Date Revised 20.04.2021 published: Print Citation Status PubMed-not-MEDLINE |
| ISSN: | 1469-8137 |
| DOI: | 10.1111/j.1469-8137.2004.01153.x |