Explicitly accounting for needle sugar pool size crucial for predicting intra‐seasonal dynamics of needle carbohydrates δ <sup>18</sup> O and δ <sup>13</sup> C
| hal.structure.identifier | Natural Resources Institute Finland [LUKE] | |
| dc.contributor.author | LEPPÄ, Kersti | |
| hal.structure.identifier | Natural Resources Institute Finland [LUKE] | |
| hal.structure.identifier | Helsingin yliopisto = Helsingfors universitet = University of Helsinki | |
| dc.contributor.author | TANG, Yu | |
| hal.structure.identifier | Interactions Sol Plante Atmosphère [UMR ISPA] | |
| dc.contributor.author | OGÉE, Jérôme | |
| hal.structure.identifier | Natural Resources Institute Finland [LUKE] | |
| dc.contributor.author | LAUNIAINEN, Samuli | |
| hal.structure.identifier | Université de Bâle = University of Basel = Basel Universität [Unibas] | |
| dc.contributor.author | KAHMEN, Ansgar | |
| hal.structure.identifier | Helsingin yliopisto = Helsingfors universitet = University of Helsinki | |
| dc.contributor.author | KOLARI, Pasi | |
| hal.structure.identifier | Natural Resources Institute Finland [LUKE] | |
| dc.contributor.author | SAHLSTEDT, Elina | |
| hal.structure.identifier | Swiss Federal Institute for Forest, Snow and Landscape Research WSL | |
| dc.contributor.author | SAURER, Matthias | |
| hal.structure.identifier | Helsingin yliopisto = Helsingfors universitet = University of Helsinki | |
| dc.contributor.author | SCHIESTL‐AALTO, Pauliina | |
| hal.structure.identifier | Natural Resources Institute Finland [LUKE] | |
| dc.contributor.author | RINNE‐GARMSTON, Katja | |
| dc.date.accessioned | 2024-04-08T11:43:48Z | |
| dc.date.available | 2024-04-08T11:43:48Z | |
| dc.date.issued | 2022-06-24 | |
| dc.identifier.issn | 0028-646X | |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/195123 | |
| dc.description.abstractEn | We explore needle sugar isotopic compositions (δ 18 O and δ 13 C) in boreal Scots pine (Pinus sylvestris) over two growing seasons. A leaf-level dynamic model driven by environmental conditions and based on current understanding of isotope fractionation processes was built to predict δ 18 O and δ 13 C of two hierarchical needle carbohydrate pools, accounting for the needle sugar pool size and the presence of an invariant pinitol pool. Model results agreed well with observed needle water δ 18 O, δ 18 O and δ 13 C of needle water-soluble carbohydrates (sugars + pinitol), and needle sugar δ 13 C (R 2 = 0.95, 0.84, 0.60, 0.73, respectively). Relative humidity (RH) and intercellular to ambient CO 2 concentration ratio (C i /C a) were the dominant drivers of δ 18 O and δ 13 C variability, respectively. However, the variability of needle sugar δ 18 O and δ 13 C was reduced on diel and intra-seasonal timescales, compared to predictions based on instantaneous RH and C i /C a , due to the large needle sugar pool, which caused the signal formation period to vary seasonally from 2 d to more than 5 d. Furthermore, accounting for a temperature-sensitive biochemical 18 Ofractionation factor and mesophyll resistance in 13 C-discrimination were critical. Interpreting leaf-level isotopic signals requires understanding on time integration caused by mixing in the needle sugar pool. | |
| dc.language.iso | en | |
| dc.publisher | Wiley | |
| dc.rights.uri | http://creativecommons.org/licenses/by/ | |
| dc.subject.en | dynamic modeling | |
| dc.subject.en | needle sugar | |
| dc.subject.en | oxygen isotope | |
| dc.subject.en | photosynthesis | |
| dc.subject.en | Scots pine (Pinus sylvestris) | |
| dc.subject.en | boreal forest | |
| dc.subject.en | carbon isotope | |
| dc.title.en | Explicitly accounting for needle sugar pool size crucial for predicting intra‐seasonal dynamics of needle carbohydrates δ <sup>18</sup> O and δ <sup>13</sup> C | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1111/nph.18227 | |
| dc.subject.hal | Sciences de l'environnement | |
| bordeaux.journal | New Phytologist | |
| bordeaux.page | 2044 - 2060 | |
| bordeaux.volume | 236 | |
| bordeaux.hal.laboratories | Interactions Soil Plant Atmosphere (ISPA) - UMR 1391 | * |
| bordeaux.issue | 6 | |
| bordeaux.institution | Bordeaux Sciences Agro | |
| bordeaux.institution | INRAE | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-04115056 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-04115056v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=New%20Phytologist&rft.date=2022-06-24&rft.volume=236&rft.issue=6&rft.spage=2044%20-%202060&rft.epage=2044%20-%202060&rft.eissn=0028-646X&rft.issn=0028-646X&rft.au=LEPP%C3%84,%20Kersti&TANG,%20Yu&OG%C3%89E,%20J%C3%A9r%C3%B4me&LAUNIAINEN,%20Samuli&KAHMEN,%20Ansgar&rft.genre=article |
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