Temperature‐sensitive biochemical 18O‐fractionation and humidity‐dependent attenuation factor are needed to predict δ18O of cellulose from leaf water in a grassland ecosystem
| hal.structure.identifier | Technische Universität Munchen - Technical University Munich - Université Technique de Munich [TUM] | |
| hal.structure.identifier | Interactions Sol Plante Atmosphère [UMR ISPA] | |
| dc.contributor.author | HIRL, Regina T. | |
| hal.structure.identifier | Interactions Sol Plante Atmosphère [UMR ISPA] | |
| dc.contributor.author | OGÉE, Jérôme | |
| hal.structure.identifier | Technische Universität Munchen - Technical University Munich - Université Technique de Munich [TUM] | |
| dc.contributor.author | OSTLER, Ulrike | |
| hal.structure.identifier | Technische Universität Munchen - Technical University Munich - Université Technique de Munich [TUM] | |
| dc.contributor.author | SCHÄUFELE, Rudi | |
| hal.structure.identifier | Technische Universität Munchen - Technical University Munich - Université Technique de Munich [TUM] | |
| dc.contributor.author | BACA CABRERA, Juan | |
| hal.structure.identifier | Technische Universität Munchen - Technical University Munich - Université Technique de Munich [TUM] | |
| dc.contributor.author | ZHU, Jianjun | |
| hal.structure.identifier | Technische Universität Munchen - Technical University Munich - Université Technique de Munich [TUM] | |
| dc.contributor.author | SCHLEIP, Inga | |
| hal.structure.identifier | Interactions Sol Plante Atmosphère [UMR ISPA] | |
| dc.contributor.author | WINGATE, Lisa | |
| hal.structure.identifier | Technische Universität Munchen - Technical University Munich - Université Technique de Munich [TUM] | |
| dc.contributor.author | SCHNYDER, Hans | |
| dc.date.accessioned | 2024-04-08T11:52:42Z | |
| dc.date.available | 2024-04-08T11:52:42Z | |
| dc.date.issued | 2021 | |
| dc.identifier.issn | 0028-646X | |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/195493 | |
| dc.description.abstractEn | We explore here our mechanistic understanding of the environmental and physiological processes that determine the oxygen isotope composition of leaf cellulose (δ 18 O cellulose) in a drought-prone, temperate grassland ecosystem. A new allocation-and-growth model was designed and added to an 18 O-enabled soilvegetation-atmosphere transfer model (MuSICA) to predict seasonal (April-October) and multi-annual (2007-2012) variation of δ 18 O cellulose and 18 O-enrichment of leaf cellulose (Δ 18 O cellulose) based on the Barbour-Farquhar model. Modelled δ 18 O cellulose agreed best with observations when integrated over c. 400 growingdegree-days, similar to the average leaf lifespan observed at the site. Over the integration time, air temperature ranged from 7 to 22°C and midday relative humidity from 47 to 73%. Model agreement with observations of δ 18 O cellulose (R 2 = 0.57) and Δ 18 O cellulose (R 2 = 0.74), and their negative relationship with canopy conductance, was improved significantly when both the biochemical 18 O-fractionation between water and substrate for cellulose synthesis (ϵ bio , range 26-30‰) was temperature-sensitive, as previously reported for aquatic plants and heterotrophically grown wheat seedlings, and the proportion of oxygen in cellulose reflecting leaf water 18 O-enrichment (1p ex p x , range 0.23-0.63) was dependent on air relative humidity, as observed in independent controlled experiments with grasses. Understanding physiological information in δ 18 O cellulose requires quantitative knowledge of climatic effects on p ex p x and ϵ bio . | |
| dc.language.iso | en | |
| dc.publisher | Wiley | |
| dc.rights.uri | http://creativecommons.org/licenses/by/ | |
| dc.subject.en | canopy conductance | |
| dc.subject.en | grassland | |
| dc.subject.en | isotope‐ | |
| dc.subject.en | enabled soil– | |
| dc.subject.en | vegetation– | |
| dc.subject.en | atmosphere transfer model (MuSICA) | |
| dc.subject.en | O-18‐ | |
| dc.subject.en | enrichment of cellulose oxygen isotope composition of cellulose | |
| dc.subject.en | perennial ryegrass (Lolium perenne) | |
| dc.subject.en | relative humidity | |
| dc.subject.en | temperature | |
| dc.title.en | Temperature‐sensitive biochemical 18O‐fractionation and humidity‐dependent attenuation factor are needed to predict δ18O of cellulose from leaf water in a grassland ecosystem | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1111/nph.17111 | |
| dc.subject.hal | Sciences de l'environnement | |
| bordeaux.journal | New Phytologist | |
| bordeaux.page | 1-16 | |
| bordeaux.hal.laboratories | Interactions Soil Plant Atmosphere (ISPA) - UMR 1391 | * |
| bordeaux.institution | Bordeaux Sciences Agro | |
| bordeaux.institution | INRAE | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-03114884 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-03114884v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=New%20Phytologist&rft.date=2021&rft.spage=1-16&rft.epage=1-16&rft.eissn=0028-646X&rft.issn=0028-646X&rft.au=HIRL,%20Regina%20T.&OG%C3%89E,%20J%C3%A9r%C3%B4me&OSTLER,%20Ulrike&SCH%C3%84UFELE,%20Rudi&BACA%20CABRERA,%20Juan&rft.genre=article |
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