دورية أكاديمية
Do elevation of CO2 concentration and nitrogen fertilization alter storage and remobilization of carbon and nitrogen in pedunculate oak saplings ?
| العنوان: | Do elevation of CO2 concentration and nitrogen fertilization alter storage and remobilization of carbon and nitrogen in pedunculate oak saplings ? |
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| المؤلفون: | Vizoso, Séraphine, Gerant, Dominique, Guehl, Jean-Marc, J.-M., Joffre, Richard, Chalot, Michel, M., Gross, Patrick, Maillard, Pascale |
| المساهمون: | Dynamique des Génomes et Adaptation Microbienne (DynAMic), Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL), Ecologie et Ecophysiologie Forestières devient SILVA en 2018 (EEF), Département Ecologie des Forêts, Prairies et milieux Aquatiques (DEPT EFPA), Institut National de la Recherche Agronomique (INRA), Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud )-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Interactions Arbres-Microorganismes (IAM) |
| المصدر: | ISSN: 0829-318X. |
| بيانات النشر: | HAL CCSD Oxford University Press (OUP) |
| سنة النشر: | 2008 |
| مصطلحات موضوعية: | 13C, CARBON REMOBILIZATION, CARBON STORAGE, ELEVATED CO2, NITROGEN REMOBILIZATION, CHENE, 15N, NITROGEN STORAGE, QUERCUS ROBUR, NITROGENE, [SDV.SA.SF]Life Sciences [q-bio]/Agricultural sciences/Silviculture, forestry |
| الوصف: | International audience ; Soil nitrogen can alter storage and remobilization of carbon and nitrogen in forest trees and affect growth responses to elevated carbon dioxide concentration ([CO2]).We investigated these effects in oak saplings (Quercus robur L.) exposed for two years to ambient or twice ambient [CO2]in combination with low- (LN, 0.6 mmol N l –1 ) or high-nitrogen (HN, 6.1 mmol N l –1 ) fertilization. Autumn N retranslocation efficiency from senescing leaves was less in HN saplings than in LNsaplings, but about 15%of saplingNwas lost to the litter. During the dormant season, nonstructural carbohydrates made up 20 to 30% of the dry mass of perennial organs. Starch was stored mainly in large roots where it represented 35–46% of drymass.Accumulation of starch increased in large roots in re- sponse to LN but was unaffected by elevated [CO2]. The HN treatment resulted in high concentrations of N-soluble com- pounds, and this effect was reduced by elevated [CO2], which decreased soluble protein N (–17%) and amino acid N (–37%) concentrations in theHNsaplings.Carbon andNreserveswere labeled with 13 C and 15 N, respectively, at the end of the first year. In the second year, about 20%of labeled C and 50%of la- beledNwas remobilized for spring growth in all treatments.At the end of leaf expansion, 50–60% of C in HN saplings origi- nated from assimilation versus only 10–20% in LN saplings. In HN saplings only, N uptake occurred, and some newly as- similated N was allocated to new shoots. Through effects on the C and N content of perennial organs, elevated [CO2] and HN increased remobilization capacity, thereby supporting multiple shoot flushes, which increased leaf area and subse- quent C acquisition in a positive feedback loop. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | hal-02665821; https://hal.inrae.fr/hal-02665821Test; https://hal.inrae.fr/hal-02665821/documentTest; https://hal.inrae.fr/hal-02665821/file/28-11-1729.pdfTest; PRODINRA: 27642 |
| DOI: | 10.1093/treephys/28.11.1729 |
| الإتاحة: | https://doi.org/10.1093/treephys/28.11.1729Test https://hal.inrae.fr/hal-02665821Test https://hal.inrae.fr/hal-02665821/documentTest https://hal.inrae.fr/hal-02665821/file/28-11-1729.pdfTest |
| حقوق: | http://hal.archives-ouvertes.fr/licences/copyrightTest/ ; info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.9E74650D |
| قاعدة البيانات: | BASE |
| DOI: | 10.1093/treephys/28.11.1729 |
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