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: | Dominique Gerant, Richard Joffre, Patrick Gross, Jean Marc Guehl, Michel Chalot, Seraphine Vizoso, Pascale Maillard |
| المساهمون: | Dynamique des Génomes et Adaptation Microbienne (DynAMic), Université de Lorraine (UL)-Institut National de la Recherche Agronomique (INRA), Université de Lorraine (UL), Ecologie et Ecophysiologie Forestières [devient SILVA en 2018] (EEF), Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL), Département Ecologie des Forêts, Prairies et milieux Aquatiques (DEPT EFPA), Institut National de la Recherche Agronomique (INRA), Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut de Recherche pour le Développement (IRD [France-Sud]), Interactions Arbres-Microorganismes (IAM) |
| المصدر: | ResearcherID Tree Physiology Tree Physiology, Oxford University Press (OUP): Policy B-Oxford Open Option B, 2008, 28 (11), pp.1729-1739. ⟨10.1093/treephys/28.11.1729⟩ |
| مصطلحات موضوعية: | 0106 biological sciences, Perennial plant, Nitrogen, Physiology, Starch, QUERCUS ROBUR, chemistry.chemical_element, Plant Science, Plant Roots, 010603 evolutionary biology, 01 natural sciences, CHENE, Quercus, chemistry.chemical_compound, Animal science, Human fertilization, Dry weight, [SDV.SA.SF]Life Sciences [q-bio]/Agricultural sciences/Silviculture, forestry, NITROGENE, CARBON STORAGE, Botany, Pedunculate, Fertilizers, 13C, CARBON REMOBILIZATION, Plant Stems, NITROGEN STORAGE, 15N, Carbon Dioxide, 15. Life on land, NITROGEN REMOBILIZATION, Carbon, Plant Leaves, chemistry, Shoot, Carbon dioxide, ELEVATED CO2, 010606 plant biology & botany |
| 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. |
| تدمد: | 0829-318X 1758-4469 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5359bc6a5f04c3e4ca26ec16f157c3aTest http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000260855200014&KeyUID=WOS:000260855200014Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....f5359bc6a5f04c3e4ca26ec16f157c3a |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 0829318X 17584469 |
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