A5059397913- Plant nutrient uptake and metabolism
- Legume Nitrogen Fixing Symbiosis
- Seedling growth and survival studies
- Ecology and Vegetation Dynamics Studies
- Potato Plant Research
- Soil Carbon and Nitrogen Dynamics
- Forest ecology and management
- Plant Water Relations and Carbon Dynamics
- Agronomic Practices and Intercropping Systems
- Botany and Plant Ecology Studies
- Nitrogen and Sulfur Effects on Brassica
- Plant Molecular Biology Research
- Mycorrhizal Fungi and Plant Interactions
- Peatlands and Wetlands Ecology
- Tree-ring climate responses
- Plant Micronutrient Interactions and Effects
- Conservation, Biodiversity, and Resource Management
- Geology and Paleoclimatology Research
- Soil erosion and sediment transport
- Plant Stress Responses and Tolerance
- Lichen and fungal ecology
- Photosynthetic Processes and Mechanisms
- Crop Yield and Soil Fertility
- Advanced Data Storage Technologies
- Forest Ecology and Biodiversity Studies
Université Clermont Auvergne
2014-2024
Physique et Physiologie Intégratives de l'Arbre en Environnement Fluctuant
2008-2024
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2018-2024
Agroécologie
2017-2020
Clermont Université
2014-2018
Institut de recherche en horticulture et semences
2017
Institut National de la Recherche Agronomique
2014
Université Nantes Angers Le Mans
2011
Laboratoire d'Ecophysiologie Végétale, Agronomie & nutritions N.C.S
2005-2008
Département Environnement et Agronomie
2008
• Background and Aims Despite its high capacity to take up nitrate from the soil, winter oilseed rape (Brassica napus) is characterized by a very low N recovery in reproductive tissues under field conditions. A significant part of taken lost soil dead leaves during growth cycle. An accurate description dynamics at whole plant level each compartment conditions should lead better understanding allocation B. napus improvements nitrogen harvest index.
Globally, over one-third of irrigated land is affected by salinity, including much the under lowland rice cultivation in tropics, seriously compromising yields this most important crop species. However, there remains an insufficient understanding cellular basis salt tolerance rice. Here, three methods 24Na+ tracer analysis were used to investigate primary Na+ transport at root plasma membrane a salt-tolerant cultivar (Pokkali) and salt-sensitive (IR29). Futile cycling intact roots occurred...
Abstract The use of kinetic equations NO3 - transport systems in oilseed rape (Brassica napus), determined by 15NO3 labeling under controlled conditions, combined with experimental field data from the INRA-Châlons database were used to model uptake during plant growth cycle. quantitative effects different factors such as day/night cycle, ontogenetic stages, root temperature, photosynthetically active radiation, and soil nitrate availability on components constitutive high-affinity systems,...
Oilseed rape (Brassica napus) has often been used as a catch crop to deal with the issue of N leaching, but for this be effective, prediction crop's uptake capability and partitioning is required. The aim work was build compartmental model dynamics in oilseed rape, based on kinetic description uptake, mobilization each organ.In study, logistic exponential equations were fitted relations compartment, especially leaf at node. Data previously obtained from an 15N-labelling field experiment...
Abstract The nitrogen (N) economics of plants are generally described in terms functional traits and how these affect N availability a given environment. However, recent studies have shown that plant symbionts play crucial role economics. A together with its symbiont can be considered as meta‐organism, the holobiont. Plant‐associated shaped by plant, thereby extending plant's phenotype. Decomposers also an important economics, yet usually not included In this review, we show roles both...
In spite of major breakthroughs in the last three decades identification root nitrate uptake transporters plants and associated regulation transport activities, a simplified operational modelling approach for is still lacking. This due mainly to difficulty linking various regulations that act at different levels time on spatial scales. A cross-combination Flow–Force applied influx isotherms experimentally determined environmental planta used model oilseed rape, Brassica napus. contrast...
An updated version of a mechanistic structural–functional model was developed to predict nitrogen (N) uptake throughout the growth cycle by crop winter oilseed rape, Brassica napus, grown under field conditions. The functional component derives from revisited conceptual framework that combines thermodynamic Flow–Force interpretation nitrate isotherms and environmental in planta effects on influx. Estimation root biomass (structural component) is based upon combination mapping along soil...
Background Recently developed genetic and pharmacological approaches have been used to explore NO3−/ethylene signalling interactions how the modifications in root architecture by modulation of ethylene biosynthesis affect nitrate uptake. Key Results Structure–function studies combined with recent chemical genomics highlight non-specificity commonly inhibitors such as AVG (l-aminoethoxyvinylglycine). Indeed, inhibits aminotransferases ACC synthase (ACS) tryptophan aminotransferase (TAA)...
Under field conditions, plants need to optimize nutrient ion and water acquisition in their fluctuating environment. One of the most important variables involved variations uptake processes is temperature. It modifies thermodynamic root diffusion soil throughout day–night ontogenetic cycles. Yet, models nitrogen (N) are built from set values microscopic kinetic parameters, Vm Km, derived a Michaelis–Menten (MM) interpretation isotherms. An isotherm curve depicting response nitrate influx...
Abstract. Stable isotope ratios of hydrogen (δ2H) and oxygen (δ18O) are crucial for studying ecohydrological dynamics in forests. However, most studies confined to single sites, resulting a lack large-scale data understanding tree water uptake. Here, we provide first systematic dataset soil stem xylem collected during two pan-European sampling campaigns at 40 beech (Fagus sylvatica), spruce (Picea abies), or mixed beech-spruce forest sites spring summer 2023 (Lehmann et al., 2024). The is...