Laurent Leport

Laurent Leport
Université de Rennes 1 | UR1 · UMR INRAE-AgrocampusOuest-University of Rennes 1349 - Institut de génétique, environnement et protection des plantes (IGEPP)

Doctor of Biology

About

55
Publications
6,154
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,972
Citations
Citations since 2016
13 Research Items
964 Citations
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
Introduction
Research in plant water relations and plant respons to abiotic stress

Publications

Publications (55)
Article
Full-text available
The potato is one of the most cultivated crops worldwide, providing an important source of food. The quality of potato tubers relates to their size and dry matter composition and to the absence of physiological defects. It depends on the spatial and temporal coordination of growth and metabolic processes in the major tuber tissues: the cortex, fles...
Article
Full-text available
Potato quality is a major concern for both producers and customers. However, potato tubers are affected by various forms of internal damage with no external symptoms, leading to substantial economic losses. MRI was used as a non-invasive and quantitative method to evaluate internal defects in potato tubers and their evolution during storage. Rust s...
Article
Full-text available
Background Drought is a major consequence of global heating that has negative impacts on agriculture. Potato is a drought-sensitive crop; tuber growth and dry matter content may both be impacted. Moreover, water deficit can induce physiological disorders such as glassy tubers and internal rust spots. The response of potato plants to drought is comp...
Article
Full-text available
Leaf senescence in source leaves leads to the active degradation of chloroplast components [photosystems, chlorophylls, ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco)] and plays a key role in the efficient remobilization of nutrients toward sink tissues. However, the progression of leaf senescence can differentially modify the photosynth...
Preprint
Full-text available
Background: Drought is a major consequence of global heating that has negative impacts on agriculture. Potato is a drought-sensitive crop; tuber growth and dry matter content may both be impacted. Moreover, water deficit can induce physiological disorders such as glassy tubers and internal rust spots. The response of potato plants to drought is com...
Article
Full-text available
Drought is the main abiotic stress worldwide affecting harvest quality and quantity of numerous crops. To enable better water management, low field NMR (nuclear magnetic resonance) relaxometry was assessed as a developmental marker and a new method for early detection of water deficiency. The effect of a foliar biostimulant against water stress was...
Article
Full-text available
Background Low field NMR has been used to investigate water status in various plant tissues. In plants grown in controlled conditions, the method was shown to be able to monitor leaf development as it could detect slight variations in senescence associated with structural modifications in leaf tissues. The aim of the present study was to demonstrat...
Article
Full-text available
Improvement of nutrient use efficiency is a major goal for several crop plants, especially Brassica napus. Indeed, the low nitrogen use efficiency (NUE) in this crop results in negative economic and ecological consequences. The low NUE of oilseed rape is mainly due to low remobilization of nitrogen from vegetative parts to growing organs. Remobiliz...
Article
Full-text available
Winter oilseed rape is characterized by a low N use efficiency related to a weak leaf N remobilization efficiency (NRE) at vegetative stages. By investigating the natural genotypic variability of leaf NRE, our goal was to characterize the relevant physiological traits and the main protease classes associated with an efficient proteolysis and high l...
Article
Full-text available
Oilseed rape is the third largest oleaginous crop in the world but requires high levels of N fertilizer of which only 50% is recovered in seeds. This weak N use efficiency is associated with a low foliar N remobilization, leading to a significant return of N to the soil and a risk of pollution. Contrary to what is observed during senescence in the...
Article
Full-text available
Oilseed rape, a crop requiring a high level of nitogen (N) fertilizers, is characterized by low N use efficiency. To identify the limiting factors involved in the N use efficiency of winter oilseed rape, the response to low N supply was investigated at the vegetative stage in 10 genotypes by using long-term pulse-chase (15)N labelling and studying...
Article
Six BnaProDH1 and two BnaProDH2 genes were identified in Brassica napus genome. The BnaProDH1 genes are mainly expressed in pollen and roots' organs while BnaProDH2 gene expression is associated with leaf vascular tissues at senescence. Proline dehydrogenase (ProDH) catalyzes the first step in the catabolism of proline. The ProDH gene family in oil...
Article
Full-text available
Main conclusion Differential palisade and spongy parenchyma structural changes in oilseed rape leaf were demonstrated. These dismantling processes were linked to early senescence events and associated to remobilization processes. Abstract During leaf senescence, an ordered cell dismantling process allows efficient nutrient remobilization. Howeve...
Conference Paper
Full-text available
Oilseed rape (Brassica napus L.) is the third worldwide oleaginous crop and requires high level of nitrogen (N) fertilizer which only 50% is found in seeds (Schjoerring et al. 1995) revealing a low N Use Efficiency (NUE). This weak NUE is mainly related to a low leaf N Remobilization Efficiency (NRE). In order to improve NRE, our goals were to (i)...
Article
Full-text available
Nitrogen use efficiency (NUE) is relatively low in oilseed rape (Brassica napus L.) due to weak nitrogen remobilization during leaf senescence. Monitoring the kinetics of water distribution associated with the re-organization of cell structures would therefore be valuable to improve characterization of nutrient recycling in leaf tissues and the ass...
Article
Full-text available
Large amounts of nitrogen (N) fertilizers are used in the production of oilseed rape. However, as low-input methods of crop management are introduced crops will need to withstand temporary N deficiency. In temperate areas, oilseed rape will also be affected by frequent drought periods. Here we evaluated the physiological and metabolic impact of nit...
Article
Full-text available
Thellungiella salsuginea, a Brassicaceae species closely related to Arabidopsis thaliana, is tolerant to high salinity. The two species were compared under conditions of osmotic stress to assess the relationships between stress tolerance, the metabolome, water homeostasis and growth performance. A broad range of metabolites were analysed by metabol...
Article
Full-text available
621 RESEARCH T here are two types of chickpea (Cicer arietinum L.), large-seeded kabuli types with a light colored seed coat and small-seeded desi types with a darker seed coat. Seed size in both types of chickpea is frequently reduced by terminal drought when grown under rainfed conditions in Mediterranean-type climatic regions (Davies et al., 199...
Article
Full-text available
Citrulline has been recently shown to behave as a novel compatible solute in the Citrullus lanatus (Cucurbitaceae) growing under desert conditions. In the present study we have investigated some aspects of the relationship which might occur in leaves of melon seedlings, also known to produce citrulline, between the capacity to accumulate this ureid...
Article
Full-text available
51 World population is increasing at an alarming rate and is expected to reach about six billions by the end of year 2050. On the other hand food productivity is decreasing due to the effect of vari-ous abiotic stresses on crop plants (Mahajan and Tuteja 2005). Drought and salinity are becoming particularly widespread in many regions, and may cause...
Article
The eco-physiology of salt tolerance, with an emphasis on K(+) nutrition and proline accumulation, was investigated in the halophyte Thellungiella halophila and in both wild type and eskimo-1 mutant of the glycophyte Arabidopsis thaliana, which differ in their proline accumulation capacity. Plants cultivated in inert sand were challenged for 3 week...
Article
The effect of terminal drought on the dry matter production, seed yield and its components including pod production and pod abortion was investigated in chickpea (Cicer arietinum L.). Two desi (with small, angular and dark brown seeds) and two kabuli (with large, rounded and light coloured seeds) chickpea cultivars differing in seed size were grown...
Article
Elytrigia pycnantha (Godr.) Löve (also named E. aetherica or Elymus athericus) is a monocot species native of salt marshes of the Mont Saint-Michel Bay. Usually found at the landward edge of the bay, this grass plant is now spraying in the middle of the marsh and even at the tidal hat boundaries. In this study, we have outlined some biochemical tra...
Article
The metabolic origin of β-alanine has been assessed in Limonium latifolium, a halotolerant Plumbaginaceae, which accumulates β-alanine betaine as an osmoprotectant. It was already known that β-alanine may act as a substrate for β-alanine betaine synthesis in this species and that propionate and spermidine metabolism may serve as putative ways for β...
Chapter
Full-text available
The aim of this study was to identify the physiological characteristics which may affect the yield of six cool-season grain legume species grown in a water-limited Mediterranean-type climate in Western Australia. The rate of net photosynthesis, stomatal conductance and water relations were measured from flowering to complete leaf senescence in whit...
Article
Full-text available
The ABA concentrations of leaves, roots, soils and transport fluids of chickpea and lupin plants growing in acid (pH=4.8) and alkaline (pH=8.0) soils and an acid soil with an alkaline subsoil and an alkaline soil with an acid subsoil were measured with the aim of explaining the poor growth of narrow-leafed lupins in alkaline soil. The ABA concentra...
Article
Full-text available
Two field experiments were carried out to investigate the effects of terminal drought on chickpea grown under water-limited conditions in the Mediterranean-climatic region of Western Australia. In the first experiment, five desi (small angular seeds) chickpeas and one kabuli (large round seeds) chickpea were grown in the field with and without irri...
Article
Full-text available
The influence of terminal drought on the seed growth of 3 chickpea (Cicer arietinum L.) genotypes was examined in a field experiment at Merredin, Western Australia. Tyson, a small-seeded desi cultivar, ICCV88201, a desi breeding line (sister line to the recently released Sona cultivar) with medium-sized seed, and Kaniva, a kabuli cultivar with larg...
Article
The aim of this study was to identify the physiological characteristics which may affect the yield of six cool-season grain legume species grown in a water-limited Mediterranean-type climate in Western Australia. The rate of net photosynthesis, stomatal conductance and water relations were measured from flowering to complete leaf senescence in whit...
Article
Full-text available
Trans-isomers of cytokinins (CK) are thought to predominate and have greater biological activity than corresponding cis-isomers in higher plants. However, this study demonstrates a system within which the predominant CK are cis-isomers. CK were measured at four developmental stages in developing chickpea (Cicer arietinum L. cultivar Kaniva) seeds b...
Article
The sensitivity of seed composition to drought was compared among three spring glasshouse-grown rapeseed genotypes by applying water shortage treatments at various stages of development. All traits under study associated with the biochemical composition of the seed were drastically modified in plants subjected to drought during flowering. Water sho...
Article
Full-text available
Phosphoenolpyruvate (PEP) carboxylation was measured as dark 14CO2 fixation in leaves and roots (in vivo) or as PEP carboxylase (PEPCase) activity in desalted leaf and roof extracts (in vitro) from Pisum sativum L. cv. Kleine Rheinlnderin. Its relation to the malate content and to the nitrogen source (nitrate or ammonium) was investigated. In tissu...

Network

Cited By

Projects

Projects (2)
Project
The project aims at describing how source and sink leaves of winter oilseed rape can acclimate to moderate drought stress. The project will combine transcriptomic, enzymatic and metabolomic approaches and will develop 13C-INST-MFA fluxomic approaches in collaboration with the P2M2 metabolomic facility of Rennes. The project will also explore the genetic variability associated to this adaptation among Brassicaceae, in order to support potential future applications for plant breeding.
Archived project
Improving Oilseedrape Nitrogen Use efficiency