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Registros recuperados: 15
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A pulse-amplitude modulated fluorescence-based method for assessing the effects of photosystem II herbicides on freshwater periphyton Inra
Dorigo, U.; Leboulanger, C..
A test was developed that measures in vivo chlorophyll a fluorescence variables to assess the apparent sensitivity of freshwater periphytic algae to photosystem II inhibitors. Natural periphytic communities from rivers were collected on artificial substrata, and the effects of short-term exposures to two PSII herbicides (atrazine andisoproturon) on the fluorescence parameters were measured with apulse-amplitude modulated fluorometer. The EC50 for each herbicide were calculated from fluorescence yield indices, and these results were compared to 14C-based primary production measurements on the same communities. The fluorescence-based method appears to give very reliable estimations of EC50 for each pesticide we tested, ranging from 0.46 to5.18 µM and 0.07 to...
Tipo: Journal Article Palavras-chave: PHOTOSYSTEME II; FLUORIMETRIE; CHLOROPHYLLE; METHODE COMMUNITY TOLERANCE; FLUORESCENCE; HERBICIDES; PERIPHYTON; PHOTOSYNTHESIS.
Ano: 2001 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB0200014220090064&uri=/notices/prodinra1/2010/11/
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An in vivo experimental system to study sugar phloem unloading in ripening grape berries during water deficiency stress Inra
Wang, Z.P.; Deloire, A.; Carbonneau, A.; Federspiel, B.; Lopez, F..
An in vivo experimental system-called the 'berry-cup' technique-was developed to study sugar phloem unloading and the accumulation of sugar in ripening grape berries. The berry-cup system consists of a single peeled grape berry immersed in a buffer solution in a cup prepared from a polypropylene syringe. A small cross-incision (2 mm in length) is made on the stylar remnant of a berry during its ripening phase, the skin of the berry then being easily peeled off, exposing the dorsal vascular bundles without damaging either these or the pulp tissue of the berry. The sites of sugar phloem unloading are thus made directly accessible and may be regulated by the buffer solution. In addition, the unloaded photoassimilates are easily transported into the buffer...
Tipo: Journal Article Palavras-chave: BAIE DE RAISIN; SEVE PHLOEMIQUE SIEVE ELEMENT TRANSPORT SOLUTE ACCUMULATION; OSMOTIC ADJUSTMENT; DEVELOPING SEEDS; PHOTOSYNTHESIS; DROUGHT; FIELD; INHIBITOR; METABOLISM; SUCROSE; SUGAR PHLOEM UNLOADING; "BERRY-CUP" TECHNIQUE; RIPENING GRAPE BERRY; INHIBITOR; WATER DEFICIENCY.
Ano: 2003 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20086f8b9f16&uri=/notices/prodinra1/2009/01/
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Diel time-courses of leaf growth in monocot and dicot species: endogenous rhythms and temperature effects Inra
Poiré, R.; Wiese-Klinkenberg, A.; Parent, B.; Mielewczik, M.; Schurr, U.; Tardieu, F.; Walter, A..
Diel (24 h) leaf growth patterns were differently affected by temperature variations and the circadian clock in several plant species. In the monocotyledon Zea mays, leaf elongation rate closely followed changes in temperature. In the dicotyledons Nicotiana tabacum, Ricinus communis, and Flaveria bidentis, the effect of temperature regimes was less obvious and leaf growth exhibited a clear circadian oscillation.These differences were related neither to primary metabolism nor to altered carbohydrate availability for growth. The effect of endogenous rhythms on leaf growth was analysed under continuous light in Arabidopsis thaliana, Ricinus communis, Zea mays, and Oryza sativa. No rythmic growth was observed under continuous light in the two monocotyledons,...
Tipo: Journal Article Palavras-chave: CIRCADIAN CLOCK; ELONGATION; EXPANSION; IMAGE ANALYSIS; PHOTOSYNTHESIS; STARCH; SUCROSE.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010bb27130c&uri=/notices/prodinra1/2010/08/
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Ecophysiological responses of perennial grasses Stipa lagascae and Dactylis glomerata under soil water deficit Inra
Jaballah, S.; Gribaa, A.; Volaire, F.; Ferchichi, A..
Les plantes herbacées pérennes représentent l’une des plus importantes resources mais leur persistence depend de leur aptitude à supporter un deficit hydrique severe. Il est ainsi nécessaire d’étudier la survie des plantes dans des conditions extrêmes pour comprendre les stratégies et les mécanismes des herbacées pérennes des zones arides. L’objectif du présent travail est de comparer les réponses adaptatives de deux espèces Stipa lagascae (cultivar Roemer and Schultz) et Dactylis glomerata (cultivar Kasbah). Nous analysons l’effet du déficit hydrique sur la phénologie et la croissance à travers les caractères physiologiques. On s’est intéressé en particulier à l’étude du taux d’assimilation « A » (µmol/m2/s) et de la conductance stomatique « gs »...
Tipo: Conference Paper Palavras-chave: ESPECE PASTORALE; STIPA LAGASCAE; REGIONS ARIDES PASTORAL SPECIES; ARID AREA; PHENOLOGY; PHOTOSYNTHESIS.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010bd57a7e1&uri=/notices/prodinra1/2010/08/
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Elucidating physiology of plant mediated exchange processes using airborne hyperspectral reflectance measurements in synopsis with eddy covariance data Inra
Eiden, M.; van der Linden, S.; Schween, J.H.; Gerbig, C.; Neininger, B.; Brunet, Y.; Jarosz, N.; Traullé, O.; Geiss, H.; Rascher, U..
The Carbo Europe Regional Experiment Strategy (CERES), conducted between May and June 2005, aims to determine a spatiallyresolved regional balance of carbon dioxide fluxes using different methodological approaches bundled within an internationalframework. In this study we elucidated several meteorological and physiological parameters determining plant mediated exchangeprocesses using airborne hyperspectral reflectance measurements in synopsis with meteorological information like eddy fluxcovariance data. We used an airborne hyperspectral system to record spatial and temporal transects of vegetated areas surroundingflux tower sites in the Bordeaux / Landes Region (France). Alongside hyperspectral measurements a comprehensive range ofmeteorological and...
Tipo: Conference Proceedings Palavras-chave:  REMOTE SENSING; CERES; VEGETATION; PHOTOSYNTHESIS; EDDY COVARIANCE; HYPERSPECTRAL REFLECTANCE; CHLOROPHYLL FLUORESCENCE; CANOPY PHOTOSYNTHESIS.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009b05f19d6&uri=/notices/prodinra1/2011/05/
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Estimation of the reduction in photosynthetic parameters (Vpmax, Vcmax) in the leaves of maize plants exposed to increasing ozone concentrations Inra
Bethenod, O.; Castell, J.F.; Roche, R.; Le Thiec, D.; Leitao, L.; Repellin, A.; ICP, International Cooperative Programme on Effects of Air Pollution on Natural Vegetation and Crops (GBR).
Tipo: Meeting Paper Palavras-chave: PHOTOSYNTHESIS; OZONE; MAIZE;  .
Ano: 2011 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20116c405cf&uri=/notices/prodinra1/2011/06/
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Functional relationships between leaf structure and photosynthetic traits as modulated by irradiance and nutrient availability in a sclerophyllous and a non-sclerophyllous mediterranean oak species Inra
Daas-Ghrib, C.; Montpied, P.; Ksontini, M.; Dreyer, E..
Plasticity of structural and physiological leaf traits elicited by irradiance and soil nutrients was investigated in two sympatric mediterranean oaks: a sclerophyllous (Quercus suber L.) and a non-sclerophyllous species (Q. canariensis Willd.). Seedlings were grown for 2 years in pots in a 2-way crossed factors design. Leaf mass-to-arearatio (LMA) and nitrogen were recorded, and photosynthetic capacity (i.e. the apparent maximal carboxylation rate by rubisco, Vcmax) was derived from response curves ofnet CO2 assimilation (A) versus intercellular CO2 mol fraction (Ci). Structural equation modelling was applied tothe data for disentangling the complex correlation structure between variables. The two species differed significantly inphotosynthetic nitrogen...
Tipo: Journal Article Palavras-chave: CHENE DES CANARIES; XEROPHYTE; RAPPORT MASSE SURFACE FOLIAIRE; INTENSITE LUMINEUSE; ALLOCATION RESSOURCE; TENEUR EN AZOTE; PLASTICITE PHOTOSYNTHETIC NITROGEN USE EFFICIENCY; PNUE; RESPONSES TO IRRADIANCE; LMA; NITROGEN; LEAF AREA; MASS-BASED NITROGEN CONTENT; NUTRIENT AVAILABILITY; QUERCUS CANARIENSIS; MAXIMUM CARBOXYLATION VELOCITY; LMA; NITROGEN; PHOTOSYNTHESIS; STRUCTURAL EQUATION MODELLING .
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2011d57f1f7a&uri=/notices/prodinra1/2011/06/
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Identification, expression, and functional analyses of a thylakoid ATP/ADP carrier from Arabidopsis Inra
Thuswaldner, S.; Lagerstedt, J.O.; Rojas-Stütz, M.; Bouhidel, K.; Der, C.; Leborgne-Castel, N.; Mishra, A.; Marty, F.; Schoefs, B.; Adamska, I.; Persson, B. L.; Spetea, C..
In plants the chloroplast thylakoid membrane is the site of lightdependent photosynthetic reactions coupled to ATP synthesis.The ability of the plant cell to build and alter this membrane system is essential for efficient photosynthesis. A nucleotide translocator homologous to the bovine mitochondrial ADP/ATPcarrier (AAC) was previously found in spinach thylakoids. Here we have identified and characterized a thylakoid ATP/ADP carrier (TAAC) from Arabidopsis. (i) Sequence homology with the bovine AAC and the prediction of chloroplast transit peptides indicated a putative carrier encoded by the At5g01500 gene, as a TAAC. (ii) Transiently expressed TAAC-green fluorescent protein fusion construct was targeted to the chloroplast. Western blotting using a...
Tipo: Journal Article Palavras-chave: ARABIDOPSIS; ADENOSINE TRIPHOSPHATE / ADENOSINE DIPHOSPHATE; CHLOROPLAST; THYLAKOID; THYLAKOID ADENOSINE TRIPHOSPHATE / ADENOSINE DIPHOSPHATE CARRIER; PHOTOSYNTHESIS; THYLAKOID LUMEN.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2008da71603e&uri=/notices/prodinra1/2011/05/
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Impact de l'éclairement des fruits et des feuilles sur le contenu en sucres et en acide ascorbique des tomates Inra
Gautier, H.; Génard, M.; Massot, C.; Stevens, R..
Tipo: Conference Paper Palavras-chave: TENEUR EN SUCRES; GLUCOSE; VITAMINE C SUGAR CONTENT; IRRADIANCE; PHOTOSYNTHESIS; ASCORBIC ACID.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009cbae47ee&uri=/notices/prodinra1/2009/04/
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Inflorescence photosynthate allocation of Chardonnay grapevine (Vitis vinifera L.) fruiting cuttings Inra
Wojnarowiez, G.; Maillard, P.; Brechet, C.; Gross, P.; Clément, C.; Vaillant-Gaveau, N.; Fontaine, F..
Tipo: Meeting Paper Palavras-chave: INFLORESCENCE; PHOTOSYNTHESIS; GRAPEVINE; CO2 ASSIMILATION.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20094e4d7b47&uri=/notices/prodinra1/2009/07/
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Modelling temperature-compensated physiological rates, based on the co-ordination of responses to temperature of developmental processes Inra
Parent, B.; Turc, O.; Gibon, Y.; Tardieu, F..
Temperature fluctuates rapidly and affects all developmental and metabolic processes. This often obscures the effects of developmental trends or of other environmental conditions when temperature fluctuates naturally. A method is proposed for modelling temperature-compensated rates, based on the coordination of temperature responses of developmental processes. In a data set comprising 41 experiments in the greenhouse, growth chamber, or the field, the temperature responses in the range of 6-36 degrees C for different processes were compared in three species, maize, rice, and Arabidopsis thaliana. Germination, cell division, expansive growth rate, leaf initiation, and phenology showed coordinated temperature responses and followed common laws within each...
Tipo: Journal Article Palavras-chave: DEVELOPMENT; ENZYME; GROWTH; MODELLING; PHOTOSYNTHESIS; TEMPERATURE; THERMAL TIME.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201063708b64&uri=/notices/prodinra1/2010/08/
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Oxidative pentose phosphate pathway-dependent sugar sensing as a mechanism for regulation of root ion transporters by photosynthesis Inra
Lejay, L.; Wirth, J.; Pervent, M.; Cross, J.M.F.; Tillard, P.; Gojon, A..
Root ion transport systems are regulated by light and/or sugars, but the signaling mechanisms are unknown. We showed previously that induction of the NRT2.1 NO(3)(-) transporter gene by sugars was dependent on carbon metabolism downstream hexokinase (HXK) in glycolysis. To gain further insights on this signaling pathway and to explore more systematically the mechanisms coordinating root nutrient uptake with photosynthesis, we studied the regulation of 19 light-/sugar-induced ion transporter genes. A combination of sugar, sugar analogs, light, and CO(2) treatments provided evidence that these genes are not regulated by a common mechanism and unraveled at least four different signaling pathways involved: regulation by light per se, by HXK-dependent sugar...
Tipo: Journal Article Palavras-chave: SUGAR REGULATION; ROOT ION TRANSPORT; PHOTOSYNTHESIS; HEXOKINASE; ROOT NITROGEN.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200817f0baa3&uri=/notices/prodinra1/2008/08/
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QTL analysis for leaf gas exchange in an apple progeny grown under atmospheric constraints Inra
Regnard, J.L.; Segura, V.; Merveille, N.; Durel, C.E.; Costes, E..
The capacity of the apple tree to tolerate temporary abiotic constraints was investigated through leaf responses to different vapor pressure deficits (VPD). A ‘Starkrimson’ x ‘Granny Smith’ F1 progeny of 125 full-sibs whip-grafted onto Pajam® 2 rootstocks and pot-cultivated was studied (three replicates). After two months, plants were transferred into a controlled environment chamber ensuring five increasing VPDs, from 0.7 to 2.7 kPa, other conditions remaining constant. Leaf stomatal conductance (gsw), net CO2 assimilation (An) and transpiration (E) rates were measured, and water use efficiency (WUE, An/E) computed. The leaf responses were analyzed through a linear model including genotype as random effect for each VPD level separately. Whatever the VPD,...
Tipo: Conference Paper Palavras-chave: HERITABILITE; PLASTICITE; CONDUCTANCE STOMATIQUE; STOMATE ABIOTIC STRESS; HERITABILITY; MALUS X DOMESTICA; PLASTICITY; QUANTITATIVE TRAIT LOCI; PHOTOSYNTHESIS; STOMATA; TRANSPIRATION; WATER USE EFFICIENCY.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20091f202fdc&uri=/notices/prodinra1/2010/03/
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Sudden increase in atmospheric CO2 concentration reveals strong coupling between shoot carbon uptake and root nutrient uptake in young walnut trees Inra
Delaire, M.; Frak, E.; Sigogne, M.; Adam, B.; Beaujard, F.; Le Roux, X..
Tipo: Journal Article Palavras-chave: CONCENTRATION ELEVEE EN CO2 CALCIUM; ELEVATED [CO2]; MAGNESIUM; JUGLANS NIGRA X JUGLANS MAJOR; NITROGEN; PHOSPORUS; PHOTOSYNTHESIS; POTASSIUM; TRANSPIRATION.
Ano: 2005 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2006221b76fa&uri=/notices/prodinra1/2007/08/
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The chloroplastic thiol reducing systems: dual functions in the regulation of carbohydrate metabolism and regeneration of antioxidant enzymes, emphasis on the poplar redoxin equipment Inra
Chibani, K.; Couturier, J.; Selles, B.; Jacquot, J.P.; Rouhier, N..
The post-translational modification consisting in the formation/reduction of disulfide bonds has been the subject of intense research in plants since the discovery in the 1970s that many chloroplastic enzymes are regulated by light through dithiol–disulfide exchange reactions catalyzed by oxidoreductases called thioredoxins (Trxs). Further biochemical and proteomic studies have considerably increased the number of target enzymes and processes regulated by these mechanisms in many sub-cellular compartments. Recently, glutathionylation, a modification consisting in the reversible formation of a glutathione adduct on cysteine residues, was proposed as an alternative redox regulation mechanism. Glutaredoxins (Grxs), proteins related to Trxs, are efficient...
Tipo: Journal Article Palavras-chave: NADP-MALATE DEHYDROGENASE; METHIONINE SULFOXIDE REDUCTASE; FERREDOXIN-THIOREDOXIN REDUCTASE; GENOME-WIDE ANALYSIS; IRON-SULFUR PROTEIN; ARABIDOPSIS-THALIANA; CHLAMYDOMONAS-REINHARDTII; OXIDATIVE STRESS; GLUTATHIONE-PEROXIDASE; PHOTOOXIDATIVE STRESS; CHLOROPLAST; GLUTAREDOXIN; PHOTOSYNTHESIS; STRESS; THIOREDOXIN.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010751aa923&uri=/notices/prodinra1/2010/10/
Registros recuperados: 15
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