Littérature scientifique sur le sujet « Reproduction végétale »
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Articles de revues sur le sujet "Reproduction végétale"
Marage, Damien, Jean-Claude Rameau et Luc Garraud. « Banque de graines du sol et succession végétale dans les Alpes du Sud : effets des facteurs historiques et écologiques ». Canadian Journal of Botany 84, no 1 (janvier 2006) : 99–111. http://dx.doi.org/10.1139/b05-142.
Texte intégralLOTCHIO, Alain, Aliou DICKO et Armand Kuyéma NATTA. « Impact de la provenance, de la morphologie et du stockage des graines de Lophira lanceolata sur leur germination au Bénin ». BOIS & ; FORETS DES TROPIQUES 353 (1 octobre 2022) : 3–16. http://dx.doi.org/10.19182/bft2022.353.a36994.
Texte intégralMiller, J. Robert, Jean Miller et Scott L. Findholt. « Distribution, population status, nesting phenology, and habitat of the West Indian Woodpecker (<em>Melanerpes superciliaris nyeanus</em>) on San Salvador Island, Bahamas ». Journal of Caribbean Ornithology 31 (24 décembre 2018) : 26–33. http://dx.doi.org/10.55431/jco.2018.31.26-33.
Texte intégralCamus, Audrey. « « Prak engendra Flop » : Graal Flibuste ou la répétition subvertie ». Études littéraires 38, no 2-3 (5 septembre 2007) : 159–71. http://dx.doi.org/10.7202/016351ar.
Texte intégralDemorgon, Jacques. « The Redoubled In-Between between the Cosmos and the Human or the Hidden Interity ». L’Entre-deux et l’Imaginaire, no 37 (30 juin 2016) : 83–95. http://dx.doi.org/10.35562/iris.1405.
Texte intégralDemorgon, Jacques. « The Redoubled In-Between between the Cosmos and the Human or the Hidden Interity ». L’Entre-deux et l’Imaginaire, no 37 (30 juin 2016) : 83–95. http://dx.doi.org/10.35562/iris.1405.
Texte intégralColignon, Pierre, Éric Haubruge, Charles Gaspar et Frédéric Francis. « Effets de la réduction de doses de formulations d’insecticides et de fongicides sur l’insecte auxiliaire non ciblé Episyrphus balteatus [Diptera : Syrphidae] ». Phytoprotection 84, no 3 (15 juin 2004) : 141–48. http://dx.doi.org/10.7202/008491ar.
Texte intégralDigard, J. P., Etienne Landais et Philippe Lhoste. « La crise des sociétés pastorales. Un regard pluridisciplinaire ». Revue d’élevage et de médecine vétérinaire des pays tropicaux 46, no 4 (1 avril 1993) : 683–92. http://dx.doi.org/10.19182/remvt.9426.
Texte intégralTassin, Jacques, Ronald Bellefontaine, Edmond Roger et Christian A. Kull. « Evaluation préliminaire des risques d'invasion par les essences forestières introduites à Madagascar ». BOIS & ; FORETS DES TROPIQUES 299, no 299 (1 mars 2009) : 27. http://dx.doi.org/10.19182/bft2009.299.a20420.
Texte intégralBroyer, Joël, et Josiane Lauranson-Broyer. « Etude de la reproduction sexuée des végétaux dans les prairies de fauche inondables du Val de Saône (Ain) ». Acta Botanica Gallica 143, no 4-5 (janvier 1996) : 353–65. http://dx.doi.org/10.1080/12538078.1996.10515732.
Texte intégralThèses sur le sujet "Reproduction végétale"
Boyer, Catherine. « Conceptualisation de la reproduction végétale à l'école primaire ». Paris 5, 1998. http://www.theses.fr/1998PA05H001.
Texte intégralThis research studies and inquires into the conditions under which the assimilation and construction of scientific knowledge operate for primary school children. For several classes, from first-years infants to second-year primary this developmental study analyses the gradual shift from the everyday situations. It underlines that the inescapable precursor elements of conceptualization-children's initial representations are found to be very distant from scientific concepts and are fraught with very stubborn obstacles. Believed not to be interrelated, these conceptions are mainly expressed at everyday level. Consequently, a break brought about by specific didactic situations is indispensable if a more scientific conception is to be obtained. Questioning, observation and experimentation thus contribute towards this break. In this process the socio-cognitive conflict proves to be crucial and promotes the predominance of scientific operative invariants. The variety of signifiants also plays an important part. As regards accession to a scientific conception, this will come from a development of relationships between the different concepts. However, although the everyday concept is found to be an obstacle, vocabulary also proves to be a source of problems for the young pupil. For any one child one and the same word will awaken different conceptions over time, just as one and the same formulation level out of context will correspond in children's minds to an everyday or scientific conception. It is in fact only by dealing with individual cases, in conjuction with reciprocal relationship, that children's conceptualization can perhaps be understood. The concepts of seed, flower and fruit thus occur in a partial relative order and, if towards the age of 9 conceptualization of vegetable reproduction becomes scientifc, this does not mean that it is yet finalized or stabilized
Villar, Marc. « Incompatibilité interspécifique chez Populus : approches physiologique et biochimique ». Lyon 1, 1987. http://www.theses.fr/1987LYO10008.
Texte intégralGaget, Mireille. « Incompatibilité interspécifique chez Populus : effet Mentor ». Lyon 1, 1988. http://www.theses.fr/1988LYO10012.
Texte intégralJnoud, Najat. « Incompatibilité interspécifique chez Populus : approches cytologique et cytochimique ». Lyon 1, 1991. http://www.theses.fr/1991LYO10056.
Texte intégralDornier, Antoine. « Dynamique et évolution des métapopulations chez les plantes : l'exemple de Crepis sancta (Asteraceae) en milieu urbain ». Montpellier 2, 2008. http://www.theses.fr/2008MON20104.
Texte intégralLandscape heterogeneity induces spatial structure of populations at a given spatiotemporal scale. These populations experiment frequent extinctions that are counterbalanced by colonization events. Metapopulation dynamics determines species viability and population spatial structure. Furthermore, selection pressures in a metapopulation context differ from those in large panmictic populations, in particular due to the transient nature of populations. Small transient populations of Crepis sancta (Asteraceae) around ornamental trees in urban environment have been studied in order to analyze species metapopulation dynamics. From 4 consecutive years occupancy data, a spatially realistic model has been parameterized. Also, genetics markers allowed us to describe dispersal processes (seed and pollen). Factors affecting extinction namely population size, inbreeding and connectivity have been studied. Finally, consequences of heterogeneous densities on mating system have been studied both both theoretically and experimentally. We show that metapopulation framework allows us to describe two general patch dynamic scenarios : a patch dynamic where local dispersal does matter in one site and a second scenario where external colonization account for metapopulation dynamics. Unexpectedly numerous seeds have been found to not come from local reproduction and we hypothesize the existence of a seed bank whose effects remain to be studied. Demographic factors explain extinction and dispersal reduces extinction risk. Finally, we demonstrated the existence of an Allee effect, which underlines the importance of the demographical context on fitness, and we analyzed theoretically its effect on the selection of self-fertilization in a metapopulation
Bittebiere, Anne-Kristel. « La clonalité : un processus majeur de la dynamique spatiale et du fonctionnement des communautés végétales en systèmes prairiaux ». Rennes 1, 2012. https://tel.archives-ouvertes.fr/tel-00725017.
Texte intégralDispersion through clonal growth may be a major process of plant community structuring especially in prairial systems where most species are clonal. These species produce genetically identical ramets organized in a network structure, whose aggregation depends on the species clonal growth strategy. The present thesis aims at analyzing and understanding grassland plant community dynamics based on spatial assembly rules of clonal species and determining its consequences on the community functioning. To achieve these goals, we used complementary experimental and modeling approaches. We demonstrated that clonal growth strategies determine community spatial structure at fine scale, generating a wide range of patterns. The species spatial pattern varied depending on the clonal growth strategies occurring in the community. This variability was suggested to result from a modification of clonal traits in response to the biotic environment. Indeed, we highlighted that the clone is able to adjust its horizontal growth according to its competitor's identity thanks to information collected by ramets. The adaptive nature of this plastic response in competition resistance was dependent on plant structural blue-print and to a lower extent on ontogeny. We also demonstrated that clonal traits had a major role in community functioning by influencing productivity, probably through the spatial patterns they drive. These results have been applied to the setting-up of herbaceous buffer strips and helped to define an optimal sowing with regard to their function of water preservation. The present thesis underlines the importance of processes operating at the clone scale for those operating at the community or the ecosystem scale
Leducq, Jean-Baptiste. « Système de reproduction, dispersion et succès reproducteurs chez une espèce végétale menacée : exemple de Biscutella neustriaca (Brassicaceae), une espèce auto-incompatible et micro-endémique ». Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL10015/document.
Texte intégralIn sexual species, reproduction systems and dispersal could involve in viability of small populations by having directly an impact on individuals’ reproductive success. In plants, reproduction and dispersal are mainly passive processes and thus depend of local density in mates, isolation between populations and genetic relationships among individuals. In Biscutella neustriaca, a micro-endemic plant of the Seine river valley, we highlight a strong genetic isolation between populations corroborated by habitat fragmentation and low dispersal abilities of the species. By using phenotypic and molecular approaches, we determine that B. neustriaca is strictly self-incompatible. In this context of isolation and spatially structured genetic diversity, we wonder to what extent dispersal and self-incompatibility impact individuals’ reproductive successes. Through an ex situ experiment, we highlight both effects of pollen limitation and decrease in local density of compatible mates on maternal reproductive success decrease. In four natural populations, we identify individual reproductive potential and local density of available mates as main factors explaining male and female reproductive successes variability. Genetic factors as inbreeding depression and self-incompatibility also seem to evolve in reproductive successes in some populations. We discuss about importance of considering many factors when acting for conservation in a threatened population, the need to know the reproductive system and dispersal abilities of the species, inseparable from a monitoring of targeted populations, where effects of these factors are only detectable at certain temporal and spatial scales. We illustrate our works by a concrete conservation action in one of the studied populations
Journé, Valentin. « Influence du climat lors de l'investissement des ressources dans la reproduction chez les arbres forestiers : une approche par modélisation mécaniste ». Thesis, Aix-Marseille, 2020. http://theses.univ-amu.fr.lama.univ-amu.fr/200217_JOURNE_229kn950dq423kitgvy940umn_TH.pdf.
Texte intégralGlobal changes affect species distribution and ecosystems functioning due to long term climatic trends and extreme climatic events. Forests are notably subject to massive growth decline and even mortality. One of the major processes of forest dynamics is sexual reproduction, but there are still many uncertainties about the effect of climate on trees reproduction, especially on when and how resources are allocated to pollen and seeds. Reproduction also allows species to persist over generations, through adaptation and migration. The main objective of this thesis is to develop an approach based on resource and phenology modelling, in order to understand and predict climate effects on forest trees reproduction. First, I used statistical model to investigate temporal and spatial variation of fruit production. Second, I quantified the allocation of resources between vegetative versus reproductive functions, with a hierarchical Bayesian model and observation of growth, male and female reproduction over several years. Results allowed us to identify trade-off during floral initiation, and highlighted the importance of resources levels to ensure reproduction. Lastly, I developped a process-based model of reproduction and included it in an existing model of forest functioning (CASTANEA). The reproduction model, which runs from flower initiation to seed maturation, simulates spatial and temporal patterns of seed production. The model was calibrated and validated on silver fir on Mont-Ventoux and used to investigate how climate change will impact fruit production
Scarcelli, Nora. « Structure et dynamique de la diversité d'une plante cultivée à multiplication végétative : le cas des ignames au Bénin ("Dioscorea sp.") ». Phd thesis, Montpellier 2, 2005. http://www.theses.fr/2005MON20070.
Texte intégralMoret, Jacques. « La variation de populations méditerranéennes d'Ornitogales : conséquences au niveau de la systématique et de l'évolution du genre ». Paris 11, 1985. http://www.theses.fr/1985PA112169.
Texte intégralThe variability (in levels, degrees and diversity) of Mediterranean populations of Ornithogalum was studied according to the principles of « synthetic » Systematics (Morphology, Caryosystematics and Cytogenetics, Biology of Reproduction etc. ). The polymorphism of the populations is quite intense and manifests itself on various levels: intra-individual polymorphism of the floral characteristics; inter-individual polymorphism connected with varied modes of reproduction and to the existence of ecads and ecotypes. There are multiple ways of speciation: geographic isolation, polyploidy, restructuration of the caryotype. The most original is exemplified by O. Divergens. This species exhibits a remarkable instability in its caryotype (at the population, individual and organ levels), at the levels of both the vegetative and the reproduction systems. This instability is coupled with a mainly vegetative type of reproduction. The variability of taxons belonging to this genus was evaluated in Morocco through statistical and biological concepts of the species, based on the study of natural and experimental living populations
Livres sur le sujet "Reproduction végétale"
Roland, Douce, et Académie des sciences (France), dir. Le monde végétal : Du génome à la plante entière. Paris : Technique et documentation, 2000.
Trouver le texte intégralPlant breeding systems. London : G. Allen & Unwin, 1986.
Trouver le texte intégralRichards, A. J. Plant breeding systems. 2e éd. London : Chapman & Hall, 1997.
Trouver le texte intégralRichards, A. J. Plant breeding systems. London : Chapman & Hall, 1994.
Trouver le texte intégralRichards, A. J. Plant breeding systems. 2e éd. London : Chapman & Hall, 1997.
Trouver le texte intégralPlant cold acclimation : Methods and protocols. New York : Humana Press, 2014.
Trouver le texte intégralRobert, D. Biologie végétale, volume 3. La reproduction. Doin, 1998.
Trouver le texte intégralDangerous Liaisons ? : When Cultivated Plants Mate with Their Wild Relatives (Syntheses in Ecology and Evolution). The Johns Hopkins University Press, 2005.
Trouver le texte intégralDangerous Liaisons ? : When Cultivated Plants Mate with Their Wild Relatives (Syntheses in Ecology and Evolution). The Johns Hopkins University Press, 2003.
Trouver le texte intégralFaire des sciences à l'école : Cahier n°1. Les végétaux, la reproduction, l'environnement. Canopé - CRDP de Nantes, 2000.
Trouver le texte intégralChapitres de livres sur le sujet "Reproduction végétale"
Scaramuzzi, Igor. « Chapitre 15. Modes de vie, création et reproduction des forêts de castanheiras (Haut Trombetas) ». Dans Voix végétales, 253–66. IRD Éditions, 2023. http://dx.doi.org/10.4000/books.irdeditions.49698.
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