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Pornon André

Enseignant-chercheur
Université Paul Sabatier, Toulouse III

Icone contact Email

Icone telephone 05 61 55 69 36

Thèmes de recherche actuels

  • Réponse du système de reproduction des plantes à la fragmentation des populations
  • Etude de la mosaïque spatiale de la variabilité du système de reproduction de R. ferrugineum : causes et les processus évolutifs impliqués
  • Nutrition azotée et réponses des communautés végétales subalpines à la contrainte azotée

Bibliographie

Delmas C.E.L., Fort T.L.C., Escaravage N. , Pornon A. (2016) Pollen transfer in fragmented plant populations : insight from the pollen loads of pollinators and stigmas in a mass-flowering species. Ecology and Evolution (in press)

Pornon, A. et al. (2016) Using metabarcoding to reveal and quantify plant-pollinator interactions. Sci. Rep. 6, 27282 ; doi : 10.1038/srep27282

Boutin M. , Lamaze T., Couvidat F. and Pornon A. (2015) Subalpine Pyrenees received higher nitrogen deposition than predicted by EMEP and CHIMERE chemistry-transport models. Sci. Rep. 5, 12942 ; doi : 10.1038/ srep12942

Delmas CEL, Cheptou P-O, Escaravage N, Pornon A. (2014) High lifetime inbreeding depression counteracts the reproductive assurance benefit of selfing in a mass-flowering shrub. BMC Evolutionary Biology 2014, 14:243.

Charles M., Pornon A , Lamaze T., Viers J. (2014) Dynamics of 35 trace elements throughout plant organs in the subalpine broad leaf evergreen shrub Rhododendron ferrugineum. Proceedings of the International Academy of Ecology and Environmental Sciences 4(4) : 162-175.

Charles M., Lamaze T., Pornon A , Viers J. (2014) Calcium and potassium dynamics and biopurification in two populations of the subalpine evergreen shrub Rhododendron ferrugineum. Proceedings of the International Academy of Ecology and Environmental Sciences, 2014, 4(2) : 50-6.

Charrier O, Dupont P., Pornon A & Escaravage N. (2014) Microsatellite Marker Analysis Reveals the Complex Phylogeographic History of Rhododendron ferrugineum (Ericaceae) in the Pyrenees. PLOS ONE 9 (3) e92976

Delmas CEL, Escaravage N, Cheptou P-O , Charrier O , Ruzafa S, Winterton P & Pornon A. (2014) Relative impact of mate versus pollinator availability on pollen limitation and outcrossing rates in a mass-flowering species Plant Biology doi:10.1111/plb.12200.

Delmas CEL., Escaravage N. & Pornon A (2014) Massive floral display affects insect visits but not pollinator-mediated pollen transfer in Rhododendron ferrugineum. Plant Biology 16 234–243.

Charrier O, Delmas CEL, Pornon A & Escaravage N (2012) Development of 18 microsatellite markers in Rhododendron ferrugineum (Ericaceae) for investigating genetic structure at margins. Conservation Genetics Resources DOI 10.1007/s12686-012-9831-2.

Delmas CEL, Lhuillier E, Pornon A & Escaravage N (2011). Isolation and characterization of microsatellite Loci in Rhododendron ferrugineum (ericaceae) using Pyrosequencing technology. American Journal of Botany 98 (5) E120-E122.

Escaravage N, Cambecèdes J, Largier G, and Pornon A (2011). Conservation genetics of the rare Pyreneo-Cantabrian endemic Aster pyrenaeus (Asteraceae). AoB Plants doi : 10.1093/aobpla/plr029.

Pornon A, Marty C, Winterton P, Lamaze T (2011) The intriguing paradox of leaf lifespan responses to nitrogen availability. Functional Ecology 25 : 796-801.

Marty C., Lamaze T. & Pornon A. 2010. Leaf life span optimizes annual biomass production rather than plant photosynthetic capacity in an evergreen shrub. New Phytologist 187 : 407–416.

Marty C., Pornon A., Escaravage N., Winterton P. & Lamaze T. 2009. Complex interactions between a legume and two grasses in a subalpine meadow. American Journal of Botany 96 (10):1-7.

Marty C., Pornon A. & Lamaze T. 2009. High NH4+ efflux from roots of the common alpine grass, Festuca nigrescens, at field-relevant concentrations restricts net uptake. Environmental and Experimental Botany 87 : 84-86.

Marty C., Lamaze T. & Pornon A. 2009.Endogenous sink-source interactions and soil N regulate leaf life span in an evergreen shrub. New Phytologist 183 : 1114-1123.

Pornon A., Escaravage N & Lamaze T. 2007. Complementarity in mineral nitrogen use among dominant plant species in a subalpine community. American Journal of Botany 94(11) : 1778–1785.

Pornon A., & Lamaze, T. 2007. Nitrogen resorption and photosynthetic activity over leaf life span in an evergreen shrub, Rhododendron ferrugineum, in a subalpine environment. New Phytologist 175 : 301-310.

Doche B., Franchini S., Pornon A. & Lemperiere G. 2005. Changes of humus features along with a successional gradient of Rhododendron ferrugineum (L.) populations (Subalpine level, Northwestern Alps, France). Arctic, Antarctic and Alpine Research 37 : 454-464.

Pasche F., Armand M., Gouaux P., Lamaze T. & Pornon A. 2004 Are meadows with high ecological and patrimonial value endangered by heathland invasion in the French central Pyrenees ? Biological Conservation 118 : 101-102.

Lamaze T., Pasche F. and Pornon A. 2003. Uncoupling nitrogen requirements for spring growth from root uptake in a young evergreen shrub (Rhododendron ferrugineum). New Phytologist 159 : 637-644.

Pasche F., Pornon A. & Lamaze T. 2002. Do mature leaves provide a net source of nitrogen supporting shoot growth in Rhododendron ferrugineum ? New Phytologist 154, 99-105.


Escaravage N., Flubacker E., Pornon A., Doche B. & Till-Bottraud I. 2001. The stamen dimorphism in Rhododendron ferrugineum (Ericaceae) : development and function. American Journal of Botany. 88 : 68-75.

Pornon A., Escaravage N., Thomas P. & Taberlet P. 2000. Dynamics of genotypic structure in clonal Rhododendron ferrugineum (Ericaceae) populations. Molecular Ecology 9, 1099-1111

Pornon A. & Escaravage N. 1999. Genotypic structure in clonal Rhododendron ferrugineum L. (Ericaceae) populations : origin and maintenance. Plant Ecology141, 145-150.

Escaravage N., Questiau S., Pornon A., Doche B. & Taberlet P. 1998. Clonal diversity in a Rhododendron ferrugineum L. (Ericaceae) population inferred from AFLP markers. Molecular Ecology 7, 975-982.

Pornon A., Escaravage N., Till-Bottraud I. & Doche B. 1997. Variation of reproductive traits in Rhododendron ferrugineum (Ericaceae) populations along a successional gradient. Plant Ecology 130, 1-11.

Escaravage N., Pornon A., Doche B. & Till-Bottraud I. 1997. Breeding system in an alpine species : Rhododendron ferrugineum L (Ericaceae) in the French northern Alps. Canadian Journal of Botany.75, 736-743.

Pornon A., Escaravage N. & Doche B. 1997. Cycle interne de l’azote dans une nanophanérophyte subalpine (Rhododendron ferrugineum L.) se développant sur sol pauvre. Ecologie 29, 403-406.

Doche B., Pornon A. & Escaravage N. 1997. Analyse comparative de quelques aspects de la dynamique et du fonctionnement des landes à Ericacées en fonction de l’altitude (France). Ecologie 28, 293-306.

Pornon A., Bligny R., Gout E. & Doche B. 1996. Growth rates and nutrition status of an open and a closed population of Rhododendron ferrugineum L. in the Northwestern Alps (France). Trees 11, 91-98.

Escaravage N., Pornon A. & Doche B. 1996. Dynamique des populations de Rhododendron ferrugineum (L.) en altitude. (Alpes du Nord-France). Diss. Bot. 258, 103-108.

Escaravage N., Pornon A. & Doche B. 1996. Evolution des potentialités dynamiques des landes à Rhododendron ferrugineum L. avec les conditions de milieu (Etage subalpin des Alpes du nord- France). Ecologie 27, 35-50.

Pornon A.& Doche B. 1995. Age structure and dynamics of Rhododendron ferrugineum L. populations in the French Northwestern Alps. Journal of Vegetation Science 6, 265-272.

Pornon A.& Doche B. 1995. Nitrogen mineralization and nitrification in different colonizing stages of subalpine Rhododendron ferrugineum L. heathlands. C. R. Acad. Sci. Paris, 318, 887-895.

Pornon A. & Doche B. 1995. Influence des populations de Rhododendron ferrugineum L. sur la végétation subalpine (Alpes du Nord-France). Feddes Repertorium 106, 179-191.

Pornon A. 1995. Review de l’ouvrage Arctic and Alpine Biodiversity ; patterns, causes and ecosystem consequences (Ecological Studies, 113 ; Chapin III F.S. & Körner C., eds). Springer-Verlag, Berlin, 1995, 332 p. Acta Oecologica 16, 635.


Doche B. & Pornon A. 1994. Développement des populations de Rhododendron ferrugineum dans les pelouses subalpines (massifs du Taillefer et de Belledonne, Alpes du Nord, France). Revue Valdôtaine Hist. Nat. 1-10, 225-232.

Pornon A.& Doche B. 1994. Dynamics and functioning of Rhododendron ferrugineum subalpine heathlands (Northern Alps, France). In Martin Beniston (ed.), Mountain Environments in Changing Climates : 244-258. Routledge, London.