Research interests

• Carbon and Nitrogen fluxes within and between trees and shrubs and associated mycorrhizal partners.
• Genetic and physiology of ericoid mycorrhizal fungi.
• Ecology of the Rhizoscyphus / Hymenoscyphus ericae aggregate

Publications

• Grelet, GA; Johnson, D; Paterson, E; Anderson, IC and Alexander, IJ (2009). Reciprocal carbon and nitrogen transfer between an ericaceous dwarf shrub and fungi isolated from Piceirhiza bicolorata ectomycorrhizas. New Phytologist. Grelet 2009 NP Rapid Report 182p359-366 (The definitive version is available at http://www.blackwell-synergy.com/loi/nph).
  
• Grelet, GA; Meharg, AA; Duff EI; , Anderson IC and Alexander IJ (2009). Small genetic differences between ericoid mycorrhizal fungi affect nitrogen uptake by Vaccinium. New Phytologist, 181 (3). 708-718.Grelet 2009 NP181 (The definitive version is available at http://www.blackwell-synergy.com/loi/nph).
  
• Millard, P; Sommerkorn, M and Grelet, GA (2007). Tansley Review: Environmental change and carbon limitation in trees: a biochemical, ecophysiological and ecosystem appraisal. New Phytologist, 175 (1). 11-28.Millard 2007 NP175 (The definitive version is available at http://www.blackwell-synergy.com/loi/nph).
• Millard, P; Wendler, R; Grassi, G; Grelet, GA and Tagliavini, M (2006) Translocation of nitrogen in the xylem of field-grown cherry and poplar trees during remobilization. Tree Physiology, 26 (4). 527-536. [PDF 516KB]

• Grelet, GA, Meharg, AA and Alexander, IJ. (2005) Carbon availability affects N source utilization by Hymenoscyphus ericae. Mycological Research, 109: 469-477. [PDF 1242KB]
• Grelet, GA, Alexander, IJ, Millard, P and Proe, MF (2003). Does morphology or the size of the internal N store determine how Vaccinium spp. respond to spring N supply? Functional Ecology 17. 690-699. [PDF 1248KB]
• Grelet, GA, Alexander IJ, Proe MF, Frossard JS and Millard P (2001) Leaf habit influences nitrogen remobilisation in Vaccinium species. Journal of Experimental Botany. 52. 993-1002. [PDF 176KB]
• Grelet, GA (2001) Remobilisation of N by two heath species: Vaccinium myrtillus (deciduous) and V. vitis-idaea (evergreen) compared. PhD thesis, University of Aberdeen, UK & Université Blaise Pascal, Clermont-Ferrand, France. Includes extensive review on N internal cycling and N use efficiency. [PDF 79KB] and [PDF 584KB]

 

Poster presentation

• Grelet GA, Johnson D, Paterson E, Anderson IC and Alexander IJ (2008). Functional Fungal Bridges Linking Pine Trees and Ericaceous Shrubs - 21st New Phytologist Symposium , the ecology of ectomycorrhizal fungi, Montpellier, France.
• Grelet GA, Vralstad T, Paterson E, Johnson D, Alexander IJ and Anderson IC (2008). The search for shared symbionts between Pine and Vaccinium - ISME12, Cairns, Australia.
• Grelet, GA, Duff, B, Meharg, A, Johnson, D, Anderson, IC & Alexander, IJ (2006) Genetic and functional diversity within the Hymenoscyphus ericae aggregate. 5th International Conference on Mycorrhiza, Granada, Spain. [PDF 1354KB]
• Grelet, GA, Guak, S, Millard, P, Neilsen, D and Neilsen, G (2003) The regulation of nitrate uptake by apple roots. Washington Tree Fruit Research Commission, apple horticulture research review, Penticton BC, Canada.
• Grelet, GA, Millard, P and Alexander, IJ (1998) Storage and remobilisation of nitrogen in relation to carbohydrate partitioning in Vaccinium species. Society of Experimental Biology Annual meeting, York, UK. Abstract published in Journal of Experimental Botany 49s.
• Grelet, GA, Alexander, IJ and Proe, MF (1998) A conceptual model of the internal cycling of N in two woody shrubs. 2^nd International workshop on functional-structural tree models, Clermont-Fd, France.
• Grelet, GA, Millard, P and Alexander, IJ (1997) Nitrogen remobilisation for leaf growth in Vaccinium species. British Ecological Society Winter meeting, Warwick, UK.

 

Platform presentations

• Millard, P; Sommerkorn, M; Grelet, GA (2008). Environmental change and carbon limitation in trees; a biochemical, ecophysiological and ecosystem appraisal. Phytosphere Institute ICG-3, Forschungzentrum Jülich, Germany.
• Grelet GA, Vralstad T, Paterson E, Johnson D, Anderson IC and Alexander IJ (2007). The search for shared symbionts between ectomycorrhizal pine roots and ericoid roots. – BES Annual meeting, Ecology of fungal communities, Manchester, UK.
• Millard, P, Grelet, GA; Guak, S, Neilsen, D and Neilsen, G (2003). The regulation of nitrate uptake by apple roots. Washington Tree Fruit Research Commission, apple horticulture research review, Penticton BC, Canada.
• Grelet, GA, Meharg, AA and Alexander, IJ (2002). Does N utilisation in ericoid association reflect the intraspecific variations in N sources preference by Hymnoscyphus ericae? The Ecological Society of America Annual meeting, Tucson, U.S.A.
• Grelet, GA, Alexander, IJ and Proe, MF (1999). The impact of nitrogen supply on the growth and development of an evergreen and a deciduous heath species. British Ecological Society Winter meeting, Leeds, U.K. Highly commended for best student oral presentation prize.

 

Research experience

• 2005-2009: Post-doctoral Researcher, University of Aberdeen & The Macaulay Institute. “Mycorrhizal interactions in native pinewoods: are ericoid and ectomycorrhizal fungi genetically and functionally distinct?”
• 2002-2003: NSERC Research Fellow, Pacific Agri-Food Research Centre (Summerland B.C., Canada): “The role of soil temperature and root-to-shoot cycling of amino N in nitrate uptake by apple roots”.
• 2001: Post-doctoral Researcher, University of Aberdeen (UK). 'Forms of N used by the association Vaccinium-Hymescyphus: Inter-and intra-specific variations'
• 1995: Research assistant, Biolandes Technologies (France). 'Identification and extraction of plant flavour compounds'

2004 and 2000: Maternity breaks

 

Education & Background

• 2001 PhD 'Remobilisation of N by two heath species: Vaccinium myrtillus (deciduous) and V. vitis-idaea (evergreen) compared', Supervised by Prof Ian Alexander (University of Aberdeen, UK), Dr Michael Proe (The Macaulay Institute, Aberdeen, UK) & Dr Jean-Sylvain Frossard (INRA Clermond-Ferrand, France).
• 1995 MSc 'Temperature affects cellular energy during budbreak in walnut buds', Supervised by Dr Jean-Sylvain Frossard, Bioclimatologie, INRA Clermont-Fd (France) and Prof Michel Gendraud, Université Clermont-Fd II (France).
• 1994 BSc (2.1.) Population Biology and Plant morphogenesis, Université Bordeaux I (France).

 

 

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