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  Dynamics and Expression of plant Genomes
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Teams of the APE department « Adaptation of Plants to the Environment » study the answers to environmental restraints on the physiological, metabolic and developmental point of view using mainly genetic, genomic and molecular approaches. The department is focussed on physical (abiotic) restraints as nitrogen availability limitation and/or water, cold, osmotic stress… Our aim is to understand what is the onset of mechanisms responding to these restraints and what genes are controlling these answers and its natural variability. Integration analysis of these regulations at the whole plant level and the following of parameters which govern plant growth (leaf or root level) and also the onset of productivity or fitness are studied. We are mainly working on the model plant Arabidopsis thaliana and on the agronomical important crop: maize. APE possess competences at different levels and particularly on nitrogen metabolism and its recycling, water use efficiency, quantitative genetics, natural variation analysis and phloem signalisation…

 

Groups

The « Management of nitrogen and crops productivity » team tries to identify the limiting steps of absorption, assimilation and recycling of nitrogen during growth and plant development in general and of cereals more precisely. The general objective is to better understand and improve Nitrogen Use Efficiency (NUE) in maize and wheat.

The « Nitrogen-Pathogen Interactions» (NPI) team studies the mechanisms and the genetic control of the adaptation of Arabidopsis thaliana’s response to the infection by necrotrophic pathogens in conditions of nitrogen limitation

The « Phloem, transport and signalisation» team studies proteins of the phloem playing a role in sieve flux regulation in vascular tissues and on sugar distribution. Proteins role in stress adaptation, in plant development and architecture are equally studied.

The «Nitrogen Use, Transport and signaling» (NUTS) team studies via a molecular physiology approach, growth and plant metabolism, from the root to the seed grown in different conditions of nitrogen nutrition. Efforts are focussed on nitrate and nitrite transport in whole plant and on signalling of nitrogen deficiency. Finally we are exploiting natural Arabidopsis variation to identify and study plant adaptation strategies to limiting nitrogen providing.

The «Senescence, Autophagy, Nutrient recycling and nitrogen use efficiency» team studies mechanisms and genetic controls of recycling of nitrogen nutriments mobilisation during plant development and in response to environmental factors. The team is particularly interested in the role of the enzymes: glutamine synthase and asparagine synthase, in the role of autophagy in organic sources of nitrogen in recycling of protein nitrogen and in nutritional regulation by the TOR (Target Of Rapamycin).kinase signalling pathway.

The «Variation and Abiotic Stress Tolerance» team is using genomics and genetics strategies (including quantitative genetics) to understand the functioning of the networks of genes involved in controlling complex traits variation like responses to abiotic stress (drought, cold, ...). Natural variation segregating among Arabidopsis wild populations is particularly exploited to identify new mechanisms and new players in these pathways.

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Publications significatives :

Bikard D, Patel D, Le Metté C, Giorgi V, Camilleri C, Bennett MJ, Loudet O (2009). Divergent evolution of duplicate genes leads to genetic incompatibilities within A. thaliana. Science, 323 : 623-626. (pubmed)

Castaings L, Camargo A, Pocholle D, Gaudon V, Texier Y, Boutet-Mercey S, Taconnat L, Renou JP, Daniel-Vedele F, Fernandez E, Meyer C, Krapp A. (2009) The nodule inception-like protein 7 modulates nitrate sensing and metabolism in Arabidopsis. Plant J, 57 : 426-435. (pubmed)

Potel F, Valadier MH, Ferrario-Mery S, Grandjean O, Morin H, Gaufichon L, Boutet-Mercey S, Lothier J, Rothstein SJ, Hirose N, and Suzuki A (2009). Assimilation of excess ammonium into amino acids and nitrogen translocation in Arabidopsis thaliana-roles of glutamate synthases and carbamoylphosphate synthetase in leaves. Febs J, 276 : 4061-4076. (pubmed)

Bouchabke O, Quashie M-L, Seoane-Redondo J, Fortabat M-N, Gery C, Yu A, Linderme D, Trouverie J, Granier F, Téoulé E, Durand-Tardif M (2008). Eskimo1 is a key gene involved in water economy as well as cold acclimation and salt tolerance. BMC Plant Biol, 8 : 125. (pubmed)

Diaz C, Lemaître T, Christ A, Azzopardi M, Kato Y, Sato F, Morot-Gaudry JF, Le Dily F, Masclaux-Daubresse C (2008). Nitrogen recycling and remobilisation are differentially controlled by leaf senescence and development stage in Arabidopsis thaliana under low nitrogen nutrition. Plant Physiol, 147 : 1437-1449. (pubmed)

Ferrario-Méry S, Meyer C, Hodges M. (2008). Chloroplast nitrite uptake is enhanced in Arabidopsis PII mutants. FEBS Lett, 582 :1061-1066. (pubmed)

Le Hir R, Béneteau J, Bellini C, Vilaine F, Dinant S (2008). Transcriptomics data: keys for investigating phloem functions. Trends Plant Sci, 13 : 273-280. (pubmed)

Loudet O, Michael TP, Burger BT, Le Metté C, Mockler TC, Weigel D, Chory J (2008). A zinc knuckle protein that negatively controls morning-specific growth in A. thaliana. PNAS, 105 : 17193-17198. (pubmed)

McKhann HI, Gery C, Bérard A, Lévêque S, Zuther E, Hincha DK, De Mita S, Brunel D, Téoulé E (2008). Natural variation in CBF gene sequence, gene expression and freezing tolerance in the Versailles core collection of Arabidopsis thaliana. BMC Plant Biol, 8 : 105. (pubmed)

Chopin F, Orsel M, Dorbe MF, Chardon F, Truong HN, Miller T, Krapp A, Daniel-Vedele F. (2007). The arabidopsis ATNRT2.7 nitrate transporter gene controls nitrate content in seeds. Plant Cell, 19 : 1590-1602. (pubmed)

Deprost D, Yao L, Sormani R, Moreau M, Leterreux G, Nicolaï M, Bedu M, Robaglia C, Meyer C (2007). The Arabidopsis TOR kinase links plant growth, yield, stress resistance and mRNA translation. EMBO, Rep 8, 864-870. (pubmed)

Loudet O, Colombani V, Camilleri C, Calenge F, Gaudon V, Kopriva A, North K A, Daniel-Vedele F. (2007). Natural variation for sulfate content in Arabidopsis is highly controlled by adenosine 5’-phosphosulfate reductase. Nature Genet, 39 : 896-900. (pubmed)

Divol F, Vilaine F, Thibivilliers S, Amselem J, Palauqui J-C, Kusiak C, Dinant S (2005). Systemic response to aphid infestation by Myzus persicae in the phloem of Apium graveolens. Plant Mol Biol, 57 : 517-540. (pubmed)

Dinant S, Clark AM, Zhu Y. Vilaine F, Palauqui JC, Kusiak C, Thompson GA (2003). Diversity of the superfamily of Phloem lectins (Phloem protein 2) in angiosperms. Plant Physiol 131:114-128. (pubmed)

Vilaine F, Palauqui J-C, Amselem J, Kusiak C, Lemoine R, Dinant S (2003). Toward phloem deciphering: a transcriptome analysis of the phloem of Apium graveolens. Plant J, 36:67-81. (pubmed)

 

 

 

 

 

 
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