A5045899506- Plant nutrient uptake and metabolism
- Plant Micronutrient Interactions and Effects
- Plant Molecular Biology Research
- Photosynthetic Processes and Mechanisms
- Legume Nitrogen Fixing Symbiosis
- Plant Stress Responses and Tolerance
- Plant responses to elevated CO2
- Plant-Microbe Interactions and Immunity
- Soil Carbon and Nitrogen Dynamics
- Plant tissue culture and regeneration
- Polysaccharides and Plant Cell Walls
- Pesticide and Herbicide Environmental Studies
- Plant Physiology and Cultivation Studies
- Plant and fungal interactions
- Soil and Water Nutrient Dynamics
- Phytase and its Applications
- Single-cell and spatial transcriptomics
- Potato Plant Research
- Plant responses to water stress
- Plant Reproductive Biology
- Weed Control and Herbicide Applications
- Genetic Syndromes and Imprinting
- Bryophyte Studies and Records
- Rice Cultivation and Yield Improvement
- Plant Pathogenic Bacteria Studies
CEA Cadarache
1992-2021
Institut de Biosciences et Biotechnologies
2011-2021
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
1997-2021
Centre National de la Recherche Scientifique
2004-2021
Laboratoire de Biologie du Développement
2003-2021
Aix-Marseille Université
2010-2018
Centre National pour la Recherche Scientifique et Technique (CNRST)
2016
Purdue University West Lafayette
2005
Laboratoire Physiologie Cellulaire & Végétale
2005
Université de Perpignan
1983
Phosphorus, one of the essential elements for plants, is often a limiting nutrient because its low availability and mobility in soils. Significant changes plant morphology biochemical processes are associated with phosphate (Pi) deficiency. However, molecular bases these responses to Pi deficiency not thoroughly elucidated. Therefore, comprehensive survey global gene expression response deprivation was done by using Arabidopsis thaliana whole genome Affymetrix chip (ATH1) quantify...
Phosphate is a crucial and often limiting nutrient for plant growth. To obtain inorganic phosphate (Pi), which very insoluble, heterogeneously distributed in the soil, plants have evolved complex network of morphological biochemical processes. These processes are controlled by regulatory system triggered Pi concentration, not only present medium (external Pi), but also inside cells (internal Pi). A 'split-root' assay was performed to mimic heterogeneous environment, after transcriptomic...
Abstract Environmental cues profoundly modulate cell proliferation and elongation to inform direct plant growth development. External phosphate (Pi) limitation inhibits primary root in many species. However, the underlying Pi sensory mechanisms are unknown. Here we genetically uncouple two sensing pathways apex of Arabidopsis thaliana . First, rapid inhibition transition zone is controlled by transcription factor STOP1, its target, ALMT1 , encoding a malate channel, ferroxidase LPR1, which...
Abstract Arabidopsis (Arabidopsis thaliana) absorbs inorganic phosphate (Pi) from the soil through an active transport process mediated by nine members of PHOSPHATE TRANSPORTER1 (PHT1) family. These proteins share a high level similarity (greater than 61%), with overlapping expression patterns. The resulting genetic and functional redundancy prevents analysis their specific roles. To overcome this difficulty, our approach combined several mutations gene silencing to inactivate multiple PHT1...
The root cap has a fundamental role in sensing environmental cues as well regulating growth via altered meristem activity. Despite this well-established the control of developmental processes roots, cap's function nutrition remains obscure. Here, we uncover its phosphate by targeted cellular inactivation or transport complementation Arabidopsis, using transactivation strategy with an innovative high-resolution real-time (33)P imaging technique. Remarkably, diminutive size cells at...
Summary RNA transcript levels of Arabidopsis plants, infected by the rhizobacterium Pseudomonas thivervalensis (strain MLG45), and axenic control plants were compared using cDNA microarrays representing approximately 14 300 genes. The analysis revealed an increase defence‐related transcripts in shoots bacterized relative to (axenic) plants. These modifications confirmed physiological experiments. Plants with P. more resistant subsequent infections virulent pathogen syringae pv. tomato...
Soil availability of inorganic ortho-phosphate (PO43−, Pi) is a key determinant plant growth and fitness.1Bieleski R.L. Phosphate pools, phosphate transport, availability.Annu. Rev. Plant Physiol. 1973; 24: 225-252Crossref Google Scholar Plants regulate the capacity their roots to take up by adapting abundance H+-coupled transporters PHOSPHATE TRANSPORTER 1 (PHT1) family2Nussaume L. Kanno S. Javot H. Marin E. Pochon N. Ayadi A. Nakanishi T.M. Thibaud M.C. import in plants: focus on PHT1...
Background Mutations in the FRY1/SAL1 Arabidopsis locus are highly pleiotropic, affecting drought tolerance, leaf shape and root growth. FRY1 encodes a nucleotide phosphatase that vitro has inositol polyphosphate 1-phosphatase 3′,(2′),5′-bisphosphate activities. It is not clear which activity mediates each of diverse biological functions planta. Principal Findings A fry1 mutant was identified genetic screen for mutants deregulated expression Pi High affinity Transporter 1;4 (PHT1;4)....
Summary A novel Arabidopsis DHDPS gene named DHDPS2 was found through identification of a mutant by promoter trapping. The mutation promotes reduction growth resulting from combination defect in lysine biosynthesis and accumulation toxic level threonine or derived products. also modifies the amino acid composition issuing pyruvate aspartate pathways, affecting mainly root compartment. These data are accordance with expression apex as visualized GUS reporter gene. This suggests that large...
Phosphate starvation-mediated induction of the HAD-type phosphatases PPsPase1 (AT1G73010) and PECP1 (AT1G17710) has been reported in Arabidopsis (Arabidopsis thaliana). However, little is known about their vivo function or impact on plant responses to nutrient deficiency. The preferences for different substrates have studied vitro but require confirmation planta. Here, we examined both enzymes using a reverse genetics approach. We demonstrated that affect phosphocholine phosphoethanolamine...
Abstract Inorganic phosphate (Pi) is present in most soils at suboptimal concentrations, strongly limiting plant development. Plants have the ability to sense and adapt surrounding ionic environment, several genes involved response Pi starvation been identified. However, a global understanding of regulatory mechanisms this process still elusive. Here, we initiated chemical genetics approach isolated compounds that inhibit Arabidopsis (Arabidopsis thaliana). Molecules were screened for their...
Abstract The contribution of crop residue phosphorus to ryegrass nutrition was analyzed by isotopic dilution methods, i.e. direct labelling and phosphate ions in the soil solution. Three types residues were investigated: aerial parts roots wheat straw. Our experiments showed a high dependence uptake on characteristics. Compared with absorption derived from diammonium phosphate, use root similar higher for part straw residues. We suggest it be due protecting effect vegetal structure, being...