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Actualités
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Evènements
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L'Institut Jean-Pierre Bourgin au Salon International de l'Agriculture

"Biodiversité de l’arabette : jouer avec des plantes sauvages en les observant !"

24 février - 4 mars 2018

Cette annnée le stand de l'INRA abordait le thème de la biodiversité sous la forme d'ateliers scientifiques. Le domaine végétale était très largement représenté et en particulier avec l'atelier de l'IJPB consacré à la plante modèle la plus étudiée dans nos laboratoires : l'arabette des dames (Arabidopsis thaliana) qui appartient à la famille du colza. Une trentaine de membres de l'IJPB se sont relayés sur le stand de l'INRA pour animer avec enthousiasme les 9 jours de l'atelier présentant les recherches de l'IJPB en relation avec la biodiversité naturelle. Le public issu de tous horizons (familles, agriculteurs, étudiants...) a fait preuve d'une grande curiosité et observé, le plus souvent pour la première fois, cette petite plante modèle. Elle est la "souris verte" des laboratoires travaillant sur les plantes ! De façon ludique, le public est allé à la découverte des arabettes venant du monde entier. Ressemblances ? Différences ? Pays d’origine ? Comment sont-elles cultivées et caractérisées grâce à un robot : le Phenoscospe (vidéo) ? Petits et grands ont joué avec un florilège de nos collections et distingué les différences visibles chez des plantes sauvages d'arabidopsis issues de milieux très différents : un franc succès !

A retenir :
- Une collection de plus de 1500 plantes sauvages issues du monde entier
- 4 robots : plus de 700 plantes cultivées sur chacun, en action

Pour en savoir plus :
Webpheno :Phenoscope platform
L'Inra au SIA 2018 : Cultivons la diversité !

mars 2018


Symposium IJPB 2018

19-20 mars 2018, INRA, Versailles, France

L’Institut Jean-Pierre Bourgin (IJPB) couvre un champ d'activité qui s'étend de travaux fondamentaux sur le développement, la génétique et la physiologie des plantes jusqu'à la recherche finalisée pour l’utilisation alimentaire et non-alimentaire des produits végétaux, dans le cadre d’une agriculture durable. contacts

Les 19 et 20 Mars 2018, se tiendra le premier symposium de l'IJPB à l'amphithéatre de l'INRA de Versailles, couvrant une partie des champs de recherche de l'unité, accompagné de séminaires de 6 invités prestigieux :
Thomas Greb (Heidelberg University, Germany)
Claudia Köhler (Swedish University of Agricultural Sciences, Uppsala, Sweden)
Pyung Ok Lim (DGIST, South-Korea)
Gwyneth Ingram (ENS Lyon, France)
Nathalie Verbruggen (Bruxelles University, Belgium)
Jonathan Jones (Sainsbury Laboratory, Norwich, United Kingdom)


Anne Krapp et Olivier Loudet


Programme et affiche

Comité scientifique : Nicolas Bouché, Jasmine Burguet, Sylvie Dinant, Jean-Denis Faure, Martine Gonneau, Herman Höfte, Anne Krapp, Patrick Laufs, Loïc Lepiniec, Olivier Loudet, Céline Masclaux-Daubresse, Raphaël Mercier, Christian Meyer, Helen North et Jean-Christophe Palauqui

Comité local d’organisation : Corine Enard (Institut Jean-Pierre Bourgin (IJPB), Versailles), Maria-Jesus Lacruz (IJPB, Versailles), Philippe Poré (INRA, Versailles) et Stéphane Raude (IJPB, Versailles)

Contact et plus d'info : site Symposium IJPB 2018



21 novembre 2017


Séminaires
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Lundi 29 janvier 2018
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14h00

Séminaire invité
Pr. Oren OSTERSETZER-BIRAN
(Department of Plant and Environmental Sciences, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Israël)

Plant mitochondria group II introns splicing: A window into the evolution of the nuclear spliceosomal machineries

Mitochondria serve as principal sites for cellular energy metabolism and play pivotal roles in the biosynthesis of many essential metabolites for the (plant) cell. As dependences of a free-living organism, mitochondria contain their own genome, the mtDNA. Plant mitochondria are remarkable with respect to the presence of numerous group II introns. The removal of the introns from the coding sequences is essential for respiratory functions.While the splicing of group II introns in vivo is facilitated by maturase factors, canonical group II introns are catalytic RNAs that are able to excise themselves from their pre-RNA hosts in vitro, in the absence of the protein cofactors, using a mechanism identical to that utilized by the spliceosome. Structural analyses and phylogenetic data may indicate that the spliceosomal RNAs have evolved from group II intron-related ancestors. Yet, it remains unclear how could such general players in spliceosomal splicing evolve from the monospecific bacterial systems (i.e. a group II intron RNAs and their highly specific intron-encoded maturase factors). Analysis of the organellar splicing machinery in plants may provide us with important clues into the evolution of the nuclear splicing machineries. The ability of the mitochondrial maturases in plants to act on different intron targets further support the notion that the early organellar self-splicing and mobile group II RNAs spread in the eukaryotic genomes and later ‘degenerated’ into the universal splicing system, known as the spliceosome. The similarities between maturases and the core spliceosomal factor, Prp8, may support this intriguing hypothesis.

Oren Ostersetzer-Biran webpage

Invité par : Hakim Mireau 

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Jeudi 22 mars 2018
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11h00
Grande salle Bât. 7
Séminaire visiteur
Dr. Sichul LEE
Center of Plant Aging Research, Institute of basic science & Daegu Gyeongbuk Institute of Science and Technology,
Corée du Sud

OsASN1 overexpression in rice increases grain protein and yield
grown under nitrogen limitation

Invité par : céline Masclaux-Daubresse

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Vendredi 23 mars 2018
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11h00
Bibliothèque physio-phyto Bât. 2
Séminaire visiteur
Pr. Kris VISSENBERG
Université d'Anvers, Belgique

Control of root hair elongation
by auxin and the ERULUS kinase in Arabidopsis thaliana

Invité par : Herman Höfte
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Lundi 14 mai 2018
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14h00

Séminaire invité
Pr. Henrik JÖNSSON
The Sainsbury Laboratory, Cambridge, GB

How many cells can you fit in a stem cell niche?

Plant shoots harbor stem cells throughout the life of the plant maintained via a gene regulatory feedback network. Perturbations to these regulatory genes lead to changes in the size and shape of the stem cell niche. Similar effects can be achieved by perturbing the cell walls and heterogeneous and anisotropic mechanical wall properties need to be regulated to generate correct form. We use a Computational Morphodynamics approach, combining live imaging and models of cell wall mechanics and gene networks, to understand how growth and differentiation is coordinated. In this talk I will discuss how mechanical patterning can overlap with gene expression patterns, and how cell size and tissue size can influence the maintenance of the stem cell niche.

Hendrik Jönsson webpage
Invité par : Jasmine Burguet & Philippe Andrey

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Lundi 28 mai 2018
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11h00

Grande salle Bât. 7
Séminaire
Dr. Frank VAN BREUSEGEM
UGent Department of Plant Biotechnology and Bioinformatics, VIB Centre of Plant Systems Biology, Belgique

Oxidative Stress Signaling in Plants. Towards the proteome and beyond

In plants, alterations of reactive oxygen species (ROS) levels cause fluctuations of the redox balance and hence can affect many aspects of cellular physiology. ROS levels are controlled by a diversified set of antioxidant systems that allow the maintenance of redox status. Perturbations of these ROS levels can lead to transient or permanent changes in the redox status. This feature is exploited by plants in different stress signaling mechanisms. Understanding how plants sense ROS and transduce these stimuli into downstream biological responses is still a major challenge. Previous transcriptome-centered analyses, provided us first insights in the regulatory networks that govern the oxidative stress response. Now, tailoring various proteomics technologies allowed us to assess oxidative stress dependent changes at the posttranslational level. These efforts will allow a better understanding of how cells interpret the oxidative signals that arise from developmental cues and stress conditions.

Frank Van Breusegem Lab

Invité par : Pierre Hilson

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Mardi 5 juin 018
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10h00 -12h30

Grande salle Bât. 7
Séminaires visiteurs
10h00

Margot LECLERE
Agronomie, INRA, Thiverval-Grignon

On-farm assessment of innovative camelina management strategies to supply a biorefinery in Northern France

11h00
Dr. Christina EYNCK
Saskatoon Research and Development Centre, Canada

Camelina breeding and research at Agriculture and Agri-Food Canada - Saskatoon

Invitées par : Jean-Denis Faure

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Lundi 11 juin 2018
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14h00

Séminaire Focus
Dr. Herman HÖFTE
Equipe IJPB "Paroi primaire"

Cell wall sensing in plant growth and development

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Vendredi 15 juin 2018
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11h00
bibliothèque physio-phyto Bât. 2

Séminaire visiteur
Dr. Alexandre MARTINIERE
Biochimie & Physiologie Moléculaire des Plantes
SupAgro, Montpellier

Early signalling events during osmotic stress in Arabidopsis

Invité par : Herman Höfte
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Lundi 18 juin 2018
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14h00

Séminaire invité IJPB/SPS
Dr. Emmanuelle BAYER
Laboratoire de Biogenèse Membranaire
CNRS-Université de Bordeaux

Plasmodesmata: cellular machine for inter and intra cellular communication

Intercellular communication is critical for multicellularity. It coordinates the activities within individual cells to support the function of an organism as a whole. Plants have developed remarkable cellular machines -the Plasmodesmata (PD) pores- which interconnect every single cell within the plant body, establishing direct membrane and cytoplasmic continuity, a situation unique to plants. PD are indispensable for plant life. They control the flux of molecules between cells and are decisive for development, environmental adaptation and defence signalling. However, how PD integrate signalling to coordinate responses at a multicellular level remains unclear.
A striking feature of PD organisation, setting them apart from animal cell junctions, is a strand of endoplasmic reticulum (ER) running through the pore, tethered extremely tight (~10nm) to the plasma membrane (PM) by unidentified “spokes”. To date, the function of ER-PM contacts at PD remains a complete enigma. We don’t know how and why the two organelles come together at PD cellular junctions.
Using a combination of proteomic approaches, biophysical/modelling methods and ultra-high resolution 3D imaging into molecular cell biology of plant cell-to-cell communication, our lab is trying to address the mechanism and function of ER-PM contacts at PD.

Page Equipe Emmanuelle Bayer

Invitée par : Grégory Mouille

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Mardi 19 Juin 2018
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11h30
grande salle Bât. 7

Séminaire visiteur
Dr. Chie KODERA
Signalisation Cellulaire (SiCE), Laboratoire Reproduction et Développement des Plantes (RDP)
ENS Lyon

From Yeast to Plant, and then…. -signaling and dynamics of the cell-

Invitée par : David Bouchez

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Lundi 25 juin 2018
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14h00

Séminaire invité IJPB/SPS
Dr. Korbinian SCHNEEBERGER
Genome Plasticity and Computational Genetics
Max Planck Institut, Cologne, Allemagne

Phylogenetic association mapping and a simple, sequencing-based method to assess meiotic recombination landscapes

During the past years, great progress has been made in the development of association methods for GWAS or QTL mapping. However, methods to map the variation that can be found between species are still sparse. We have developed a genomics-based method for between-species (or ‘phylogenetic’) association mapping (PAM), which can find signals even in highly re-arranged genomes of different species. In my presentation, I will show how we used PAM in a panel of 47 closely-related plant species to map the genetic underpinnings of differences in the mutational profiles that we found in these species.
In the second part of my talk I will present a new method that reveals meiotic recombination landscapes in a single, sequencing experiment. Using sequencing data from ultra-long molecules extracted from hybrid pollen we can precisely estimate the location of hundreds of crossing-over events. We assess our method using a pool of recombinant plants which also have been whole-genome sequenced individually. Ultimately, we plan to use this method to phenotype recombination landscapes across our 47 plant species and use it as a trait for PAM.

Korbinian Schneeberger groupe webpage

Invité par : et

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Lieu des séminaires sauf indication contraire
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Amphithéâtre de Versailles, Bât. 10
INRA Centre de Versailles-Grignon
Route de St Cyr (RD10)
78026 Versailles Cedex

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