28 30 November 2022 Ended
Poitiers
From genes to plant architecture: the shoot apical meristem in all its states
INRAE and the INRIA organized on 28-30 November 2023 in Poitiers (France) the first European conference about integrating the functioning of shoot apical meristems in plant’s architecture. Lateral and terminal meristems were considered so that questions related to apex maintenance, leaf production, stem elongation, ramification, in relation to the environment were addressed, from the molecular to the whole plant levels. 18 presentations including 12 keynotes contributed to the multidisciplinary event for a comprehensive picture of the state of the art and the perspectives in interdisciplinary research. Video captures of conferences as well as presentation files are available below.
Program
Conference opening
Xavier Bernard Foundation
Guy Viollet
INRAE Nouvelle-Aquitaine-Poitiers Centre
Philippe Barre
Introduction
Morphogenesis at the shoot meristem: a challenging problem
Jan Traas
diaporama
Session 1: Functionning of the SAM
Chair: Herman Höfte, Jean-Louis Durand
Keynote:
On the initiation and maintenance of shoot meristems
Henrik Jönsson
Short communications:
- Tight control of division plane orientation is necessary to optimize the growth capacity of tissues and organs in Arabidopsis thaliana
Magalie Uyttewaal - De novo stem cell establishment in meristems requires repression of organ boundary cell fate
Patrick Laufs - 2_laufs_ifm2a2.pdf pdf - 2.39 MB
- How mechanical signals contribute to plant resilience after drastic pruning: the case of pollard trees
Marianne Lang - Analysis of natural variation in meristematic conversion
Jean-Christophe Palauqui - Hydraulic stress at the meristem-organ boundaries
Juan Alonso Serra - Computational analysis of cell division patterns in the shoot apical meristem
Philippe Andrey
Keynote:
Changing SAM geometry and generation of phyllotactic patterns
Dorota Kwiatkowska
5 Kwiatkowska IFM2A2.pdf
pdf - 5.98 MB
Keynote:
From phyllotaxis to Homogalacturonan and back: exploring the origins of plant growth
Alexis Peaucelle
6 Peaucelle IFM2A2.pdf
pdf - 5.34 MB
Keynote:
How meristem cells measure themselves and why it matters
Robert Sablowski
Keynote:
The distribution of sugars and amino acids between source and sink organs: more than just a transporters’game
Sylvie Dinant
7 Dinant IFM2A2.pdf
pdf - 3.37 MB
Short communications:
- Model-based reconstruction of whole organ growth dynamics reveals invariant patterns in leaf morphogenesis
Jasmine Burguet - Statistical spatio-temporal atlasing of gene expression patterns during organ growth
Nicolas Arnaud
- Bract inhibition at floral transition in Arabidopsis thaliana
Sana Dieudonné
Session 2: Determination and regulation of the SAM and its faith in the plant
Chair: Frédéric Boudon and Christophe Godin
Keynote:
Off with their head: a tale of decapitation and auxin
Yoan Coudert
Representation and functions of shoot apical meristems in FSPMs
Romain Barillot
10 Barillot IFM2A2.pdf
pdf - 3.51 MB
Keynote:
What did we learn on meristem fates by modelling fruit tree development?
Evelyne Costes
11 Costes IFM2A2.pdf
pdf - 3.81 MB
Short communications:
- Detecting dormancy dynamics in woody plants by characterizing hydraulic connectivity between stem and bud
Guillaume Charrier - Temperature heterogeneity at crown scale possible impact on tree architecture after late spring frost
Nicolas Dusart - Axillary meristem is central to the trade-off between flowering and runnering in strawberry
Amélia Gaston
Keynote:
Control of lateral meristems: how is sugar availability involved in the environmental control of axillary bud outgrowth?
Jessica Bertheloot
14 Bertheloot IFM2A2.pdf
pdf - 2.00 MB
Short communications:
- Sugar signaling modulates Shoot meristemless expression and meristem function in Arabidopsis
Filipa Lara Lopes
- A hydraulically based model framework for the grass leaf meristem
Tom de Swaef
Session 3: Toward Functionnal Structural Plant Models integrating the SAM functions
Chair: Jessica Bertheloot, Romain Barillot
Keynote:
Cauliflowers and the genetic origin of fractals in plants
Christophe Godin
Short communications:
- The SAM and the leaf series in grasses: a new model
Jean-Louis Durand - Linking genes to plant global morphogenesis: the role of tropisms just beyond the SAM
Bruno Moulia
Keynote:
Towards the integration of cellular scales in individual plant models
Anne Goelzer
18 Goelzer IFM2A2.pdf
pdf - 5.42 MB
General discussion
What is the next step to integrating SAM biology to the plant level?
Animation Robert Faivre