• Aucun résultat trouvé

The proprioceptive control of posture in land plants

N/A
N/A
Info
Télécharger
Protected

Academic year: 2021

Partager "The proprioceptive control of posture in land plants"

Copied!
3
0
0

Chargement.... (Voir le texte intégral maintenant)

Texte intégral

(1)

HAL Id: hal-01189759

https://hal.archives-ouvertes.fr/hal-01189759

Submitted on 3 Jun 2020

HAL is a multi-disciplinary open access archive for the deposit and dissemination of sci-entific research documents, whether they are pub-lished or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers.

L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

The proprioceptive control of posture in land plants

Bruno Moulia

To cite this version:

Bruno Moulia. The proprioceptive control of posture in land plants. 5th International Conference on Mechanics of Biomaterials and Tissues, Dec 2013, Sitges, Spain. Academic Press - Elsevier, 2 p., 2013. �hal-01189759�

(2)

5th International Conference on Mechanics of Biomaterials and Tissues 2013.

Sitges Dec 2013 – Special session “wood and plant mechanics”

The proprioceptive control of posture in land plants

abstract MOBT2013_0244, oral programme :reference number : S1.3

Bruno Moulia,a,b *

aINRA (Institut National de la Recherche Agronomique), UMR0547 PIAF (Unité Mixte de Recherche Physique et Physiologie Intégratives de l’Arbre Fruitier et Forestier), F-63100 Clermont-Ferrand, France;

b Clermont Université, Université Blaise Pascal, UMR0547 PIAF (Unité Mixte de Recherche Physique et Physiologie Intégratives de l’Arbre Fruitier et Forestier), BP 10448, F-63000 Clermont-Ferrand, France

Land plants have to control their posture while growing in a mechanically challenging environment. In particular they may recover from non-lethal tilting or lodging though active and coordinated growth movements. Such mouvements are known as gravitropism. Shoot gravitropism is triggered when statocysts sense the local angle of the growing organ relative to the gravitational field. Lateral transport of the hormone auxin to the lower side is then enhanced, resulting in differential gene expression and cell elongation,or shrinkage in woody parts of the plants, causing the organ to bend. However, little was know about the dynamics, regulation, and diversity of the entire bending and straightening process.

Recently, using vital kinematic imaging of the gravitropic movement of different organs from 11 angiosperms sampling the phylogenic tree of land angiosperms, we found that gravitropic straightening shares common traits across species, organs types and sizes. Surprisingly, the minimal dynamic model accounting for these traits is not the widely cited gravisensing law but one that also takes into account the sensing of the local curvature, i.e. a proprioception. A minimal dynamical model of the movement of the plant during gravitropism and posture control, called the AC model has been designed, that can explain most of the diversity observed in experiments. Moreover the entire dynamics of the bending/straightening response is described by a single dimensionless “bending number” B that reflects the ratio between graviceptive and proprioceptive sensitivities, and defines both the final shape of the organ at equilibrium and the timing of curving and straightening. Proprioceptive sensing is thus as important as gravisensing in dynamical gravitropic control. The mechanobiological mechanisms underlying this proprioceptive control will be discussed in the light of the models developed for the sensing and growth control after controlled bending, and the general issue of motion control in plants (and its relation with motion actuation) will be discussed

R.BASTIEN, T. BOHR, B. MOULIA.† *, S.DOUADY.† , 2013 . A unifying model of shoot gravitropism reveals proprioception as a central feature of posture control in plant. PNAS 110 (2 ): 755–760 († co-PI last authors, * corresponding author )

J DUMAIS 2013 Beyond the sine law of plant gravitropism (commentary of the paper by Bastien et al 2013) PNAS 110 (2 ) 391–392

MOULIA B, C. DER LOUGHIAN*, R BASTIEN*, et al. 2011. Integrative mechanobiology of growth and architectural development in changing mechanical environments. In » P Wojtaszek (ed) « Mechanical Integration of Plant Cells and Plants Springer , Series: Signaling and Communication in Plants, Springer-Verlag GmbH Berlin Heidelberg (pub). Pp 269-302.

(3)

5th International Conference on Mechanics of Biomaterials and Tissues 2013

Sitges, Spain 8th – 12th December 2013

abstract (MOBT2013_0244)” The proprioceptive control of posture in land plants” is part of the oral programme for 5th International Conference on Mechanics of Biomaterials and Tissues 2013.

Your new reference number is S1.3.

The schedule of your Oral presentation is as follows: Day: Monday, 9th December 2013

Time: 09:20 –0 9:40 Room: Tramuntana 1 & 2

Duration: 20 minutes (including questions)

Prathibha Mehta

Conference Content Executive

5th International Conference on the Mechanics of Biomaterials and Tissues 2013

Références

Télécharger maintenant ( PDF - 3 Page - 198.16 KB )

Documents relatifs

Efficient Monitoring of Loose-Ordering Properties for SystemC/TLM

The contributions are (i) a new notion called loose-ordering, allowing to remove the sources of over-constraints due to the order of interactions between components in a TL model;

Alertness can be improved by an interaction between orienting attention and alerting attention in schizophrenia.

Nevertheless, our attempt to superimpose analyses of the effect of valid or invalid trials, or congruent or incongruent trials provided comparable orienting or conflict effects in

Proprioceptive loss and the perception, control and learning of arm movements in humans: evidence from sensory neuronopathy

PL and control participants then performed a “double- adaptation” task (Experiment 2) based on that reported by (Smith et al. 2006) with a 25-trial practice session, and then

Behavioural evidence for a visual and proprioceptive control of head roll in hoverflies (Episyrphus balteatus)

In addition to the idea that the head orientation may serve as a zero reference for controlling body roll movements (which are therefore based on ‘ head in body ’ inputs only),

Workshop on the Control of Systemic Risks in Global Networks (SysRisk2019 - as part of the 14th International Conference Wirtschaftsinformatik) (preface)

To address the Grand Challenge of controlling systemic risks in global networks, this workshop aims at both the collection and discussion of innovative approaches,

Towards an International Classification for Patient Safety: the conceptual framework

A drafting group, comprised of experts from the fields of patient safety, classification theory, health informatics, consumer/patient advocacy, law and medicine, identified and

Ces traumatismes que nous ignorons, Jonas DJESER

En fait, le problème est le même, c’est qu’ils n’ont pas su comprendre et s’approprier l’histoire de la France et de l’Europe, et n’ont donc pas compris ce traumatisme

Dynamic control for the task/posture coordination of humanoids : toward synthesis of complex activities

It is based on convex optimization methods, and the good properties of quadratic programming (QP) can efficiently perform the whole body control (in time, convergence, robustness)