Another Brick in the (Cell) Wall - Archive ouverte HAL
Communication Dans Un Congrès Année : 2013

Another Brick in the (Cell) Wall

Résumé

Expansive growth of plant cell is conditioned by the cell wall ability to extend irreversibly. This process is possible if (i) a tensile stress is developed in the cell wall due to coupling effect between turgor pressure and the modulation of its mechanical properties by enzymatic and physicochemical reactions and if (ii) new cell wall “bricks” are synthesized and assembled to the existing wall. In other words, expansive growth is the result of coupling effects between mechanical, thermal and chemical energy. To better understand the process of growth, models must describe the interplay between physical or mechanical variable with biological processes. In this presentation a general unified and theoretical framework is proposed, based on irreversible thermodynamics [1,2], which is adapted to model growth in function of energy forms and their coupling. This communication presents the theoretical paradigm and then applied it to model growth of the internodal cell of C. corallina modulated by changes in pressure and temperature. The results of the model describe faithfully the growth of the cell in term of both length increment and cell pectate biosynthesis and addition to the expanding wall. These results [3] are in full agreement with the experimental evidences [4]. The model proposed is able to take into account the role of turgor pressure, which is not only the trigger of growth but is also implied in cell wall construction regulation loop [5]. The creation of such biosynthesis dependent growth model can be viewed as the first step towards a more integrative biophysical modelling of growth.
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Dates et versions

hal-01333154 , version 1 (16-06-2016)

Identifiants

  • HAL Id : hal-01333154 , version 1
  • PRODINRA : 357018

Citer

Adelin Barbacci, Marc Lahaye, Pauline Videcoq, Vincent Magnenet. Another Brick in the (Cell) Wall. 13. Cell Wall Meeting, Institut National de Recherche Agronomique (INRA). UR Biopolymères, Interactions Assemblages (1268)., Jul 2013, Nantes, France. ⟨hal-01333154⟩
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