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Kreszies, Tino; Eggels, Stella; Kreszies, Victoria; Osthoff, Alina; Shellakkutti, Nandhini; Baldauf, Jutta A.; Zeisler‐Diehl, Viktoria V.; Hochholdinger, Frank; Ranathunge, Kosala; Schreiber, Lukas

doi:10.1111/pce.13719

Cited by 1 publication

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“…Bespoke experiments would be needed to test this idea. Finally, the values of water conductivity (~7.10 -8 m.s -1 .MPa -1 ) are in the same range as the conductivity measured in roots of flowering plants [44][45][46].…”

Section: Discussionsupporting

confidence: 61%

“…Water conductivity is slightly increased by this treatment. Even though osmotic stress generally decreases root hydraulic conductivity [44], is has been shown to increase it in some accessions [46]. Taken together the increase of conductivity and decrease of elastic moduli suggest that the reaction of the plant to osmotic stress is to adjust its hydromechanical properties to increase growth rate (Fig.…”

Section: Discussionmentioning

confidence: 91%

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Assessing the hydromechanical control of plant growth

Laplaud,

Muller,

Demidova

et al. 2023

Preprint

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Multicellular organisms grow and acquire their shapes by controlling the differential expansion and deformations of their cells. Recent research has addressed the role of the mechanical properties of cells and tissues in these processes. In the case of plants, it is generally believed that growth rate is a function of the mechanical stress exerted on the cell wall, the thin polymeric layer surrounding cells, involving an effective viscosity. Nevertheless, recent work has pointed to the relevance of cell wall elasticity in setting growth rate. To extensively assess this relevance, we chose to work on the genetically identical small plants produced in Marchantia polymorpha and we developed a microfluidic device to study the early growth and elastic properties of individual plants in a controlled environment with a high-throughput. We characterized the effect of osmotic treatment and of abscisic acid on plant growth and mechanics. Overall, we show that the instantaneous growth rate of individuals is significantly correlated to their bulk elastic modulus, with a correlation coefficient that changes with treatments. Our results are consistent with a framework in which growth rate is determined by elasticity of the wall and a chemical rate associated with remodeling of the cell wall or with changes in its composition. Accordingly, we propose that a tight coupling between mechanics and chemistry of the cell wall is key to setting growth patterns during morphogenesis.

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Section: Discussionsupporting

confidence: 61%

Section: Discussionmentioning

confidence: 91%