Regulator or driving force? The role of turgor pressure in oscillatory plant cell growth.

Turgor generates the stress that leads to the expansion of plant cell walls during cellular growth. This has been formalized by the Lockhart equation, which can be derived from the physical laws of the deformation of viscoelastic materials. However, the experimental evidence for such a direct correl...

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Autores principales:	Jens H Kroeger, Rabah Zerzour, Anja Geitmann
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c5a05a544b4b42a89755fc31547bc137
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spelling	oai:doaj.org-article:c5a05a544b4b42a89755fc31547bc1372021-11-18T06:55:16ZRegulator or driving force? The role of turgor pressure in oscillatory plant cell growth.1932-620310.1371/journal.pone.0018549https://doaj.org/article/c5a05a544b4b42a89755fc31547bc1372011-04-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21541026/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Turgor generates the stress that leads to the expansion of plant cell walls during cellular growth. This has been formalized by the Lockhart equation, which can be derived from the physical laws of the deformation of viscoelastic materials. However, the experimental evidence for such a direct correlation between growth rate and turgor is inconclusive. This has led to challenges of the Lockhart model. We model the oscillatory growth of pollen tubes to investigate this relationship. We couple the Lockhart equation to the dynamical equations for the change in material properties. We find that the correct implementation of the Lockhart equation within a feedback loop leading to low amplitude oscillatory growth predicts that in this system changes in the global turgor do not influence the average growth rate in a linear manner, consistent with experimental observations. An analytic analysis of our model demonstrates in which regime the average growth rate becomes uncorrelated from the turgor pressure.Jens H KroegerRabah ZerzourAnja GeitmannPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 4, p e18549 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jens H Kroeger Rabah Zerzour Anja Geitmann Regulator or driving force? The role of turgor pressure in oscillatory plant cell growth.
description	Turgor generates the stress that leads to the expansion of plant cell walls during cellular growth. This has been formalized by the Lockhart equation, which can be derived from the physical laws of the deformation of viscoelastic materials. However, the experimental evidence for such a direct correlation between growth rate and turgor is inconclusive. This has led to challenges of the Lockhart model. We model the oscillatory growth of pollen tubes to investigate this relationship. We couple the Lockhart equation to the dynamical equations for the change in material properties. We find that the correct implementation of the Lockhart equation within a feedback loop leading to low amplitude oscillatory growth predicts that in this system changes in the global turgor do not influence the average growth rate in a linear manner, consistent with experimental observations. An analytic analysis of our model demonstrates in which regime the average growth rate becomes uncorrelated from the turgor pressure.
format	article
author	Jens H Kroeger Rabah Zerzour Anja Geitmann
author_facet	Jens H Kroeger Rabah Zerzour Anja Geitmann
author_sort	Jens H Kroeger
title	Regulator or driving force? The role of turgor pressure in oscillatory plant cell growth.
title_short	Regulator or driving force? The role of turgor pressure in oscillatory plant cell growth.
title_full	Regulator or driving force? The role of turgor pressure in oscillatory plant cell growth.
title_fullStr	Regulator or driving force? The role of turgor pressure in oscillatory plant cell growth.
title_full_unstemmed	Regulator or driving force? The role of turgor pressure in oscillatory plant cell growth.
title_sort	regulator or driving force? the role of turgor pressure in oscillatory plant cell growth.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/c5a05a544b4b42a89755fc31547bc137
work_keys_str_mv	AT jenshkroeger regulatorordrivingforcetheroleofturgorpressureinoscillatoryplantcellgrowth AT rabahzerzour regulatorordrivingforcetheroleofturgorpressureinoscillatoryplantcellgrowth AT anjageitmann regulatorordrivingforcetheroleofturgorpressureinoscillatoryplantcellgrowth
_version_	1718424192925302784

Regulator or driving force? The role of turgor pressure in oscillatory plant cell growth.

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