| Loss of stability: a new look at the physics of cell wall behavior during plant cell growth. | |
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MedLine Citation:
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PMID: 17905864 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In this article we investigate aspects of turgor-driven plant cell growth within the framework of a model derived from the Eulerian concept of instability. In particular we explore the relationship between cell geometry and cell turgor pressure by extending loss of stability theory to encompass cylindrical cells. Beginning with an analysis of the three-dimensional stress and strain of a cylindrical pressure vessel, we demonstrate that loss of stability is the inevitable result of gradually increasing internal pressure in a cylindrical cell. The turgor pressure predictions based on this model differ from the more traditional viscoelastic or creep-based models in that they incorporate both cell geometry and wall mechanical properties in a single term. To confirm our predicted working turgor pressures, we obtained wall dimensions, elastic moduli, and turgor pressures of sequential internodal cells of intact Chara corallina plants by direct measurement. The results show that turgor pressure predictions based on loss of stability theory fall within the expected physiological range of turgor pressures for this plant. We also studied the effect of varying wall Poisson's ratio nu on extension growth in living cells, showing that while increasing elastic modulus has an understandably negative effect on wall expansion, increasing Poisson's ratio would be expected to accelerate wall expansion. |
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Authors:
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Chunfang Wei; Philip M Lintilhac |
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Publication Detail:
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Type: Journal Article Date: 2007-09-28 |
Journal Detail:
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Title: Plant physiology Volume: 145 ISSN: 0032-0889 ISO Abbreviation: Plant Physiol. Publication Date: 2007 Nov |
Date Detail:
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Created Date: 2007-11-06 Completed Date: 2008-01-14 Revised Date: 2010-09-16 |
Medline Journal Info:
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Nlm Unique ID: 0401224 Medline TA: Plant Physiol Country: United States |
Other Details:
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Languages: eng Pagination: 763-72 Citation Subset: IM |
Affiliation:
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Department of Plant Biology, University of Vermont, Burlington, Vermont 05405, USA. chunfang.wei@uvm.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Biophysical Phenomena Biophysics Cell Enlargement* Cell Wall / drug effects, physiology* Chara / cytology*, drug effects Mannitol / pharmacology Pressure Water |
| Chemical | |
Reg. No./Substance:
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69-65-8/Mannitol; 7732-18-5/Water |
| Comments/Corrections | |
Comment In:
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Plant Physiol. 2008 Jul;147(3):935-6; author reply 936-8
[PMID:
18612070
]
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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