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J Exp Bot. 2016 Jan;67(2):449-61. doi: 10.1093/jxb/erv535. Epub 2015 Dec 20.

Relating the mechanics of the primary plant cell wall to morphogenesis.

Author information

1
Institut de recherche en biologie végétale, Département de sciences biologiques, Université de Montréal, Montreal, Quebec H1X 2B2, Canada.
2
Institut de recherche en biologie végétale, Département de sciences biologiques, Université de Montréal, Montreal, Quebec H1X 2B2, Canada anja.geitmann@umontreal.ca.

Abstract

Regulation of the mechanical properties of the cell wall is a key parameter used by plants to control the growth behavior of individual cells and tissues. Modulation of the mechanical properties occurs through the control of the biochemical composition and the degree and nature of interlinking between cell wall polysaccharides. Preferentially oriented cellulose microfibrils restrict cellular expansive growth, but recent evidence suggests that this may not be the trigger for anisotropic growth. Instead, non-uniform softening through the modulation of pectin chemistry may be an initial step that precedes stress-induced stiffening of the wall through cellulose. Here we briefly review the major cell wall polysaccharides and their implication for plant cell wall mechanics that need to be considered in order to study the growth behavior of the primary plant cell wall.

KEYWORDS:

Cellulose; mechanical feedback; morphogenesis; organogenesis; pectins; plant cell mechanics; plant cell wall; poroelasticity; wall porosity.

PMID:
26689854
DOI:
10.1093/jxb/erv535
[Indexed for MEDLINE]

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