Tension required for pectate chemistry to control growth in Chara corallina

Journal of Experimental Botany
Timothy E Proseus, J S Boyer

Abstract

Recent work showed that polygalacturonate (pectate) chemistry controlled the growth rate of the large-celled alga Chara corallina when turgor pressure (P) was normal (about 0.5 MPa). The mechanism involved calcium withdrawal from the wall by newly supplied pectate acting as a chelator. But P itself can affect growth rate. Therefore, pectate chemistry was investigated at various P. A pressure probe varied P in isolated walls, varying the tension on the calcium pectate cross-links bearing the load of P. When soluble pectate was newly supplied, the wall grew irreversibly but the pectate was inactive below a P of 0.2 MPa, indicating that tension was required in the existing wall before new pectate acted. It was suggested that the tension distorted some of the wall pectate (the dominant pectin), weakening its calcium cross-links and causing the calcium to be preferentially lost to the new pectate, which was not distorted. The preferential loss provided a molecular mechanism for loosening the wall structure, resulting in faster growth. However, the resulting relaxation of the vacated wall pectate would cause calcium to be exchanged with load-bearing calcium pectate nearby, auto-propagating throughout the wall for long periods. There ...Continue Reading

Citations

Mar 24, 2012·Journal of Experimental Botany·Timothy E Proseus, John S Boyer
Sep 26, 2013·PloS One·Adelin BarbacciVincent Magnenet
Feb 22, 2011·Annual Review of Plant Biology·Vincent MirabetOlivier Hamant
Feb 21, 2016·Trends in Plant Science·Olivier Ali, Jan Traas
Jul 9, 2013·Current Opinion in Plant Biology·Olivier Hamant
May 5, 2012·Bio Systems·Robert Palin, Anja Geitmann
Apr 26, 2011·Trends in Plant Science·Laura Zonia, Teun Munnik
May 30, 2008·Plant, Cell & Environment·Timothy E Proseus, John S Boyer
Apr 5, 2013·The Plant Journal : for Cell and Molecular Biology·Benoît Landrein, Olivier Hamant
Aug 29, 2012·The New Phytologist·Florent PantinBertrand Muller
Apr 10, 2010·Journal of Integrative Plant Biology·Peter K Hepler, Lawrence J Winship
Oct 16, 2015·Interface Focus·Raymond E Goldstein, Jan-Willem van de Meent
Aug 25, 2012·Plant Signaling & Behavior·Timothy E Proseus, John S Boyer
Jul 26, 2016·Frontiers in Plant Science·John S Boyer
Oct 26, 2016·Frontiers in Plant Science·David S DomozychIben Sørensen
Jan 29, 2017·Current Opinion in Cell Biology·Youssef Chebli, Anja Geitmann
Aug 30, 2018·The New Phytologist·Roger R Lew
Jan 15, 2019·PLoS Biology·Hervé RabilléBénédicte Charrier
Jun 7, 2011·Nature Reviews. Microbiology·Roger R Lew
May 1, 2009·Functional Plant Biology : FPB·John S Boyer
Feb 10, 2021·Current Biology : CB·Duy-Chi TrinhOlivier Hamant

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