Surveillance of cell wall diffusion barrier integrity modulates water and solute transport in plants.

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State: Public
Version: Final published version
License: CC BY 4.0
Serval ID
serval:BIB_18E77FD01EF5
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Surveillance of cell wall diffusion barrier integrity modulates water and solute transport in plants.
Journal
Scientific Reports
Author(s)
Wang P., Calvo-Polanco M., Reyt G., Barberon M., Champeyroux C., Santoni V., Maurel C., Franke R.B., Ljung K., Novak O., Geldner N., Boursiac Y., Salt D.E.
ISSN
2045-2322 (Electronic)
ISSN-L
2045-2322
Publication state
Published
Issued date
2019
Peer-reviewed
Oui
Volume
9
Number
1
Pages
4227
Language
english
Abstract
The endodermis is a key cell layer in plant roots that contributes to the controlled uptake of water and mineral nutrients into plants. In order to provide such functionality the endodermal cell wall has specific chemical modifications consisting of lignin bands (Casparian strips) that encircle each cell, and deposition of a waxy-like substance (suberin) between the wall and the plasma membrane. These two extracellular deposits provide control of diffusion enabling the endodermis to direct the movement of water and solutes into and out of the vascular system in roots. Loss of integrity of the Casparian strip-based apoplastic barrier is sensed by the leakage of a small peptide from the stele into the cortex. Here, we report that such sensing of barrier integrity leads to the rebalancing of water and mineral nutrient uptake, compensating for breakage of Casparian strips. This rebalancing involves both a reduction in root hydraulic conductivity driven by deactivation of aquaporins, and downstream limitation of ion leakage through deposition of suberin. These responses in the root are also coupled to a reduction in water demand in the shoot mediated by ABA-dependent stomatal closure.
Pubmed
Web of science
Open Access
Yes
Create date
01/04/2019 7:20
Last modification date
20/08/2019 12:49
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