Two chemically distinct root lignin barriers control solute and water balance.

Details

Serval ID
serval:BIB_9B754D3BD8A9
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Two chemically distinct root lignin barriers control solute and water balance.
Journal
Nature communications
Author(s)
Reyt G., Ramakrishna P., Salas-González I., Fujita S., Love A., Tiemessen D., Lapierre C., Morreel K., Calvo-Polanco M., Flis P., Geldner N., Boursiac Y., Boerjan W., George M.W., Castrillo G., Salt D.E.
ISSN
2041-1723 (Electronic)
ISSN-L
2041-1723
Publication state
Published
Issued date
19/04/2021
Peer-reviewed
Oui
Volume
12
Number
1
Pages
2320
Language
english
Notes
Publication types: Journal Article
Publication Status: epublish
Abstract
Lignin is a complex polymer deposited in the cell wall of specialised plant cells, where it provides essential cellular functions. Plants coordinate timing, location, abundance and composition of lignin deposition in response to endogenous and exogenous cues. In roots, a fine band of lignin, the Casparian strip encircles endodermal cells. This forms an extracellular barrier to solutes and water and plays a critical role in maintaining nutrient homeostasis. A signalling pathway senses the integrity of this diffusion barrier and can induce over-lignification to compensate for barrier defects. Here, we report that activation of this endodermal sensing mechanism triggers a transcriptional reprogramming strongly inducing the phenylpropanoid pathway and immune signaling. This leads to deposition of compensatory lignin that is chemically distinct from Casparian strip lignin. We also report that a complete loss of endodermal lignification drastically impacts mineral nutrients homeostasis and plant growth.
Pubmed
Open Access
Yes
Create date
26/04/2021 9:53
Last modification date
25/05/2021 6:34
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