Titre
Diffusible repression of cytokinin signalling produces endodermal symmetry and passage cells.
Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Auteur(s)
Andersen, T.G.
Auteure/Auteur
Naseer, S.
Auteure/Auteur
Ursache, R.
Auteure/Auteur
Wybouw, B.
Auteure/Auteur
Smet, W.
Auteure/Auteur
De Rybel, B.
Auteure/Auteur
Vermeer, JEM
Auteure/Auteur
Geldner, N.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
1476-4687
Statut éditorial
Publié
Date de publication
2018
Volume
555
Numéro
7697
Première page
529
Dernière page/numéro d’article
533
Peer-reviewed
Oui
Langue
anglais
Résumé
In vascular plants, the root endodermis surrounds the central vasculature as a protective sheath that is analogous to the polarized epithelium in animals, and contains ring-shaped Casparian strips that restrict diffusion. After an initial lag phase, individual endodermal cells suberize in an apparently random fashion to produce 'patchy' suberization that eventually generates a zone of continuous suberin deposition. Casparian strips and suberin lamellae affect paracellular and transcellular transport, respectively. Most angiosperms maintain some isolated cells in an unsuberized state as so-called 'passage cells', which have previously been suggested to enable uptake across an otherwise-impermeable endodermal barrier. Here we demonstrate that these passage cells are late emanations of a meristematic patterning process that reads out the underlying non-radial symmetry of the vasculature. This process is mediated by the non-cell-autonomous repression of cytokinin signalling in the root meristem, and leads to distinct phloem- and xylem-pole-associated endodermal cells. The latter cells can resist abscisic acid-dependent suberization to produce passage cells. Our data further demonstrate that, during meristematic patterning, xylem-pole-associated endodermal cells can dynamically alter passage-cell numbers in response to nutrient status, and that passage cells express transporters and locally affect the expression of transporters in adjacent cortical cells.
PID Serval
serval:BIB_DA2ADB547BE2
PMID
Date de création
2018-03-15T16:07:41.749Z
Date de création dans IRIS
2025-05-20T22:49:42Z
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Nom
29539635_BIB_DA2ADB547BE2.pdf
Version du manuscrit
postprint
Taille
7.37 MB
Format
Adobe PDF
PID Serval
serval:BIB_DA2ADB547BE2.P001
URN
urn:nbn:ch:serval-BIB_DA2ADB547BE28
Somme de contrôle
(MD5):5452a6b772bbd74311ee37ea2b535283