Titre
Phloem development.
Type
synthèse (review)
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Auteur(s)
Hardtke, C.S.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
1469-8137
Statut éditorial
Publié
Date de publication
2023-08
Volume
239
Numéro
3
Première page
852
Dernière page/numéro d’article
867
Peer-reviewed
Oui
Langue
anglais
Notes
Publication types: Journal Article ; Review ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Publication Status: ppublish
Résumé
The evolution of the plant vascular system is a key process in Earth history because it enabled plants to conquer land and transform the terrestrial surface. Among the vascular tissues, the phloem is particularly intriguing because of its complex functionality. In angiosperms, its principal components are the sieve elements, which transport phloem sap, and their neighboring companion cells. Together, they form a functional unit that sustains sap loading, transport, and unloading. The developmental trajectory of sieve elements is unique among plant cell types because it entails selective organelle degradation including enucleation. Meticulous analyses of primary, so-called protophloem in the Arabidopsis thaliana root meristem have revealed key steps in protophloem sieve element formation at single-cell resolution. A transcription factor cascade connects specification with differentiation and also orchestrates phloem pole patterning via noncell-autonomous action of sieve element-derived effectors. Reminiscent of vascular tissue patterning in secondary growth, these involve receptor kinase pathways, whose antagonists guide the progression of sieve element differentiation. Receptor kinase pathways may also safeguard phloem formation by maintaining the developmental plasticity of neighboring cell files. Our current understanding of protophloem development in the A. thaliana root has reached sufficient detail to instruct molecular-level investigation of phloem formation in other organs.
PID Serval
serval:BIB_3E130836D8B0
PMID
Open Access
Oui
Date de création
2023-06-16T09:41:26.962Z
Date de création dans IRIS
2025-05-20T19:49:03Z
Fichier(s)![Vignette d'image]()
En cours de chargement...
Nom
37243530.pdf
Version du manuscrit
published
Licence
https://creativecommons.org/licenses/by-nc-nd/4.0
Taille
2.06 MB
Format
Adobe PDF
PID Serval
serval:BIB_3E130836D8B0.P001
URN
urn:nbn:ch:serval-BIB_3E130836D8B05
Somme de contrôle
(MD5):02ba36fb84f1aacc0baae1617a81a641