Cell-type action specificity of auxin on Arabidopsis root growth.
auxin biosynthesis
auxin signaling
root growth
Journal
The Plant journal : for cell and molecular biology
ISSN: 1365-313X
Titre abrégé: Plant J
Pays: England
ID NLM: 9207397
Informations de publication
Date de publication:
05 2021
05 2021
Historique:
revised:
05
02
2021
received:
05
06
2020
accepted:
15
02
2021
pubmed:
21
2
2021
medline:
15
12
2021
entrez:
20
2
2021
Statut:
ppublish
Résumé
The plant hormone auxin plays a critical role in root growth and development; however, the contributions or specific roles of cell-type auxin signals in root growth and development are not well understood. Here, we mapped tissue and cell types that are important for auxin-mediated root growth and development by manipulating the local response and synthesis of auxin. Repressing auxin signaling in the epidermis, cortex, endodermis, pericycle or stele strongly inhibited root growth, with the largest effect observed in the endodermis. Enhancing auxin signaling in the epidermis, cortex, endodermis, pericycle or stele also caused reduced root growth, albeit to a lesser extent. Moreover, we established that root growth was inhibited by enhancement of auxin synthesis in specific cell types of the epidermis, cortex and endodermis, whereas increased auxin synthesis in the pericycle and stele had only minor effects on root growth. Our study thus establishes an association between cellular identity and cell type-specific auxin signaling that guides root growth and development.
Substances chimiques
Indoleacetic Acids
0
Plant Growth Regulators
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
928-941Informations de copyright
© 2021 Society for Experimental Biology and John Wiley & Sons Ltd.
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