The Arabidopsis R-SNARE VAMP714 is essential for polarisation of PIN proteins and auxin responses.
Arabidopsis thaliana
PIN proteins
R-SNARE
VAMP714
auxin transport
Journal
The New phytologist
ISSN: 1469-8137
Titre abrégé: New Phytol
Pays: England
ID NLM: 9882884
Informations de publication
Date de publication:
04 2021
04 2021
Historique:
received:
18
09
2020
accepted:
23
12
2020
pubmed:
18
1
2021
medline:
15
5
2021
entrez:
17
1
2021
Statut:
ppublish
Résumé
The plant hormone auxin and its directional intercellular transport play a major role in diverse aspects of plant growth and development. The establishment of auxin gradients requires the asymmetric distribution of members of the auxin efflux carrier PIN-FORMED (PIN) protein family to the plasma membrane. An endocytic pathway regulates the recycling of PIN proteins between the plasma membrane and endosomes, providing a mechanism for dynamic localisation. N-Ethylmaleimide-sensitive factor adaptor protein receptors (SNAP receptors, SNAREs) mediate fusion between vesicles and target membranes and are classed as Q- or R-SNAREs based on their sequence. We analysed gain- and loss-of-function mutants, dominant-negative transgenics and localisation of the Arabidopsis R-SNARE VAMP714 protein to understand its function. We demonstrate that VAMP714 is essential for the insertion of PINs into the plasma membrane, for polar auxin transport, root gravitropism and morphogenesis. VAMP714 gene expression is upregulated by auxin, and the VAMP714 protein co-localises with endoplasmic reticulum and Golgi vesicles and with PIN proteins at the plasma membrane. It is proposed that VAMP714 mediates the delivery of PIN-carrying vesicles to the plasma membrane, and that this forms part of a positive regulatory loop in which auxin activates a VAMP714-dependent PIN/auxin transport system to control development.
Identifiants
pubmed: 33454983
doi: 10.1111/nph.17205
pmc: PMC8651015
doi:
Substances chimiques
Arabidopsis Proteins
0
Indoleacetic Acids
0
SNARE Proteins
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
550-566Subventions
Organisme : Biotechnology and Biological Sciences Research Council
ID : BBS/B/0773X
Pays : United Kingdom
Organisme : Biotechnology and Biological Sciences Research Council
ID : BB/M011186/1
Pays : United Kingdom
Informations de copyright
© 2021 The Authors. New Phytologist © 2021 New Phytologist Foundation.
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