Auxin regulates aquaporin function to facilitate lateral root emergence.
Benjamin Péret
(1, 2)
,
Guowei Li
(3)
,
Jin Zhao
(4)
,
Leah R Band
(1)
,
Ute Voss
(1)
,
Olivier Postaire
(3)
,
Doan-Trung Luu
(3)
,
Olivier da Ines
(4, 2)
,
Ilda Casimiro
(5)
,
Mikaël Lucas
(1)
,
Darren M Wells
(1)
,
Laure Lazzerini
(1)
,
Philippe Nacry
(3)
,
John R King
(1)
,
Oliver E Jensen
(1, 6)
,
Anton R Schäffner
(4)
,
Christophe Maurel
(3)
,
Malcolm J Bennett
(1)
1
CPIB -
Centre for Plant Integrative Biology [Nothingham]
2 BVME - Biologie végétale et microbiologie environnementale - UMR7265
3 BPMP - Biochimie et Physiologie Moléculaire des Plantes
4 Institute of Biochemical Plant Pathology
5 UEX - Universidad de Extremadura - University of Extremadura
6 School of Mathematics
2 BVME - Biologie végétale et microbiologie environnementale - UMR7265
3 BPMP - Biochimie et Physiologie Moléculaire des Plantes
4 Institute of Biochemical Plant Pathology
5 UEX - Universidad de Extremadura - University of Extremadura
6 School of Mathematics
Benjamin Péret
- Fonction : Auteur
- PersonId : 739151
- IdHAL : benjamin-peret
- ORCID : 0000-0003-1336-0796
- IdRef : 08360958X
Doan-Trung Luu
- Fonction : Auteur
- PersonId : 735165
- IdHAL : dluu
- ORCID : 0000-0001-9765-2125
- IdRef : 203911733
Olivier da Ines
- Fonction : Auteur
- PersonId : 169782
- IdHAL : olivier-da-ines
- ORCID : 0000-0002-1868-3781
- IdRef : 253124379
Philippe Nacry
- Fonction : Auteur
- PersonId : 746490
- IdHAL : philippe-nacry
- ORCID : 0000-0001-7766-4989
- IdRef : 175389519
Anton R Schäffner
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- Fonction : Auteur correspondant
- PersonId : 935488
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Christophe Maurel
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- Fonction : Auteur correspondant
- PersonId : 741828
- IdHAL : christophe-maurel-cnrs
- ORCID : 0000-0002-4255-6440
- IdRef : 074588664
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Malcolm J Bennett
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- Fonction : Auteur correspondant
- PersonId : 935489
Connectez-vous pour contacter l'auteur
Résumé
Aquaporins are membrane channels that facilitate water movement across cell membranes. In plants, aquaporins contribute to water relations. Here, we establish a new link between aquaporin-dependent tissue hydraulics and auxin-regulated root development in Arabidopsis thaliana. We report that most aquaporin genes are repressed during lateral root formation and by exogenous auxin treatment. Auxin reduces root hydraulic conductivity both at the cell and whole-organ levels. The highly expressed aquaporin PIP2;1 is progressively excluded from the site of the auxin response maximum in lateral root primordia (LRP) whilst being maintained at their base and underlying vascular tissues. Modelling predicts that the positive and negative perturbations of PIP2;1 expression alter water flow into LRP, thereby slowing lateral root emergence (LRE). Consistent with this mechanism, pip2;1 mutants and PIP2;1-overexpressing lines exhibit delayed LRE. We conclude that auxin promotes LRE by regulating the spatial and temporal distribution of aquaporin-dependent root tissue water transport.
Domaines
Biologie végétaleFormat du dépôt | Notice |
---|---|
Type de dépôt | Article dans une revue |
Résumé |
en
Aquaporins are membrane channels that facilitate water movement across cell membranes. In plants, aquaporins contribute to water relations. Here, we establish a new link between aquaporin-dependent tissue hydraulics and auxin-regulated root development in Arabidopsis thaliana. We report that most aquaporin genes are repressed during lateral root formation and by exogenous auxin treatment. Auxin reduces root hydraulic conductivity both at the cell and whole-organ levels. The highly expressed aquaporin PIP2;1 is progressively excluded from the site of the auxin response maximum in lateral root primordia (LRP) whilst being maintained at their base and underlying vascular tissues. Modelling predicts that the positive and negative perturbations of PIP2;1 expression alter water flow into LRP, thereby slowing lateral root emergence (LRE). Consistent with this mechanism, pip2;1 mutants and PIP2;1-overexpressing lines exhibit delayed LRE. We conclude that auxin promotes LRE by regulating the spatial and temporal distribution of aquaporin-dependent root tissue water transport.
|
Titre |
fr
Auxin regulates aquaporin function to facilitate lateral root emergence.
|
Auteur(s) |
Benjamin Péret
1, 2
, Guowei Li
3
, Jin Zhao
4
, Leah R Band
1
, Ute Voss
1
, Olivier Postaire
3
, Doan-Trung Luu
3
, Olivier da Ines
4, 2
, Ilda Casimiro
5
, Mikaël Lucas
1
, Darren M Wells
1
, Laure Lazzerini
1
, Philippe Nacry
3
, John R King
1
, Oliver E Jensen
1, 6
, Anton R Schäffner
4
, Christophe Maurel
3
, Malcolm J Bennett
1
1
CPIB -
Centre for Plant Integrative Biology [Nothingham]
( 139449 )
- Loughborough LE12 5RD
- Royaume-Uni
2
BVME -
Biologie végétale et microbiologie environnementale - UMR7265
( 199357 )
- DEVM - bat.177 13108 ST PAUL LES DURANCE CEDEX
- France
3
BPMP -
Biochimie et Physiologie Moléculaire des Plantes
( 538 )
- Bât. 7 - 2 place Pierre Viala - 34060 Montpellier cedex 2
- France
4
Institute of Biochemical Plant Pathology
( 122789 )
- 85764 Neuherberg, Germany
- Allemagne
5
UEX -
Universidad de Extremadura - University of Extremadura
( 303455 )
- Badajoz
Cáceres
Mérida
Plasencia
- Espagne
6
School of Mathematics
( 211929 )
- M13 9PL
- Royaume-Uni
|
Public visé |
Scientifique
|
Page/Identifiant |
991-8
|
Numéro |
10
|
Comité de lecture |
Oui
|
Audience |
Internationale
|
Date de publication |
2012-10
|
Date de publication électronique |
2012-09-16
|
Volume |
14
|
Vulgarisation |
Non
|
Nom de la revue |
|
Langue du document |
Anglais
|
Financement |
|
Mots-clés (Mesh) |
|
Domaine(s) |
|
Mots-clés |
en
ARABIDOPSIS-THALIANA, WATER TRANSPORT, HYDRAULIC CONDUCTIVITY, ARF19, ORGANOGENESIS, MUTAGENESIS, INITIATION
fr
PLASMA-MEMBRANE, CELL ELONGATION, EXPRESSION
|
DOI | 10.1038/ncb2573 |
ProdINRA | 213442 |
Pubmed Id | 22983115 |
UT key WOS | 000309543800008 |
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