---
_id: '1145'
abstract:
- lang: eng
text: Auxin directs plant ontogenesis via differential accumulation within tissues
depending largely on the activity of PIN proteins that mediate auxin efflux from
cells and its directional cell-to-cell transport. Regardless of the developmental
importance of PINs, the structure of these transporters is poorly characterized.
Here, we present experimental data concerning protein topology of plasma membrane-localized
PINs. Utilizing approaches based on pH-dependent quenching of fluorescent reporters
combined with immunolocalization techniques, we mapped the membrane topology of
PINs and further cross-validated our results using available topology modeling
software. We delineated the topology of PIN1 with two transmembrane (TM) bundles
of five α-helices linked by a large intracellular loop and a C-terminus positioned
outside the cytoplasm. Using constraints derived from our experimental data, we
also provide an updated position of helical regions generating a verisimilitude
model of PIN1. Since the canonical long PINs show a high degree of conservation
in TM domains and auxin transport capacity has been demonstrated for Arabidopsis
representatives of this group, this empirically enhanced topological model of
PIN1 will be an important starting point for further studies on PIN structure–function
relationships. In addition, we have established protocols that can be used to
probe the topology of other plasma membrane proteins in plants. © 2016 The Authors
acknowledgement: This research has been financially supported by the Ministry of Education,
Youth and Sports of the Czech Republic under the project CEITEC 2020 (LQ1601) (T.N.,
M.Z., M.P., J.H.), Czech Science Foundation (13-40637S [J.F., M.Z.], 13-39982S [J.H.]);
Research Foundation Flanders (Grant number FWO09/PDO/196) (S.V.) and the European
Research Council (project ERC-2011-StG-20101109-PSDP) (J.F.). We thank David G.
Robinson and Ranjan Swarup for sharing published material; Maria Šimášková, Mamoona
Khan, Eva Benková for technical assistance; and R. Tejos, J. Kleine-Vehn, and E.
Feraru for helpful discussions.
author:
- first_name: Tomasz
full_name: Nodzyński, Tomasz
last_name: Nodzyński
- first_name: Steffen
full_name: Vanneste, Steffen
last_name: Vanneste
- first_name: Marta
full_name: Zwiewka, Marta
last_name: Zwiewka
- first_name: Markéta
full_name: Pernisová, Markéta
last_name: Pernisová
- first_name: Jan
full_name: Hejátko, Jan
last_name: Hejátko
- first_name: Jirí
full_name: Friml, Jirí
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
citation:
ama: Nodzyński T, Vanneste S, Zwiewka M, Pernisová M, Hejátko J, Friml J. Enquiry
into the topology of plasma membrane localized PIN auxin transport components.
Molecular Plant. 2016;9(11):1504-1519. doi:10.1016/j.molp.2016.08.010
apa: Nodzyński, T., Vanneste, S., Zwiewka, M., Pernisová, M., Hejátko, J., &
Friml, J. (2016). Enquiry into the topology of plasma membrane localized PIN auxin
transport components. Molecular Plant. Cell Press. https://doi.org/10.1016/j.molp.2016.08.010
chicago: Nodzyński, Tomasz, Steffen Vanneste, Marta Zwiewka, Markéta Pernisová,
Jan Hejátko, and Jiří Friml. “Enquiry into the Topology of Plasma Membrane Localized
PIN Auxin Transport Components.” Molecular Plant. Cell Press, 2016. https://doi.org/10.1016/j.molp.2016.08.010.
ieee: T. Nodzyński, S. Vanneste, M. Zwiewka, M. Pernisová, J. Hejátko, and J. Friml,
“Enquiry into the topology of plasma membrane localized PIN auxin transport components,”
Molecular Plant, vol. 9, no. 11. Cell Press, pp. 1504–1519, 2016.
ista: Nodzyński T, Vanneste S, Zwiewka M, Pernisová M, Hejátko J, Friml J. 2016.
Enquiry into the topology of plasma membrane localized PIN auxin transport components.
Molecular Plant. 9(11), 1504–1519.
mla: Nodzyński, Tomasz, et al. “Enquiry into the Topology of Plasma Membrane Localized
PIN Auxin Transport Components.” Molecular Plant, vol. 9, no. 11, Cell
Press, 2016, pp. 1504–19, doi:10.1016/j.molp.2016.08.010.
short: T. Nodzyński, S. Vanneste, M. Zwiewka, M. Pernisová, J. Hejátko, J. Friml,
Molecular Plant 9 (2016) 1504–1519.
date_created: 2018-12-11T11:50:23Z
date_published: 2016-11-07T00:00:00Z
date_updated: 2021-01-12T06:48:37Z
day: '07'
ddc:
- '581'
department:
- _id: JiFr
doi: 10.1016/j.molp.2016.08.010
ec_funded: 1
file:
- access_level: open_access
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:13:22Z
date_updated: 2018-12-12T10:13:22Z
file_id: '5004'
file_name: IST-2017-746-v1+1_1-s2.0-S1674205216301915-main.pdf
file_size: 5005876
relation: main_file
file_date_updated: 2018-12-12T10:13:22Z
has_accepted_license: '1'
intvolume: ' 9'
issue: '11'
language:
- iso: eng
month: '11'
oa: 1
oa_version: Published Version
page: 1504 - 1519
project:
- _id: 25716A02-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '282300'
name: Polarity and subcellular dynamics in plants
publication: Molecular Plant
publication_status: published
publisher: Cell Press
publist_id: '6213'
pubrep_id: '746'
quality_controlled: '1'
scopus_import: 1
status: public
title: Enquiry into the topology of plasma membrane localized PIN auxin transport
components
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 9
year: '2016'
...
---
_id: '1147'
abstract:
- lang: eng
text: Apical dominance is one of the fundamental developmental phenomena in plant
biology, which determines the overall architecture of aerial plant parts. Here
we show apex decapitation activated competition for dominance in adjacent upper
and lower axillary buds. A two-nodal-bud pea (Pisum sativum L.) was used as a
model system to monitor and assess auxin flow, auxin transport channels, and dormancy
and initiation status of axillary buds. Auxin flow was manipulated by lateral
stem wounds or chemically by auxin efflux inhibitors 2,3,5-triiodobenzoic acid
(TIBA), 1-N-naphtylphtalamic acid (NPA), or protein synthesis inhibitor cycloheximide
(CHX) treatments, which served to interfere with axillary bud competition. Redirecting
auxin flow to different points influenced which bud formed the outgrowing and
dominant shoot. The obtained results proved that competition between upper and
lower axillary buds as secondary auxin sources is based on the same auxin canalization
principle that operates between the shoot apex and axillary bud. © The Author(s)
2016.
acknowledgement: This research was carried out under the project CEITEC 2020 (LQ1601)
with financial support from the Ministry of Education, Youth and Sports of the Czech
Republic under the National Sustainability Programme II., supported by the project
“CEITEC–Central European Institute of Technology” (CZ.1.05/1.1.00/02.0068) and the
Agronomy faculty grant from Mendel University “IGA AF MENDELU” (IP 14/2013).
article_number: '35955'
author:
- first_name: Jozef
full_name: Balla, Jozef
last_name: Balla
- first_name: Zuzana
full_name: Medved'Ová, Zuzana
last_name: Medved'Ová
- first_name: Petr
full_name: Kalousek, Petr
last_name: Kalousek
- first_name: Natálie
full_name: Matiješčuková, Natálie
last_name: Matiješčuková
- first_name: Jirí
full_name: Friml, Jirí
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Vilém
full_name: Reinöhl, Vilém
last_name: Reinöhl
- first_name: Stanislav
full_name: Procházka, Stanislav
last_name: Procházka
citation:
ama: Balla J, Medved’Ová Z, Kalousek P, et al. Auxin flow mediated competition between
axillary buds to restore apical dominance. Scientific Reports. 2016;6.
doi:10.1038/srep35955
apa: Balla, J., Medved’Ová, Z., Kalousek, P., Matiješčuková, N., Friml, J., Reinöhl,
V., & Procházka, S. (2016). Auxin flow mediated competition between axillary
buds to restore apical dominance. Scientific Reports. Nature Publishing
Group. https://doi.org/10.1038/srep35955
chicago: Balla, Jozef, Zuzana Medved’Ová, Petr Kalousek, Natálie Matiješčuková,
Jiří Friml, Vilém Reinöhl, and Stanislav Procházka. “Auxin Flow Mediated Competition
between Axillary Buds to Restore Apical Dominance.” Scientific Reports.
Nature Publishing Group, 2016. https://doi.org/10.1038/srep35955.
ieee: J. Balla et al., “Auxin flow mediated competition between axillary
buds to restore apical dominance,” Scientific Reports, vol. 6. Nature Publishing
Group, 2016.
ista: Balla J, Medved’Ová Z, Kalousek P, Matiješčuková N, Friml J, Reinöhl V, Procházka
S. 2016. Auxin flow mediated competition between axillary buds to restore apical
dominance. Scientific Reports. 6, 35955.
mla: Balla, Jozef, et al. “Auxin Flow Mediated Competition between Axillary Buds
to Restore Apical Dominance.” Scientific Reports, vol. 6, 35955, Nature
Publishing Group, 2016, doi:10.1038/srep35955.
short: J. Balla, Z. Medved’Ová, P. Kalousek, N. Matiješčuková, J. Friml, V. Reinöhl,
S. Procházka, Scientific Reports 6 (2016).
date_created: 2018-12-11T11:50:24Z
date_published: 2016-11-08T00:00:00Z
date_updated: 2021-01-12T06:48:38Z
day: '08'
ddc:
- '581'
department:
- _id: JiFr
doi: 10.1038/srep35955
file:
- access_level: open_access
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:09:28Z
date_updated: 2018-12-12T10:09:28Z
file_id: '4752'
file_name: IST-2017-745-v1+1_srep35955.pdf
file_size: 1587544
relation: main_file
file_date_updated: 2018-12-12T10:09:28Z
has_accepted_license: '1'
intvolume: ' 6'
language:
- iso: eng
month: '11'
oa: 1
oa_version: Published Version
publication: Scientific Reports
publication_status: published
publisher: Nature Publishing Group
publist_id: '6211'
pubrep_id: '745'
quality_controlled: '1'
scopus_import: 1
status: public
title: Auxin flow mediated competition between axillary buds to restore apical dominance
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 6
year: '2016'
...
---
_id: '1151'
abstract:
- lang: eng
text: Tissue patterning in multicellular organisms is the output of precise spatio–temporal
regulation of gene expression coupled with changes in hormone dynamics. In plants,
the hormone auxin regulates growth and development at every stage of a plant’s
life cycle. Auxin signaling occurs through binding of the auxin molecule to a
TIR1/AFB F-box ubiquitin ligase, allowing interaction with Aux/IAA transcriptional
repressor proteins. These are subsequently ubiquitinated and degraded via the
26S proteasome, leading to derepression of auxin response factors (ARFs). How
auxin is able to elicit such a diverse range of developmental responses through
a single signaling module has not yet been resolved. Here we present an alternative
auxin-sensing mechanism in which the ARF ARF3/ETTIN controls gene expression through
interactions with process-specific transcription factors. This noncanonical hormonesensing
mechanism exhibits strong preference for the naturally occurring auxin indole
3-acetic acid (IAA) and is important for coordinating growth and patterning in
diverse developmental contexts such as gynoecium morphogenesis, lateral root emergence,
ovule development, and primary branch formation. Disrupting this IAA-sensing ability
induces morphological aberrations with consequences for plant fitness. Therefore,
our findings introduce a novel transcription factor-based mechanism of hormone
perception in plants. © 2016 Simonini et al.
acknowledgement: "We thank Norwich Research Park Bioimaging, Grant Calder, Roy\r\nDunford,
Caroline Smith, Paul Thomas, and Mark Youles for\r\ntechnical support; Charlie Scutt,
Alejandro Ferrando, and George\r\nLomonossoff for plasmids; Toshiro Ito for seeds;
Brendan Davies\r\nand Barry Causier for the REGIA library; and Mark Buttner,\r\nSimona
Masiero, Fabio Rossi, Doris Wagner, and Jun Xiao for\r\nhelp and material. We are
also grateful to Stefano Bencivenga,\r\nMarie Brüser, Friederike Jantzen, Lukasz
Langowski, Xinran Li,\r\nand Nicola Stacey for discussions and helpful comments
on the\r\nmanuscript. This work was supported by grants BB/M004112/1\r\nand BB/I017232/1
(Crop Improvement Research Club) to L.Ø.\r\nfrom the Biotechnological and Biological
Sciences Research\r\nCouncil, and Institute Strategic Programme grant (BB/J004553/\r\n1)
to the John Innes Centre. S.S., J.D., and L.Ø conceived the ex-\r\nperiments. "
author:
- first_name: Sara
full_name: Simonini, Sara
last_name: Simonini
- first_name: Joyita
full_name: Deb, Joyita
last_name: Deb
- first_name: Laila
full_name: Moubayidin, Laila
last_name: Moubayidin
- first_name: Pauline
full_name: Stephenson, Pauline
last_name: Stephenson
- first_name: Manoj
full_name: Valluru, Manoj
last_name: Valluru
- first_name: Alejandra
full_name: Freire Rios, Alejandra
last_name: Freire Rios
- first_name: Karim
full_name: Sorefan, Karim
last_name: Sorefan
- first_name: Dolf
full_name: Weijers, Dolf
last_name: Weijers
- first_name: Jirí
full_name: Friml, Jirí
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Lars
full_name: Östergaard, Lars
last_name: Östergaard
citation:
ama: Simonini S, Deb J, Moubayidin L, et al. A noncanonical auxin sensing mechanism
is required for organ morphogenesis in arabidopsis. Genes and Development.
2016;30(20):2286-2296. doi:10.1101/gad.285361.116
apa: Simonini, S., Deb, J., Moubayidin, L., Stephenson, P., Valluru, M., Freire
Rios, A., … Östergaard, L. (2016). A noncanonical auxin sensing mechanism is required
for organ morphogenesis in arabidopsis. Genes and Development. Cold Spring
Harbor Laboratory Press. https://doi.org/10.1101/gad.285361.116
chicago: Simonini, Sara, Joyita Deb, Laila Moubayidin, Pauline Stephenson, Manoj
Valluru, Alejandra Freire Rios, Karim Sorefan, Dolf Weijers, Jiří Friml, and Lars
Östergaard. “A Noncanonical Auxin Sensing Mechanism Is Required for Organ Morphogenesis
in Arabidopsis.” Genes and Development. Cold Spring Harbor Laboratory Press,
2016. https://doi.org/10.1101/gad.285361.116.
ieee: S. Simonini et al., “A noncanonical auxin sensing mechanism is required
for organ morphogenesis in arabidopsis,” Genes and Development, vol. 30,
no. 20. Cold Spring Harbor Laboratory Press, pp. 2286–2296, 2016.
ista: Simonini S, Deb J, Moubayidin L, Stephenson P, Valluru M, Freire Rios A, Sorefan
K, Weijers D, Friml J, Östergaard L. 2016. A noncanonical auxin sensing mechanism
is required for organ morphogenesis in arabidopsis. Genes and Development. 30(20),
2286–2296.
mla: Simonini, Sara, et al. “A Noncanonical Auxin Sensing Mechanism Is Required
for Organ Morphogenesis in Arabidopsis.” Genes and Development, vol. 30,
no. 20, Cold Spring Harbor Laboratory Press, 2016, pp. 2286–96, doi:10.1101/gad.285361.116.
short: S. Simonini, J. Deb, L. Moubayidin, P. Stephenson, M. Valluru, A. Freire
Rios, K. Sorefan, D. Weijers, J. Friml, L. Östergaard, Genes and Development 30
(2016) 2286–2296.
date_created: 2018-12-11T11:50:25Z
date_published: 2016-10-15T00:00:00Z
date_updated: 2021-01-12T06:48:39Z
day: '15'
ddc:
- '570'
department:
- _id: JiFr
doi: 10.1101/gad.285361.116
external_id:
pmid:
- '27898393'
file:
- access_level: open_access
content_type: application/pdf
creator: dernst
date_created: 2019-01-25T09:32:55Z
date_updated: 2019-01-25T09:32:55Z
file_id: '5882'
file_name: 2016_GeneDev_Simonini.pdf
file_size: 1419263
relation: main_file
success: 1
file_date_updated: 2019-01-25T09:32:55Z
has_accepted_license: '1'
intvolume: ' 30'
issue: '20'
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
page: 2286 - 2296
pmid: 1
publication: Genes and Development
publication_status: published
publisher: Cold Spring Harbor Laboratory Press
publist_id: '6207'
quality_controlled: '1'
scopus_import: 1
status: public
title: A noncanonical auxin sensing mechanism is required for organ morphogenesis
in arabidopsis
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 30
year: '2016'
...
---
_id: '1153'
abstract:
- lang: eng
text: Differential cell growth enables flexible organ bending in the presence of
environmental signals such as light or gravity. A prominent example of the developmental
processes based on differential cell growth is the formation of the apical hook
that protects the fragile shoot apical meristem when it breaks through the soil
during germination. Here, we combined in silico and in vivo approaches to identify
a minimal mechanism producing auxin gradient-guided differential growth during
the establishment of the apical hook in the model plant Arabidopsis thaliana.
Computer simulation models based on experimental data demonstrate that asymmetric
expression of the PIN-FORMED auxin efflux carrier at the concave (inner) versus
convex (outer) side of the hook suffices to establish an auxin maximum in the
epidermis at the concave side of the apical hook. Furthermore, we propose a mechanism
that translates this maximum into differential growth, and thus curvature, of
the apical hook. Through a combination of experimental and in silico computational
approaches, we have identified the individual contributions of differential cell
elongation and proliferation to defining the apical hook and reveal the role of
auxin-ethylene crosstalk in balancing these two processes. © 2016 American Society
of Plant Biologists. All rights reserved.
acknowledgement: "We thank Martine De Cock and Annick Bleys for help in preparing
the manuscript, Daniel Van Damme for sharing material and stimulating discussion,
and Rudiger Simon for support during revision of the manuscript.\r\nThis work was
supported by grants from the European Research Council (StartingIndependentResearchGrantERC-2007-Stg-207362-HCPO)and
the Czech Science Foundation (GACR CZ.1.07/2.3.00/20.0043) to E.B.\r\nand Natural
Sciences and Engineering Research Council of Canada Discovery Grant 2014-05325 to
P.P. K.W. acknowledges funding from a Human Frontier Science Program Long-Term Fellowship
(LT-000209-2014)."
author:
- first_name: Petra
full_name: Žádníková, Petra
last_name: Žádníková
- first_name: Krzysztof T
full_name: Wabnik, Krzysztof T
id: 4DE369A4-F248-11E8-B48F-1D18A9856A87
last_name: Wabnik
orcid: 0000-0001-7263-0560
- first_name: Anas
full_name: Abuzeineh, Anas
last_name: Abuzeineh
- first_name: Marçal
full_name: Gallemí, Marçal
last_name: Gallemí
- first_name: Dominique
full_name: Van Der Straeten, Dominique
last_name: Van Der Straeten
- first_name: Richard
full_name: Smith, Richard
last_name: Smith
- first_name: Dirk
full_name: Inze, Dirk
last_name: Inze
- first_name: Jirí
full_name: Friml, Jirí
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Przemysław
full_name: Prusinkiewicz, Przemysław
last_name: Prusinkiewicz
- first_name: Eva
full_name: Benková, Eva
id: 38F4F166-F248-11E8-B48F-1D18A9856A87
last_name: Benková
orcid: 0000-0002-8510-9739
citation:
ama: Žádníková P, Wabnik KT, Abuzeineh A, et al. A model of differential growth
guided apical hook formation in plants. Plant Cell. 2016;28(10):2464-2477.
doi:10.1105/tpc.15.00569
apa: Žádníková, P., Wabnik, K. T., Abuzeineh, A., Gallemí, M., Van Der Straeten,
D., Smith, R., … Benková, E. (2016). A model of differential growth guided apical
hook formation in plants. Plant Cell. American Society of Plant Biologists.
https://doi.org/10.1105/tpc.15.00569
chicago: Žádníková, Petra, Krzysztof T Wabnik, Anas Abuzeineh, Marçal Gallemí, Dominique
Van Der Straeten, Richard Smith, Dirk Inze, Jiří Friml, Przemysław Prusinkiewicz,
and Eva Benková. “A Model of Differential Growth Guided Apical Hook Formation
in Plants.” Plant Cell. American Society of Plant Biologists, 2016. https://doi.org/10.1105/tpc.15.00569.
ieee: P. Žádníková et al., “A model of differential growth guided apical
hook formation in plants,” Plant Cell, vol. 28, no. 10. American Society
of Plant Biologists, pp. 2464–2477, 2016.
ista: Žádníková P, Wabnik KT, Abuzeineh A, Gallemí M, Van Der Straeten D, Smith
R, Inze D, Friml J, Prusinkiewicz P, Benková E. 2016. A model of differential
growth guided apical hook formation in plants. Plant Cell. 28(10), 2464–2477.
mla: Žádníková, Petra, et al. “A Model of Differential Growth Guided Apical Hook
Formation in Plants.” Plant Cell, vol. 28, no. 10, American Society of
Plant Biologists, 2016, pp. 2464–77, doi:10.1105/tpc.15.00569.
short: P. Žádníková, K.T. Wabnik, A. Abuzeineh, M. Gallemí, D. Van Der Straeten,
R. Smith, D. Inze, J. Friml, P. Prusinkiewicz, E. Benková, Plant Cell 28 (2016)
2464–2477.
date_created: 2018-12-11T11:50:26Z
date_published: 2016-10-01T00:00:00Z
date_updated: 2021-01-12T06:48:40Z
day: '01'
department:
- _id: EvBe
- _id: JiFr
doi: 10.1105/tpc.15.00569
ec_funded: 1
intvolume: ' 28'
issue: '10'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5134968/
month: '10'
oa: 1
oa_version: Submitted Version
page: 2464 - 2477
project:
- _id: 253FCA6A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '207362'
name: Hormonal cross-talk in plant organogenesis
publication: Plant Cell
publication_status: published
publisher: American Society of Plant Biologists
publist_id: '6205'
quality_controlled: '1'
scopus_import: 1
status: public
title: A model of differential growth guided apical hook formation in plants
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 28
year: '2016'
...
---
_id: '1212'
abstract:
- lang: eng
text: 'Plants adjust their growth according to gravity. Gravitropism involves gravity
perception, signal transduction, and asymmetric growth response, with organ bending
as a consequence [1]. Asymmetric growth results from the asymmetric distribution
of the plant-specific signaling molecule auxin [2] that is generated by lateral
transport, mediated in the hypocotyl predominantly by the auxin transporter PIN-FORMED3
(PIN3) [3–5]. Gravity stimulation polarizes PIN3 to the bottom sides of endodermal
cells, correlating with increased auxin accumulation in adjacent tissues at the
lower side of the stimulated organ, where auxin induces cell elongation and, hence,
organ bending. A curvature response allows the hypocotyl to resume straight growth
at a defined angle [6], implying that at some point auxin symmetry is restored
to prevent overbending. Here, we present initial insights into cellular and molecular
mechanisms that lead to the termination of the tropic response. We identified
an auxin feedback on PIN3 polarization as underlying mechanism that restores symmetry
of the PIN3-dependent auxin flow. Thus, two mechanistically distinct PIN3 polarization
events redirect auxin fluxes at different time points of the gravity response:
first, gravity-mediated redirection of PIN3-mediated auxin flow toward the lower
hypocotyl side, where auxin gradually accumulates and promotes growth, and later
PIN3 polarization to the opposite cell side, depleting this auxin maximum to end
the bending. Accordingly, genetic or pharmacological interference with the late
PIN3 polarization prevents termination of the response and leads to hypocotyl
overbending. This observation reveals a role of auxin feedback on PIN polarity
in the termination of the tropic response. © 2016 Elsevier Ltd'
acknowledgement: "We thank Dr. Jie Li (Key Laboratory of Plant Molecular Physiology,
Chinese Academy of Science, China) for the pPIN3::PIN3-GFP/DII::VENUS line and Martine
De Cock for help in preparing the manuscript. This work was supported by the European
Research Council (project ERC-2011-StG-20101109-PSDP), by the Czech Science Foundation
GAČR (GA13-40637S) to J.F., and by the Ministry of Education, Youth and Sports of
the Czech Republic under the project CEITEC 2020 (LQ1601) to H.S.R. H.R. is indebted
to the Agency for Innovation by Science and Technology (IWT) for a predoctoral fellowship.\r\n"
author:
- first_name: Hana
full_name: Rakusová, Hana
last_name: Rakusová
- first_name: Mohamad
full_name: Abbas, Mohamad
id: 47E8FC1C-F248-11E8-B48F-1D18A9856A87
last_name: Abbas
- first_name: Huibin
full_name: Han, Huibin
id: 31435098-F248-11E8-B48F-1D18A9856A87
last_name: Han
- first_name: Siyuan
full_name: Song, Siyuan
last_name: Song
- first_name: Hélène
full_name: Robert, Hélène
last_name: Robert
- first_name: Jirí
full_name: Friml, Jirí
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
citation:
ama: Rakusová H, Abbas M, Han H, Song S, Robert H, Friml J. Termination of shoot
gravitropic responses by auxin feedback on PIN3 polarity. Current Biology.
2016;26(22):3026-3032. doi:10.1016/j.cub.2016.08.067
apa: Rakusová, H., Abbas, M., Han, H., Song, S., Robert, H., & Friml, J. (2016).
Termination of shoot gravitropic responses by auxin feedback on PIN3 polarity.
Current Biology. Cell Press. https://doi.org/10.1016/j.cub.2016.08.067
chicago: Rakusová, Hana, Mohamad Abbas, Huibin Han, Siyuan Song, Hélène Robert,
and Jiří Friml. “Termination of Shoot Gravitropic Responses by Auxin Feedback
on PIN3 Polarity.” Current Biology. Cell Press, 2016. https://doi.org/10.1016/j.cub.2016.08.067.
ieee: H. Rakusová, M. Abbas, H. Han, S. Song, H. Robert, and J. Friml, “Termination
of shoot gravitropic responses by auxin feedback on PIN3 polarity,” Current
Biology, vol. 26, no. 22. Cell Press, pp. 3026–3032, 2016.
ista: Rakusová H, Abbas M, Han H, Song S, Robert H, Friml J. 2016. Termination of
shoot gravitropic responses by auxin feedback on PIN3 polarity. Current Biology.
26(22), 3026–3032.
mla: Rakusová, Hana, et al. “Termination of Shoot Gravitropic Responses by Auxin
Feedback on PIN3 Polarity.” Current Biology, vol. 26, no. 22, Cell Press,
2016, pp. 3026–32, doi:10.1016/j.cub.2016.08.067.
short: H. Rakusová, M. Abbas, H. Han, S. Song, H. Robert, J. Friml, Current Biology
26 (2016) 3026–3032.
date_created: 2018-12-11T11:50:44Z
date_published: 2016-11-21T00:00:00Z
date_updated: 2021-01-12T06:49:08Z
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ddc:
- '581'
department:
- _id: JiFr
doi: 10.1016/j.cub.2016.08.067
ec_funded: 1
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page: 3026 - 3032
project:
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call_identifier: FP7
grant_number: '282300'
name: Polarity and subcellular dynamics in plants
publication: Current Biology
publication_status: published
publisher: Cell Press
publist_id: '6138'
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title: Termination of shoot gravitropic responses by auxin feedback on PIN3 polarity
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 26
year: '2016'
...