---
_id: '8138'
abstract:
- lang: eng
text: Directional transport of the phytohormone auxin is a versatile, plant-specific
mechanism regulating many aspects of plant development. The recently identified
plant hormones, strigolactones (SLs), are implicated in many plant traits; among
others, they modify the phenotypic output of PIN-FORMED (PIN) auxin transporters
for fine-tuning of growth and developmental responses. Here, we show in pea and
Arabidopsis that SLs target processes dependent on the canalization of auxin flow,
which involves auxin feedback on PIN subcellular distribution. D14 receptor- and
MAX2 F-box-mediated SL signaling inhibits the formation of auxin-conducting channels
after wounding or from artificial auxin sources, during vasculature de novo formation
and regeneration. At the cellular level, SLs interfere with auxin effects on PIN
polar targeting, constitutive PIN trafficking as well as clathrin-mediated endocytosis.
Our results identify a non-transcriptional mechanism of SL action, uncoupling
auxin feedback on PIN polarity and trafficking, thereby regulating vascular tissue
formation and regeneration.
acknowledgement: We are grateful to David Nelson for providing published materials
and extremely helpful comments, and Elizabeth Dun and Christine Beveridge for helpful
discussions. The research leading to these results has received funding from the
European Research Council (ERC) under the European Union's Horizon 2020 research
and innovation programme (742985). This work was also supported by the Beijing Municipal
Natural Science Foundation (5192011), Beijing Outstanding University Discipline
Program, the National Natural Science Foundation of China (31370309), CEITEC 2020
(LQ1601) project with financial contribution made by the Ministry of Education,
Youth and Sports of the Czech Republic within special support paid from the National
Program of Sustainability II funds, Australian Research Council (FT180100081), and
China Postdoctoral Science Foundation (2019M660864).
article_processing_charge: No
article_type: original
author:
- first_name: J
full_name: Zhang, J
last_name: Zhang
- first_name: E
full_name: Mazur, E
last_name: Mazur
- first_name: J
full_name: Balla, J
last_name: Balla
- first_name: Michelle C
full_name: Gallei, Michelle C
id: 35A03822-F248-11E8-B48F-1D18A9856A87
last_name: Gallei
orcid: 0000-0003-1286-7368
- first_name: P
full_name: Kalousek, P
last_name: Kalousek
- first_name: Z
full_name: Medveďová, Z
last_name: Medveďová
- first_name: Y
full_name: Li, Y
last_name: Li
- first_name: Y
full_name: Wang, Y
last_name: Wang
- first_name: Tomas
full_name: Prat, Tomas
id: 3DA3BFEE-F248-11E8-B48F-1D18A9856A87
last_name: Prat
- first_name: Mina K
full_name: Vasileva, Mina K
id: 3407EB18-F248-11E8-B48F-1D18A9856A87
last_name: Vasileva
- first_name: V
full_name: Reinöhl, V
last_name: Reinöhl
- first_name: S
full_name: Procházka, S
last_name: Procházka
- first_name: R
full_name: Halouzka, R
last_name: Halouzka
- first_name: P
full_name: Tarkowski, P
last_name: Tarkowski
- first_name: C
full_name: Luschnig, C
last_name: Luschnig
- first_name: PB
full_name: Brewer, PB
last_name: Brewer
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
citation:
ama: Zhang J, Mazur E, Balla J, et al. Strigolactones inhibit auxin feedback on
PIN-dependent auxin transport canalization. Nature Communications. 2020;11(1):3508.
doi:10.1038/s41467-020-17252-y
apa: Zhang, J., Mazur, E., Balla, J., Gallei, M. C., Kalousek, P., Medveďová, Z.,
… Friml, J. (2020). Strigolactones inhibit auxin feedback on PIN-dependent auxin
transport canalization. Nature Communications. Springer Nature. https://doi.org/10.1038/s41467-020-17252-y
chicago: Zhang, J, E Mazur, J Balla, Michelle C Gallei, P Kalousek, Z Medveďová,
Y Li, et al. “Strigolactones Inhibit Auxin Feedback on PIN-Dependent Auxin Transport
Canalization.” Nature Communications. Springer Nature, 2020. https://doi.org/10.1038/s41467-020-17252-y.
ieee: J. Zhang et al., “Strigolactones inhibit auxin feedback on PIN-dependent
auxin transport canalization,” Nature Communications, vol. 11, no. 1. Springer
Nature, p. 3508, 2020.
ista: Zhang J, Mazur E, Balla J, Gallei MC, Kalousek P, Medveďová Z, Li Y, Wang
Y, Prat T, Vasileva MK, Reinöhl V, Procházka S, Halouzka R, Tarkowski P, Luschnig
C, Brewer P, Friml J. 2020. Strigolactones inhibit auxin feedback on PIN-dependent
auxin transport canalization. Nature Communications. 11(1), 3508.
mla: Zhang, J., et al. “Strigolactones Inhibit Auxin Feedback on PIN-Dependent Auxin
Transport Canalization.” Nature Communications, vol. 11, no. 1, Springer
Nature, 2020, p. 3508, doi:10.1038/s41467-020-17252-y.
short: J. Zhang, E. Mazur, J. Balla, M.C. Gallei, P. Kalousek, Z. Medveďová, Y.
Li, Y. Wang, T. Prat, M.K. Vasileva, V. Reinöhl, S. Procházka, R. Halouzka, P.
Tarkowski, C. Luschnig, P. Brewer, J. Friml, Nature Communications 11 (2020) 3508.
date_created: 2020-07-21T08:58:07Z
date_published: 2020-07-14T00:00:00Z
date_updated: 2023-08-22T08:13:44Z
day: '14'
ddc:
- '580'
department:
- _id: JiFr
doi: 10.1038/s41467-020-17252-y
ec_funded: 1
external_id:
isi:
- '000550062200004'
pmid:
- '32665554'
file:
- access_level: open_access
content_type: application/pdf
creator: dernst
date_created: 2020-07-22T08:32:55Z
date_updated: 2020-07-22T08:32:55Z
file_id: '8148'
file_name: 2020_NatureComm_Zhang.pdf
file_size: 1759490
relation: main_file
success: 1
file_date_updated: 2020-07-22T08:32:55Z
has_accepted_license: '1'
intvolume: ' 11'
isi: 1
issue: '1'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
page: '3508'
pmid: 1
project:
- _id: 261099A6-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '742985'
name: Tracing Evolution of Auxin Transport and Polarity in Plants
publication: Nature Communications
publication_identifier:
issn:
- 2041-1723
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
record:
- id: '11626'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Strigolactones inhibit auxin feedback on PIN-dependent auxin transport canalization
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: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 11
year: '2020'
...
---
_id: '8721'
abstract:
- lang: eng
text: Spontaneously arising channels that transport the phytohormone auxin provide
positional cues for self-organizing aspects of plant development such as flexible
vasculature regeneration or its patterning during leaf venation. The auxin canalization
hypothesis proposes a feedback between auxin signaling and transport as the underlying
mechanism, but molecular players await discovery. We identified part of the machinery
that routes auxin transport. The auxin-regulated receptor CAMEL (Canalization-related
Auxin-regulated Malectin-type RLK) together with CANAR (Canalization-related Receptor-like
kinase) interact with and phosphorylate PIN auxin transporters. camel and canar
mutants are impaired in PIN1 subcellular trafficking and auxin-mediated PIN polarization,
which macroscopically manifests as defects in leaf venation and vasculature regeneration
after wounding. The CAMEL-CANAR receptor complex is part of the auxin feedback
that coordinates polarization of individual cells during auxin canalization.
acknowledged_ssus:
- _id: Bio
- _id: LifeSc
acknowledgement: 'We acknowledge M. Glanc and Y. Zhang for providing entryclones;
Vienna Biocenter Core Facilities (VBCF) for recombinantprotein production and purification;
Vienna Biocenter Massspectrometry Facility, Bioimaging, and Life Science Facilities
at IST Austria and Proteomics Core Facility CEITEC for a great assistance.Funding:This
project received funding from the European Research Council (ERC) under the European
Union’s Horizon 2020 research and innovation program (grant agreement 742985) and
Austrian Science Fund (FWF): I 3630-B25 to J.F.and by grants from the Austrian Academy
of Science through the Gregor Mendel Institute (Y.B.) and the Austrian Agency for
International Cooperation in Education and Research (D.D.); the Netherlands Organization
for Scientific Research (NWO; VIDI-864.13.001) (W.S.); the Research Foundation–Flanders
(FWO;Odysseus II G0D0515N) and a European Research Council grant (ERC; StG TORPEDO;
714055) to B.D.R., B.Y., and E.M.; and the Hertha Firnberg Programme postdoctoral
fellowship (T-947) from the FWF Austrian Science Fund to E.S.-L.; J.H. is the recipient
of a DOC Fellowship of the Austrian Academy of Sciences at IST Austria.'
article_processing_charge: No
article_type: original
author:
- first_name: Jakub
full_name: Hajny, Jakub
id: 4800CC20-F248-11E8-B48F-1D18A9856A87
last_name: Hajny
orcid: 0000-0003-2140-7195
- first_name: Tomas
full_name: Prat, Tomas
id: 3DA3BFEE-F248-11E8-B48F-1D18A9856A87
last_name: Prat
- first_name: N
full_name: Rydza, N
last_name: Rydza
- first_name: Lesia
full_name: Rodriguez Solovey, Lesia
id: 3922B506-F248-11E8-B48F-1D18A9856A87
last_name: Rodriguez Solovey
orcid: 0000-0002-7244-7237
- first_name: Shutang
full_name: Tan, Shutang
id: 2DE75584-F248-11E8-B48F-1D18A9856A87
last_name: Tan
orcid: 0000-0002-0471-8285
- first_name: Inge
full_name: Verstraeten, Inge
id: 362BF7FE-F248-11E8-B48F-1D18A9856A87
last_name: Verstraeten
orcid: 0000-0001-7241-2328
- first_name: David
full_name: Domjan, David
id: C684CD7A-257E-11EA-9B6F-D8588B4F947F
last_name: Domjan
orcid: 0000-0003-2267-106X
- first_name: E
full_name: Mazur, E
last_name: Mazur
- first_name: E
full_name: Smakowska-Luzan, E
last_name: Smakowska-Luzan
- first_name: W
full_name: Smet, W
last_name: Smet
- first_name: E
full_name: Mor, E
last_name: Mor
- first_name: J
full_name: Nolf, J
last_name: Nolf
- first_name: B
full_name: Yang, B
last_name: Yang
- first_name: W
full_name: Grunewald, W
last_name: Grunewald
- first_name: Gergely
full_name: Molnar, Gergely
id: 34F1AF46-F248-11E8-B48F-1D18A9856A87
last_name: Molnar
- first_name: Y
full_name: Belkhadir, Y
last_name: Belkhadir
- first_name: B
full_name: De Rybel, B
last_name: De Rybel
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
citation:
ama: Hajny J, Prat T, Rydza N, et al. Receptor kinase module targets PIN-dependent
auxin transport during canalization. Science. 2020;370(6516):550-557. doi:10.1126/science.aba3178
apa: Hajny, J., Prat, T., Rydza, N., Rodriguez Solovey, L., Tan, S., Verstraeten,
I., … Friml, J. (2020). Receptor kinase module targets PIN-dependent auxin transport
during canalization. Science. American Association for the Advancement
of Science. https://doi.org/10.1126/science.aba3178
chicago: Hajny, Jakub, Tomas Prat, N Rydza, Lesia Rodriguez Solovey, Shutang Tan,
Inge Verstraeten, David Domjan, et al. “Receptor Kinase Module Targets PIN-Dependent
Auxin Transport during Canalization.” Science. American Association for
the Advancement of Science, 2020. https://doi.org/10.1126/science.aba3178.
ieee: J. Hajny et al., “Receptor kinase module targets PIN-dependent auxin
transport during canalization,” Science, vol. 370, no. 6516. American Association
for the Advancement of Science, pp. 550–557, 2020.
ista: Hajny J, Prat T, Rydza N, Rodriguez Solovey L, Tan S, Verstraeten I, Domjan
D, Mazur E, Smakowska-Luzan E, Smet W, Mor E, Nolf J, Yang B, Grunewald W, Molnar
G, Belkhadir Y, De Rybel B, Friml J. 2020. Receptor kinase module targets PIN-dependent
auxin transport during canalization. Science. 370(6516), 550–557.
mla: Hajny, Jakub, et al. “Receptor Kinase Module Targets PIN-Dependent Auxin Transport
during Canalization.” Science, vol. 370, no. 6516, American Association
for the Advancement of Science, 2020, pp. 550–57, doi:10.1126/science.aba3178.
short: J. Hajny, T. Prat, N. Rydza, L. Rodriguez Solovey, S. Tan, I. Verstraeten,
D. Domjan, E. Mazur, E. Smakowska-Luzan, W. Smet, E. Mor, J. Nolf, B. Yang, W.
Grunewald, G. Molnar, Y. Belkhadir, B. De Rybel, J. Friml, Science 370 (2020)
550–557.
date_created: 2020-11-02T10:04:46Z
date_published: 2020-10-30T00:00:00Z
date_updated: 2023-09-05T12:02:35Z
day: '30'
department:
- _id: JiFr
doi: 10.1126/science.aba3178
ec_funded: 1
external_id:
isi:
- '000583031800041'
pmid:
- '33122378'
intvolume: ' 370'
isi: 1
issue: '6516'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://europepmc.org/article/MED/33122378#free-full-text
month: '10'
oa: 1
oa_version: Published Version
page: 550-557
pmid: 1
project:
- _id: 261099A6-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '742985'
name: Tracing Evolution of Auxin Transport and Polarity in Plants
- _id: 26538374-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: I03630
name: Molecular mechanisms of endocytic cargo recognition in plants
- _id: 2699E3D2-B435-11E9-9278-68D0E5697425
grant_number: '25239'
name: Cell surface receptor complexes for PIN polarity and auxin-mediated development
publication: Science
publication_identifier:
eissn:
- 1095-9203
issn:
- 0036-8075
publication_status: published
publisher: American Association for the Advancement of Science
quality_controlled: '1'
related_material:
link:
- description: News on IST Homepage
relation: press_release
url: https://ist.ac.at/en/news/molecular-compass-for-cell-orientation/
scopus_import: '1'
status: public
title: Receptor kinase module targets PIN-dependent auxin transport during canalization
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 370
year: '2020'
...
---
_id: '449'
abstract:
- lang: eng
text: Auxin is unique among plant hormones due to its directional transport that
is mediated by the polarly distributed PIN auxin transporters at the plasma membrane.
The canalization hypothesis proposes that the auxin feedback on its polar flow
is a crucial, plant-specific mechanism mediating multiple self-organizing developmental
processes. Here, we used the auxin effect on the PIN polar localization in Arabidopsis
thaliana roots as a proxy for the auxin feedback on the PIN polarity during canalization.
We performed microarray experiments to find regulators of this process that act
downstream of auxin. We identified genes that were transcriptionally regulated
by auxin in an AXR3/IAA17- and ARF7/ARF19-dependent manner. Besides the known
components of the PIN polarity, such as PID and PIP5K kinases, a number of potential
new regulators were detected, among which the WRKY23 transcription factor, which
was characterized in more detail. Gain- and loss-of-function mutants confirmed
a role for WRKY23 in mediating the auxin effect on the PIN polarity. Accordingly,
processes requiring auxin-mediated PIN polarity rearrangements, such as vascular
tissue development during leaf venation, showed a higher WRKY23 expression and
required the WRKY23 activity. Our results provide initial insights into the auxin
transcriptional network acting upstream of PIN polarization and, potentially,
canalization-mediated plant development.
article_processing_charge: Yes
author:
- first_name: Tomas
full_name: Prat, Tomas
id: 3DA3BFEE-F248-11E8-B48F-1D18A9856A87
last_name: Prat
- first_name: Jakub
full_name: Hajny, Jakub
id: 4800CC20-F248-11E8-B48F-1D18A9856A87
last_name: Hajny
orcid: 0000-0003-2140-7195
- first_name: Wim
full_name: Grunewald, Wim
last_name: Grunewald
- first_name: Mina K
full_name: Vasileva, Mina K
id: 3407EB18-F248-11E8-B48F-1D18A9856A87
last_name: Vasileva
- first_name: Gergely
full_name: Molnar, Gergely
id: 34F1AF46-F248-11E8-B48F-1D18A9856A87
last_name: Molnar
- first_name: Ricardo
full_name: Tejos, Ricardo
last_name: Tejos
- first_name: Markus
full_name: Schmid, Markus
last_name: Schmid
- first_name: Michael
full_name: Sauer, Michael
last_name: Sauer
- first_name: Jirí
full_name: Friml, Jirí
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
citation:
ama: Prat T, Hajny J, Grunewald W, et al. WRKY23 is a component of the transcriptional
network mediating auxin feedback on PIN polarity. PLoS Genetics. 2018;14(1).
doi:10.1371/journal.pgen.1007177
apa: Prat, T., Hajny, J., Grunewald, W., Vasileva, M. K., Molnar, G., Tejos, R.,
… Friml, J. (2018). WRKY23 is a component of the transcriptional network mediating
auxin feedback on PIN polarity. PLoS Genetics. Public Library of Science.
https://doi.org/10.1371/journal.pgen.1007177
chicago: Prat, Tomas, Jakub Hajny, Wim Grunewald, Mina K Vasileva, Gergely Molnar,
Ricardo Tejos, Markus Schmid, Michael Sauer, and Jiří Friml. “WRKY23 Is a Component
of the Transcriptional Network Mediating Auxin Feedback on PIN Polarity.” PLoS
Genetics. Public Library of Science, 2018. https://doi.org/10.1371/journal.pgen.1007177.
ieee: T. Prat et al., “WRKY23 is a component of the transcriptional network
mediating auxin feedback on PIN polarity,” PLoS Genetics, vol. 14, no.
1. Public Library of Science, 2018.
ista: Prat T, Hajny J, Grunewald W, Vasileva MK, Molnar G, Tejos R, Schmid M, Sauer
M, Friml J. 2018. WRKY23 is a component of the transcriptional network mediating
auxin feedback on PIN polarity. PLoS Genetics. 14(1).
mla: Prat, Tomas, et al. “WRKY23 Is a Component of the Transcriptional Network Mediating
Auxin Feedback on PIN Polarity.” PLoS Genetics, vol. 14, no. 1, Public
Library of Science, 2018, doi:10.1371/journal.pgen.1007177.
short: T. Prat, J. Hajny, W. Grunewald, M.K. Vasileva, G. Molnar, R. Tejos, M. Schmid,
M. Sauer, J. Friml, PLoS Genetics 14 (2018).
date_created: 2018-12-11T11:46:32Z
date_published: 2018-01-29T00:00:00Z
date_updated: 2025-05-07T11:12:28Z
day: '29'
ddc:
- '581'
department:
- _id: JiFr
doi: 10.1371/journal.pgen.1007177
ec_funded: 1
external_id:
isi:
- '000423718600034'
file:
- access_level: open_access
checksum: 0276d66788ec076f4924164a39e6a712
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:10:52Z
date_updated: 2020-07-14T12:46:30Z
file_id: '4843'
file_name: IST-2018-967-v1+1_journal.pgen.1007177.pdf
file_size: 24709062
relation: main_file
file_date_updated: 2020-07-14T12:46:30Z
has_accepted_license: '1'
intvolume: ' 14'
isi: 1
issue: '1'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Published Version
project:
- _id: 25716A02-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '282300'
name: Polarity and subcellular dynamics in plants
publication: PLoS Genetics
publication_status: published
publisher: Public Library of Science
publist_id: '7373'
pubrep_id: '967'
quality_controlled: '1'
related_material:
record:
- id: '1127'
relation: dissertation_contains
status: public
- id: '7172'
relation: dissertation_contains
status: public
- id: '8822'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: WRKY23 is a component of the transcriptional network mediating auxin feedback
on PIN polarity
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: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 14
year: '2018'
...
---
_id: '1127'
abstract:
- lang: eng
text: "Plant hormone auxin and its transport between cells belong to the most important\r\nmechanisms
controlling plant development. Auxin itself could change localization of PINs
and\r\nthereby control direction of its own flow. We performed an expression profiling
experiment\r\nin Arabidopsis roots to identify potential regulators of PIN polarity
which are transcriptionally\r\nregulated by auxin signalling. We identified several
novel regulators and performed a detailed\r\ncharacterization of the transcription
factor WRKY23 (At2g47260) and its role in auxin\r\nfeedback on PIN polarity. Gain-of-function
and dominant-negative mutants revealed that\r\nWRKY23 plays a crucial role in
mediating the auxin effect on PIN polarity. In concordance,\r\ntypical polar auxin
transport processes such as gravitropism and leaf vascular pattern\r\nformation
were disturbed by interfering with WRKY23 function.\r\nIn order to identify direct
targets of WRKY23, we performed consequential expression\r\nprofiling experiments
using a WRKY23 inducible gain-of-function line and dominant-negative\r\nWRKY23
line that is defunct in PIN re-arrangement. Among several genes mostly related
to\r\nthe groups of cell wall and defense process regulators, we identified LYSINE-HISTIDINE\r\nTRANSPORTER
1 (LHT1; At5g40780), a small amino acid permease gene from the amino\r\nacid/auxin
permease family (AAAP), we present its detailed characterisation in auxin feedback\r\non
PIN repolarization, identified its transcriptional regulation, we propose a potential\r\nmechanism
of its action. Moreover, we identified also a member of receptor-like protein\r\nkinase
LRR-RLK (LEUCINE-RICH REPEAT TRANSMEMBRANE PROTEIN KINASE PROTEIN 1;\r\nLRRK1;
At1g05700), which also affects auxin-dependent PIN re-arrangement. We described\r\nits
transcriptional behaviour, subcellular localization. Based on global expression
data, we\r\ntried to identify ligand responsible for mechanism of signalling and
suggest signalling partner\r\nand interactors. Additionally, we described role
of novel phytohormone group, strigolactone,\r\nin auxin-dependent PIN re-arrangement,
that could be a fundament for future studies in this\r\nfield.\r\nOur results
provide first insights into an auxin transcriptional network targeting PIN\r\nlocalization
and thus regulating plant development. We highlighted WRKY23 transcriptional\r\nnetwork
and characterised its mediatory role in plant development. We identified direct\r\neffectors
of this network, LHT1 and LRRK1, and describe their roles in PIN re-arrangement
and\r\nPIN-dependent auxin transport processes."
acknowledgement: I would like to first acknowledge my supervisor Jiří Friml for support,
kind advice and patience. It was a pleasure to be a part of your lab, Jiří. I will
remember the atmosphere present in auxin lab at VIB in Ghent and at IST in Klosterneuburg
forever. I would like to thank all past and present lab members for the friendship
and friendly and scientific environment in the groups. It was so nice to cooperate
with you, guys. There was always someone who helped me with experiments, troubleshoot
issues coming from our work etc. At this place, I would like to thank especially
to Gergo Molnár. I’m happy (and lucky) that I have met him; he naturally became
my tutor and guide through my PhD. From no one else during my entire professional
career, I’ve learned that much.
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Tomas
full_name: Prat, Tomas
id: 3DA3BFEE-F248-11E8-B48F-1D18A9856A87
last_name: Prat
citation:
ama: Prat T. Identification of novel regulators of PIN polarity and development
of novel auxin sensor. 2017.
apa: Prat, T. (2017). Identification of novel regulators of PIN polarity and
development of novel auxin sensor. Institute of Science and Technology Austria.
chicago: Prat, Tomas. “Identification of Novel Regulators of PIN Polarity and Development
of Novel Auxin Sensor.” Institute of Science and Technology Austria, 2017.
ieee: T. Prat, “Identification of novel regulators of PIN polarity and development
of novel auxin sensor,” Institute of Science and Technology Austria, 2017.
ista: Prat T. 2017. Identification of novel regulators of PIN polarity and development
of novel auxin sensor. Institute of Science and Technology Austria.
mla: Prat, Tomas. Identification of Novel Regulators of PIN Polarity and Development
of Novel Auxin Sensor. Institute of Science and Technology Austria, 2017.
short: T. Prat, Identification of Novel Regulators of PIN Polarity and Development
of Novel Auxin Sensor, Institute of Science and Technology Austria, 2017.
date_created: 2018-12-11T11:50:17Z
date_published: 2017-01-12T00:00:00Z
date_updated: 2025-05-07T11:12:27Z
day: '12'
ddc:
- '580'
degree_awarded: PhD
department:
- _id: JiFr
file:
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file_size: 10285946
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checksum: bab18b52cf98145926042d8ed99fdb3b
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creator: dernst
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success: 1
file_date_updated: 2021-02-22T11:52:56Z
has_accepted_license: '1'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Published Version
page: '131'
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
publist_id: '6233'
related_material:
record:
- id: '449'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
title: Identification of novel regulators of PIN polarity and development of novel
auxin sensor
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2017'
...
---
_id: '1372'
abstract:
- lang: eng
text: Redirection of intercellular auxin fluxes via relocalization of the PIN-FORMED
3 (PIN3) and PIN7 auxin efflux carriers has been suggested to be necessary for
the root gravitropic response. Cytokinins have also been proposed to play a role
in controlling root gravitropism, but conclusive evidence is lacking. We present
a detailed study of the dynamics of root bending early after gravistimulation,
which revealed a delayed gravitropic response in transgenic lines with depleted
endogenous cytokinins (Pro35S:AtCKX) and cytokinin signaling mutants. Pro35S:AtCKX
lines, as well as a cytokinin receptor mutant ahk3, showed aberrations in the
auxin response distribution in columella cells consistent with defects in the
auxin transport machinery. Using in vivo real-time imaging of PIN3-GFP and PIN7-GFP
in AtCKX3 overexpression and ahk3 backgrounds, we observed wild-type-like relocalization
of PIN proteins in the columella early after gravistimulation, with gravity-induced
relocalization of PIN7 faster than that of PIN3. Nonetheless, the cellular distribution
of PIN3 and PIN7 and expression of PIN7 and the auxin influx carrier AUX1 was
affected in AtCKX overexpression lines. Based on the retained cytokinin sensitivity
in pin3 pin4 pin7 mutant, we propose the AUX1-mediated auxin transport rather
than columella-located PIN proteins as a target of endogenous cytokinins in the
control of root gravitropism.
acknowledgement: 'Funded by Ministry of Education, Youth and Sports Czech Republic.
Grant Numbers: CEITEC 2020, LQ1601, LO1204, LH14104 and The European Research Council.
Grant Number: ERC-2011-StG-20101109-PSDP and The Czech Science Foundation. Grant
Numbers: GAP501/11/1150, GA13-40637S, GP14-30004P'
author:
- first_name: Markéta
full_name: Pernisová, Markéta
last_name: Pernisová
- first_name: Tomas
full_name: Prat, Tomas
id: 3DA3BFEE-F248-11E8-B48F-1D18A9856A87
last_name: Prat
- first_name: Peter
full_name: Grones, Peter
id: 399876EC-F248-11E8-B48F-1D18A9856A87
last_name: Grones
- first_name: Danka
full_name: Haruštiaková, Danka
last_name: Haruštiaková
- first_name: Martina
full_name: Matonohova, Martina
last_name: Matonohova
- first_name: Lukáš
full_name: Spíchal, Lukáš
last_name: Spíchal
- first_name: Tomasz
full_name: Nodzyński, Tomasz
last_name: Nodzyński
- first_name: Jirí
full_name: Friml, Jirí
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Jan
full_name: Hejátko, Jan
last_name: Hejátko
citation:
ama: Pernisová M, Prat T, Grones P, et al. Cytokinins influence root gravitropism
via differential regulation of auxin transporter expression and localization in
Arabidopsis. New Phytologist. 2016;212(2):497-509. doi:10.1111/nph.14049
apa: Pernisová, M., Prat, T., Grones, P., Haruštiaková, D., Matonohova, M., Spíchal,
L., … Hejátko, J. (2016). Cytokinins influence root gravitropism via differential
regulation of auxin transporter expression and localization in Arabidopsis. New
Phytologist. Wiley-Blackwell. https://doi.org/10.1111/nph.14049
chicago: Pernisová, Markéta, Tomas Prat, Peter Grones, Danka Haruštiaková, Martina
Matonohova, Lukáš Spíchal, Tomasz Nodzyński, Jiří Friml, and Jan Hejátko. “Cytokinins
Influence Root Gravitropism via Differential Regulation of Auxin Transporter Expression
and Localization in Arabidopsis.” New Phytologist. Wiley-Blackwell, 2016.
https://doi.org/10.1111/nph.14049.
ieee: M. Pernisová et al., “Cytokinins influence root gravitropism via differential
regulation of auxin transporter expression and localization in Arabidopsis,” New
Phytologist, vol. 212, no. 2. Wiley-Blackwell, pp. 497–509, 2016.
ista: Pernisová M, Prat T, Grones P, Haruštiaková D, Matonohova M, Spíchal L, Nodzyński
T, Friml J, Hejátko J. 2016. Cytokinins influence root gravitropism via differential
regulation of auxin transporter expression and localization in Arabidopsis. New
Phytologist. 212(2), 497–509.
mla: Pernisová, Markéta, et al. “Cytokinins Influence Root Gravitropism via Differential
Regulation of Auxin Transporter Expression and Localization in Arabidopsis.” New
Phytologist, vol. 212, no. 2, Wiley-Blackwell, 2016, pp. 497–509, doi:10.1111/nph.14049.
short: M. Pernisová, T. Prat, P. Grones, D. Haruštiaková, M. Matonohova, L. Spíchal,
T. Nodzyński, J. Friml, J. Hejátko, New Phytologist 212 (2016) 497–509.
date_created: 2018-12-11T11:51:38Z
date_published: 2016-10-01T00:00:00Z
date_updated: 2021-01-12T06:50:13Z
day: '01'
ddc:
- '581'
department:
- _id: JiFr
doi: 10.1111/nph.14049
file:
- access_level: open_access
checksum: 27fd841ceaf0403559d7048ef51500f9
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:14:53Z
date_updated: 2020-07-14T12:44:47Z
file_id: '5108'
file_name: IST-2018-1006-v1+1_Pernisova_NewPhytol_2016_peer_review.pdf
file_size: 972763
relation: main_file
file_date_updated: 2020-07-14T12:44:47Z
has_accepted_license: '1'
intvolume: ' 212'
issue: '2'
language:
- iso: eng
month: '10'
oa: 1
oa_version: Submitted Version
page: 497 - 509
publication: New Phytologist
publication_status: published
publisher: Wiley-Blackwell
publist_id: '5839'
pubrep_id: '1006'
quality_controlled: '1'
scopus_import: 1
status: public
title: Cytokinins influence root gravitropism via differential regulation of auxin
transporter expression and localization in Arabidopsis
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 212
year: '2016'
...
---
_id: '1996'
abstract:
- lang: eng
text: Auxin polar transport, local maxima, and gradients have become an importantmodel
system for studying self-organization. Auxin distribution is regulated by auxin-dependent
positive feedback loops that are not well-understood at the molecular level. Previously,
we showed the involvement of the RHO of Plants (ROP) effector INTERACTOR of CONSTITUTIVELY
active ROP 1 (ICR1) in regulation of auxin transport and that ICR1 levels are
posttranscriptionally repressed at the site of maximum auxin accumulation at the
root tip. Here, we show that bimodal regulation of ICR1 levels by auxin is essential
for regulating formation of auxin local maxima and gradients. ICR1 levels increase
concomitant with increase in auxin response in lateral root primordia, cotyledon
tips, and provascular tissues. However, in the embryo hypophysis and root meristem,
when auxin exceeds critical levels, ICR1 is rapidly destabilized by an SCF(TIR1/AFB)
[SKP, Cullin, F-box (transport inhibitor response 1/auxin signaling F-box protein)]-dependent
auxin signaling mechanism. Furthermore, ectopic expression of ICR1 in the embryo
hypophysis resulted in reduction of auxin accumulation and concomitant root growth
arrest. ICR1 disappeared during root regeneration and lateral root initiation
concomitantly with the formation of a local auxin maximum in response to external
auxin treatments and transiently after gravitropic stimulation. Destabilization
of ICR1 was impaired after inhibition of auxin transport and signaling, proteasome
function, and protein synthesis. A mathematical model based on these findings
shows that an in vivo-like auxin distribution, rootward auxin flux, and shootward
reflux can be simulated without assuming preexisting tissue polarity. Our experimental
results and mathematical modeling indicate that regulation of auxin distribution
is tightly associated with auxin-dependent ICR1 levels.
author:
- first_name: Ora
full_name: Hazak, Ora
last_name: Hazak
- first_name: Uri
full_name: Obolski, Uri
last_name: Obolski
- first_name: Tomas
full_name: Prat, Tomas
id: 3DA3BFEE-F248-11E8-B48F-1D18A9856A87
last_name: Prat
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Lilach
full_name: Hadany, Lilach
last_name: Hadany
- first_name: Shaul
full_name: Yalovsky, Shaul
last_name: Yalovsky
citation:
ama: Hazak O, Obolski U, Prat T, Friml J, Hadany L, Yalovsky S. Bimodal regulation
of ICR1 levels generates self-organizing auxin distribution. PNAS. 2014;111(50):E5471-E5479.
doi:10.1073/pnas.1413918111
apa: Hazak, O., Obolski, U., Prat, T., Friml, J., Hadany, L., & Yalovsky, S.
(2014). Bimodal regulation of ICR1 levels generates self-organizing auxin distribution.
PNAS. National Academy of Sciences. https://doi.org/10.1073/pnas.1413918111
chicago: Hazak, Ora, Uri Obolski, Tomas Prat, Jiří Friml, Lilach Hadany, and Shaul
Yalovsky. “Bimodal Regulation of ICR1 Levels Generates Self-Organizing Auxin Distribution.”
PNAS. National Academy of Sciences, 2014. https://doi.org/10.1073/pnas.1413918111.
ieee: O. Hazak, U. Obolski, T. Prat, J. Friml, L. Hadany, and S. Yalovsky, “Bimodal
regulation of ICR1 levels generates self-organizing auxin distribution,” PNAS,
vol. 111, no. 50. National Academy of Sciences, pp. E5471–E5479, 2014.
ista: Hazak O, Obolski U, Prat T, Friml J, Hadany L, Yalovsky S. 2014. Bimodal regulation
of ICR1 levels generates self-organizing auxin distribution. PNAS. 111(50), E5471–E5479.
mla: Hazak, Ora, et al. “Bimodal Regulation of ICR1 Levels Generates Self-Organizing
Auxin Distribution.” PNAS, vol. 111, no. 50, National Academy of Sciences,
2014, pp. E5471–79, doi:10.1073/pnas.1413918111.
short: O. Hazak, U. Obolski, T. Prat, J. Friml, L. Hadany, S. Yalovsky, PNAS 111
(2014) E5471–E5479.
date_created: 2018-12-11T11:55:07Z
date_published: 2014-12-16T00:00:00Z
date_updated: 2021-01-12T06:54:35Z
day: '16'
department:
- _id: JiFr
doi: 10.1073/pnas.1413918111
intvolume: ' 111'
issue: '50'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4273421/
month: '12'
oa: 1
oa_version: Submitted Version
page: E5471 - E5479
publication: PNAS
publication_status: published
publisher: National Academy of Sciences
publist_id: '5083'
quality_controlled: '1'
scopus_import: 1
status: public
title: Bimodal regulation of ICR1 levels generates self-organizing auxin distribution
type: journal_article
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 111
year: '2014'
...