---
_id: '938'
abstract:
- lang: eng
text: The thesis encompasses several topics of plant cell biology which were studied
in the model plant Arabidopsis thaliana. Chapter 1 concerns the plant hormone
auxin and its polar transport through cells and tissues. The highly controlled,
directional transport of auxin is facilitated by plasma membrane-localized transporters.
Transporters from the PIN family direct auxin transport due to their polarized
localizations at cell membranes. Substantial effort has been put into research
on cellular trafficking of PIN proteins, which is thought to underlie their polar
distribution. I participated in a forward genetic screen aimed at identifying
novel regulators of PIN polarity. The screen yielded several genes which may be
involved in PIN polarity regulation or participate in polar auxin transport by
other means. Chapter 2 focuses on the endomembrane system, with particular attention
to clathrin-mediated endocytosis. The project started with identification of several
proteins that interact with clathrin light chains. Among them, I focused on two
putative homologues of auxilin, which in non-plant systems is an endocytotic factor
known for uncoating clathrin-coated vesicles in the final step of endocytosis.
The body of my work consisted of an in-depth characterization of transgenic A.
thaliana lines overexpressing these putative auxilins in an inducible manner.
Overexpression of these proteins leads to an inhibition of endocytosis, as documented
by imaging of cargoes and clathrin-related endocytic machinery. An extension of
this work is an investigation into a concept of homeostatic regulation acting
between distinct transport processes in the endomembrane system. With auxilin
overexpressing lines, where endocytosis is blocked specifically, I made observations
on the mutual relationship between two opposite trafficking processes of secretion
and endocytosis. In Chapter 3, I analyze cortical microtubule arrays and their
relationship to auxin signaling and polarized growth in elongating cells. In plants,
microtubules are organized into arrays just below the plasma membrane, and it
is thought that their function is to guide membrane-docked cellulose synthase
complexes. These, in turn, influence cell wall structure and cell shape by directed
deposition of cellulose fibres. In elongating cells, cortical microtubule arrays
are able to reorient in relation to long cell axis, and these reorientations have
been linked to cell growth and to signaling of growth-regulating factors such
as auxin or light. In this chapter, I am addressing the causal relationship between
microtubule array reorientation, growth, and auxin signaling. I arrive at a model
where array reorientation is not guided by auxin directly, but instead is only
controlled by growth, which, in turn, is regulated by auxin.
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Maciek
full_name: Adamowski, Maciek
id: 45F536D2-F248-11E8-B48F-1D18A9856A87
last_name: Adamowski
orcid: 0000-0001-6463-5257
citation:
ama: Adamowski M. Investigations into cell polarity and trafficking in the plant
model Arabidopsis thaliana . 2017. doi:10.15479/AT:ISTA:th_842
apa: Adamowski, M. (2017). Investigations into cell polarity and trafficking
in the plant model Arabidopsis thaliana . Institute of Science and Technology
Austria. https://doi.org/10.15479/AT:ISTA:th_842
chicago: Adamowski, Maciek. “Investigations into Cell Polarity and Trafficking in
the Plant Model Arabidopsis Thaliana .” Institute of Science and Technology Austria,
2017. https://doi.org/10.15479/AT:ISTA:th_842.
ieee: M. Adamowski, “Investigations into cell polarity and trafficking in the plant
model Arabidopsis thaliana ,” Institute of Science and Technology Austria, 2017.
ista: Adamowski M. 2017. Investigations into cell polarity and trafficking in the
plant model Arabidopsis thaliana . Institute of Science and Technology Austria.
mla: Adamowski, Maciek. Investigations into Cell Polarity and Trafficking in
the Plant Model Arabidopsis Thaliana . Institute of Science and Technology
Austria, 2017, doi:10.15479/AT:ISTA:th_842.
short: M. Adamowski, Investigations into Cell Polarity and Trafficking in the Plant
Model Arabidopsis Thaliana , Institute of Science and Technology Austria, 2017.
date_created: 2018-12-11T11:49:18Z
date_published: 2017-06-02T00:00:00Z
date_updated: 2023-09-07T12:06:09Z
day: '02'
ddc:
- '581'
- '583'
- '580'
degree_awarded: PhD
department:
- _id: JiFr
doi: 10.15479/AT:ISTA:th_842
file:
- access_level: closed
checksum: 193425764d9aaaed3ac57062a867b315
content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
creator: dernst
date_created: 2019-04-05T09:03:20Z
date_updated: 2020-07-14T12:48:15Z
file_id: '6215'
file_name: 2017_Adamowski-Thesis_Source.docx
file_size: 46903863
relation: source_file
- access_level: open_access
checksum: df5ab01be81f821e1b958596a1ec8d21
content_type: application/pdf
creator: dernst
date_created: 2019-04-05T09:03:19Z
date_updated: 2020-07-14T12:48:15Z
file_id: '6216'
file_name: 2017_Adamowski-Thesis.pdf
file_size: 8698888
relation: main_file
file_date_updated: 2020-07-14T12:48:15Z
has_accepted_license: '1'
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
page: '117'
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
publist_id: '6483'
pubrep_id: '842'
related_material:
record:
- id: '1591'
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: 'Investigations into cell polarity and trafficking in the plant model Arabidopsis
thaliana '
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2017'
...
---
_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: 2023-09-19T10:39:33Z
day: '12'
ddc:
- '580'
degree_awarded: PhD
department:
- _id: JiFr
file:
- access_level: closed
checksum: d192c7c6c5ea32c8432437286dc4909e
content_type: application/pdf
creator: dernst
date_created: 2019-04-05T08:45:14Z
date_updated: 2019-04-05T08:45:14Z
file_id: '6209'
file_name: IST_Austria_Thesis_Tomáš_Prát.pdf
file_size: 10285946
relation: main_file
- access_level: open_access
checksum: bab18b52cf98145926042d8ed99fdb3b
content_type: application/pdf
creator: dernst
date_created: 2021-02-22T11:52:56Z
date_updated: 2021-02-22T11:52:56Z
file_id: '9185'
file_name: 2017_Thesis_Prat.pdf
file_size: 9802991
relation: main_file
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: '1159'
abstract:
- lang: eng
text: Auxin steers numerous physiological processes in plants, making the tight
control of its endogenous levels and spatiotemporal distribution a necessity.
This regulation is achieved by different mechanisms, including auxin biosynthesis,
metabolic conversions, degradation, and transport. Here, we introduce cis-cinnamic
acid (c-CA) as a novel and unique addition to a small group of endogenous molecules
affecting in planta auxin concentrations. c-CA is the photo-isomerization product
of the phenylpropanoid pathway intermediate trans-CA (t-CA). When grown on c-CA-containing
medium, an evolutionary diverse set of plant species were shown to exhibit phenotypes
characteristic for high auxin levels, including inhibition of primary root growth,
induction of root hairs, and promotion of adventitious and lateral rooting. By
molecular docking and receptor binding assays, we showed that c-CA itself is neither
an auxin nor an anti-auxin, and auxin profiling data revealed that c-CA does not
significantly interfere with auxin biosynthesis. Single cell-based auxin accumulation
assays showed that c-CA, and not t-CA, is a potent inhibitor of auxin efflux.
Auxin signaling reporters detected changes in spatiotemporal distribution of the
auxin response along the root of c-CA-treated plants, and long-distance auxin
transport assays showed no inhibition of rootward auxin transport. Overall, these
results suggest that the phenotypes of c-CA-treated plants are the consequence
of a local change in auxin accumulation, induced by the inhibition of auxin efflux.
This work reveals a novel mechanism how plants may regulate auxin levels and adds
a novel, naturally occurring molecule to the chemical toolbox for the studies
of auxin homeostasis.
article_processing_charge: No
article_type: original
author:
- first_name: Ward
full_name: Steenackers, Ward
last_name: Steenackers
- first_name: Petr
full_name: Klíma, Petr
last_name: Klíma
- first_name: Mussa
full_name: Quareshy, Mussa
last_name: Quareshy
- first_name: Igor
full_name: Cesarino, Igor
last_name: Cesarino
- first_name: Robert
full_name: Kumpf, Robert
last_name: Kumpf
- first_name: Sander
full_name: Corneillie, Sander
last_name: Corneillie
- first_name: Pedro
full_name: Araújo, Pedro
last_name: Araújo
- first_name: Tom
full_name: Viaene, Tom
last_name: Viaene
- first_name: Geert
full_name: Goeminne, Geert
last_name: Goeminne
- first_name: Moritz
full_name: Nowack, Moritz
last_name: Nowack
- first_name: Karin
full_name: Ljung, Karin
last_name: Ljung
- first_name: Jirí
full_name: Friml, Jirí
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Joshua
full_name: Blakeslee, Joshua
last_name: Blakeslee
- first_name: Ondřej
full_name: Novák, Ondřej
last_name: Novák
- first_name: Eva
full_name: Zažímalová, Eva
last_name: Zažímalová
- first_name: Richard
full_name: Napier, Richard
last_name: Napier
- first_name: Wout
full_name: Boerjan, Wout
last_name: Boerjan
- first_name: Bartel
full_name: Vanholme, Bartel
last_name: Vanholme
citation:
ama: Steenackers W, Klíma P, Quareshy M, et al. Cis-cinnamic acid is a novel natural
auxin efflux inhibitor that promotes lateral root formation. Plant Physiology.
2017;173(1):552-565. doi:10.1104/pp.16.00943
apa: Steenackers, W., Klíma, P., Quareshy, M., Cesarino, I., Kumpf, R., Corneillie,
S., … Vanholme, B. (2017). Cis-cinnamic acid is a novel natural auxin efflux inhibitor
that promotes lateral root formation. Plant Physiology. American Society
of Plant Biologists. https://doi.org/10.1104/pp.16.00943
chicago: Steenackers, Ward, Petr Klíma, Mussa Quareshy, Igor Cesarino, Robert Kumpf,
Sander Corneillie, Pedro Araújo, et al. “Cis-Cinnamic Acid Is a Novel Natural
Auxin Efflux Inhibitor That Promotes Lateral Root Formation.” Plant Physiology.
American Society of Plant Biologists, 2017. https://doi.org/10.1104/pp.16.00943.
ieee: W. Steenackers et al., “Cis-cinnamic acid is a novel natural auxin
efflux inhibitor that promotes lateral root formation,” Plant Physiology,
vol. 173, no. 1. American Society of Plant Biologists, pp. 552–565, 2017.
ista: Steenackers W, Klíma P, Quareshy M, Cesarino I, Kumpf R, Corneillie S, Araújo
P, Viaene T, Goeminne G, Nowack M, Ljung K, Friml J, Blakeslee J, Novák O, Zažímalová
E, Napier R, Boerjan W, Vanholme B. 2017. Cis-cinnamic acid is a novel natural
auxin efflux inhibitor that promotes lateral root formation. Plant Physiology.
173(1), 552–565.
mla: Steenackers, Ward, et al. “Cis-Cinnamic Acid Is a Novel Natural Auxin Efflux
Inhibitor That Promotes Lateral Root Formation.” Plant Physiology, vol.
173, no. 1, American Society of Plant Biologists, 2017, pp. 552–65, doi:10.1104/pp.16.00943.
short: W. Steenackers, P. Klíma, M. Quareshy, I. Cesarino, R. Kumpf, S. Corneillie,
P. Araújo, T. Viaene, G. Goeminne, M. Nowack, K. Ljung, J. Friml, J. Blakeslee,
O. Novák, E. Zažímalová, R. Napier, W. Boerjan, B. Vanholme, Plant Physiology
173 (2017) 552–565.
date_created: 2018-12-11T11:50:28Z
date_published: 2017-01-01T00:00:00Z
date_updated: 2023-09-20T11:29:17Z
day: '01'
ddc:
- '580'
department:
- _id: JiFr
doi: 10.1104/pp.16.00943
ec_funded: 1
external_id:
isi:
- '000394135800041'
pmid:
- '27837086'
file:
- access_level: open_access
checksum: fd4d1cfe7ed70e54bb12ae3881f3fb91
content_type: application/pdf
creator: dernst
date_created: 2019-11-18T16:12:25Z
date_updated: 2020-07-14T12:44:36Z
file_id: '7040'
file_name: 2016_PlantPhysi_Steenackers.pdf
file_size: 4109142
relation: main_file
file_date_updated: 2020-07-14T12:44:36Z
has_accepted_license: '1'
intvolume: ' 173'
isi: 1
issue: '1'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Submitted Version
page: 552 - 565
pmid: 1
project:
- _id: 25716A02-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '282300'
name: Polarity and subcellular dynamics in plants
publication: Plant Physiology
publication_identifier:
issn:
- 0032-0889
publication_status: published
publisher: American Society of Plant Biologists
publist_id: '6199'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Cis-cinnamic acid is a novel natural auxin efflux inhibitor that promotes lateral
root formation
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 173
year: '2017'
...
---
_id: '1110'
abstract:
- lang: eng
text: The phytohormone auxin is a major determinant and regulatory component important
for plant development. Auxin transport between cells is mediated by a complex
system of transporters such as AUX1/LAX, PIN, and ABCB proteins, and their localization
and activity is thought to be influenced by phosphatases and kinases. Flavonols
have been shown to alter auxin transport activity and changes in flavonol accumulation
in the Arabidopsis thaliana rol1-2 mutant cause defects in auxin transport and
seedling development. A new mutation in ROOTS CURL IN NPA 1 (RCN1), encoding a
regulatory subunit of the phosphatase PP2A, was found to suppress the growth defects
of rol1-2 without changing the flavonol content. rol1-2 rcn1-3 double mutants
show wild type-like auxin transport activity while levels of free auxin are not
affected by rcn1-3. In the rol1-2 mutant, PIN2 shows a flavonol-induced basal-to-apical
shift in polar localization which is reversed in the rol1-2 rcn1-3 to basal localization.
In vivo analysis of PINOID action, a kinase known to influence PIN protein localization
in a PP2A-antagonistic manner, revealed a negative impact of flavonols on PINOID
activity. Together, these data suggest that flavonols affect auxin transport by
modifying the antagonistic kinase/phosphatase equilibrium.
acknowledgement: European Research Council (project ERC-2011-StG-20101109-PSDP), European
Social Fund (CZ.1.07/2.3.00/20.0043) and the Czech Science Foundation (GA13-40637S)
[JF].
article_number: '41906'
article_processing_charge: No
author:
- first_name: Benjamin
full_name: Kuhn, Benjamin
last_name: Kuhn
- first_name: Tomasz
full_name: Nodzyński, Tomasz
last_name: Nodzyński
- first_name: Sanae
full_name: Errafi, Sanae
last_name: Errafi
- first_name: Rahel
full_name: Bucher, Rahel
last_name: Bucher
- first_name: Shibu
full_name: Gupta, Shibu
last_name: Gupta
- first_name: Bibek
full_name: Aryal, Bibek
last_name: Aryal
- first_name: Petre
full_name: Dobrev, Petre
last_name: Dobrev
- first_name: Laurent
full_name: Bigler, Laurent
last_name: Bigler
- first_name: Markus
full_name: Geisler, Markus
last_name: Geisler
- first_name: Eva
full_name: Zažímalová, Eva
last_name: Zažímalová
- first_name: Jirí
full_name: Friml, Jirí
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Christoph
full_name: Ringli, Christoph
last_name: Ringli
citation:
ama: Kuhn B, Nodzyński T, Errafi S, et al. Flavonol-induced changes in PIN2 polarity
and auxin transport in the Arabidopsis thaliana rol1-2 mutant require phosphatase
activity. Scientific Reports. 2017;7. doi:10.1038/srep41906
apa: Kuhn, B., Nodzyński, T., Errafi, S., Bucher, R., Gupta, S., Aryal, B., … Ringli,
C. (2017). Flavonol-induced changes in PIN2 polarity and auxin transport in the
Arabidopsis thaliana rol1-2 mutant require phosphatase activity. Scientific
Reports. Nature Publishing Group. https://doi.org/10.1038/srep41906
chicago: Kuhn, Benjamin, Tomasz Nodzyński, Sanae Errafi, Rahel Bucher, Shibu Gupta,
Bibek Aryal, Petre Dobrev, et al. “Flavonol-Induced Changes in PIN2 Polarity and
Auxin Transport in the Arabidopsis Thaliana Rol1-2 Mutant Require Phosphatase
Activity.” Scientific Reports. Nature Publishing Group, 2017. https://doi.org/10.1038/srep41906.
ieee: B. Kuhn et al., “Flavonol-induced changes in PIN2 polarity and auxin
transport in the Arabidopsis thaliana rol1-2 mutant require phosphatase activity,”
Scientific Reports, vol. 7. Nature Publishing Group, 2017.
ista: Kuhn B, Nodzyński T, Errafi S, Bucher R, Gupta S, Aryal B, Dobrev P, Bigler
L, Geisler M, Zažímalová E, Friml J, Ringli C. 2017. Flavonol-induced changes
in PIN2 polarity and auxin transport in the Arabidopsis thaliana rol1-2 mutant
require phosphatase activity. Scientific Reports. 7, 41906.
mla: Kuhn, Benjamin, et al. “Flavonol-Induced Changes in PIN2 Polarity and Auxin
Transport in the Arabidopsis Thaliana Rol1-2 Mutant Require Phosphatase Activity.”
Scientific Reports, vol. 7, 41906, Nature Publishing Group, 2017, doi:10.1038/srep41906.
short: B. Kuhn, T. Nodzyński, S. Errafi, R. Bucher, S. Gupta, B. Aryal, P. Dobrev,
L. Bigler, M. Geisler, E. Zažímalová, J. Friml, C. Ringli, Scientific Reports
7 (2017).
date_created: 2018-12-11T11:50:12Z
date_published: 2017-02-06T00:00:00Z
date_updated: 2023-09-20T11:35:35Z
day: '06'
ddc:
- '581'
department:
- _id: JiFr
doi: 10.1038/srep41906
ec_funded: 1
external_id:
isi:
- '000393367600001'
file:
- access_level: open_access
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:18:09Z
date_updated: 2018-12-12T10:18:09Z
file_id: '5328'
file_name: IST-2017-803-v1+1_srep41906.pdf
file_size: 1654496
relation: main_file
file_date_updated: 2018-12-12T10:18:09Z
has_accepted_license: '1'
intvolume: ' 7'
isi: 1
language:
- iso: eng
month: '02'
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: Scientific Reports
publication_identifier:
issn:
- '20452322'
publication_status: published
publisher: Nature Publishing Group
publist_id: '6258'
pubrep_id: '803'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Flavonol-induced changes in PIN2 polarity and auxin transport in the Arabidopsis
thaliana rol1-2 mutant require phosphatase activity
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: 7
year: '2017'
...
---
_id: '799'
abstract:
- lang: eng
text: Membrane traffic at the trans-Golgi network (TGN) is crucial for correctly
distributing various membrane proteins to their destination. Polarly localized
auxin efflux proteins, including PIN-FORMED1 (PIN1), are dynamically transported
between the endosomes and the plasma membrane (PM) in the plant cells. The intracellular
trafficking of PIN1 protein is sensitive to a fungal toxin brefeldin A (BFA),
which is known to inhibit guanine-nucleotide exchange factors for ADP ribosylation
factors (ARF GEFs) such as GNOM. However, the molecular details of the BFA-sensitive
trafficking pathway have not been revealed fully. In a previous study, we have
identified an Arabidopsis mutant BFA-visualized endocytic trafficking defective
3 (ben3) which exhibited reduced sensitivity to BFA in terms of BFA-induced intracellular
PIN1 agglomeration. Here, we show that BEN3 encodes a member of BIG family ARF
GEFs, BIG2. Fluorescent proteins tagged BEN3/BIG2 co-localized with markers for
TGN / early endosome (EE). Inspection of conditionally induced de novo synthesized
PIN1 confirmed that its secretion to the PM is BFA-sensitive and established BEN3/BIG2
as a crucial component of this BFA action at the level of TGN/EE. Furthermore,
ben3 mutation alleviated BFA-induced agglomeration of another TGN-localized ARF
GEF BEN1/MIN7. Taken together our results suggest that BEN3/BIG2 is an ARF GEF
component, which confers BFA sensitivity to the TGN/EE in Arabidopsis.
article_number: 1801-1811
article_processing_charge: No
author:
- first_name: Saeko
full_name: Kitakura, Saeko
last_name: Kitakura
- first_name: Maciek
full_name: Adamowski, Maciek
id: 45F536D2-F248-11E8-B48F-1D18A9856A87
last_name: Adamowski
orcid: 0000-0001-6463-5257
- first_name: Yuki
full_name: Matsuura, Yuki
last_name: Matsuura
- first_name: Luca
full_name: Santuari, Luca
last_name: Santuari
- first_name: Hirotaka
full_name: Kouno, Hirotaka
last_name: Kouno
- first_name: Kohei
full_name: Arima, Kohei
last_name: Arima
- first_name: Christian
full_name: Hardtke, Christian
last_name: Hardtke
- first_name: Jirí
full_name: Friml, Jirí
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Tatsuo
full_name: Kakimoto, Tatsuo
last_name: Kakimoto
- first_name: Hirokazu
full_name: Tanaka, Hirokazu
last_name: Tanaka
citation:
ama: Kitakura S, Adamowski M, Matsuura Y, et al. BEN3/BIG2 ARF GEF is involved in
brefeldin a-sensitive trafficking at the trans-Golgi network/early endosome in
Arabidopsis thaliana. Plant and Cell Physiology. 2017;58(10). doi:10.1093/pcp/pcx118
apa: Kitakura, S., Adamowski, M., Matsuura, Y., Santuari, L., Kouno, H., Arima,
K., … Tanaka, H. (2017). BEN3/BIG2 ARF GEF is involved in brefeldin a-sensitive
trafficking at the trans-Golgi network/early endosome in Arabidopsis thaliana.
Plant and Cell Physiology. Oxford University Press. https://doi.org/10.1093/pcp/pcx118
chicago: Kitakura, Saeko, Maciek Adamowski, Yuki Matsuura, Luca Santuari, Hirotaka
Kouno, Kohei Arima, Christian Hardtke, Jiří Friml, Tatsuo Kakimoto, and Hirokazu
Tanaka. “BEN3/BIG2 ARF GEF Is Involved in Brefeldin a-Sensitive Trafficking at
the Trans-Golgi Network/Early Endosome in Arabidopsis Thaliana.” Plant and
Cell Physiology. Oxford University Press, 2017. https://doi.org/10.1093/pcp/pcx118.
ieee: S. Kitakura et al., “BEN3/BIG2 ARF GEF is involved in brefeldin a-sensitive
trafficking at the trans-Golgi network/early endosome in Arabidopsis thaliana,”
Plant and Cell Physiology, vol. 58, no. 10. Oxford University Press, 2017.
ista: Kitakura S, Adamowski M, Matsuura Y, Santuari L, Kouno H, Arima K, Hardtke
C, Friml J, Kakimoto T, Tanaka H. 2017. BEN3/BIG2 ARF GEF is involved in brefeldin
a-sensitive trafficking at the trans-Golgi network/early endosome in Arabidopsis
thaliana. Plant and Cell Physiology. 58(10), 1801–1811.
mla: Kitakura, Saeko, et al. “BEN3/BIG2 ARF GEF Is Involved in Brefeldin a-Sensitive
Trafficking at the Trans-Golgi Network/Early Endosome in Arabidopsis Thaliana.”
Plant and Cell Physiology, vol. 58, no. 10, 1801–1811, Oxford University
Press, 2017, doi:10.1093/pcp/pcx118.
short: S. Kitakura, M. Adamowski, Y. Matsuura, L. Santuari, H. Kouno, K. Arima,
C. Hardtke, J. Friml, T. Kakimoto, H. Tanaka, Plant and Cell Physiology 58 (2017).
date_created: 2018-12-11T11:48:34Z
date_published: 2017-08-21T00:00:00Z
date_updated: 2023-09-27T11:00:19Z
day: '21'
ddc:
- '581'
department:
- _id: JiFr
doi: 10.1093/pcp/pcx118
external_id:
isi:
- '000413220400019'
pmid:
- '29016942'
file:
- access_level: open_access
checksum: bd3e3a94d55416739cbb19624bb977f8
content_type: application/pdf
creator: dernst
date_created: 2019-04-17T07:52:34Z
date_updated: 2020-07-14T12:48:06Z
file_id: '6333'
file_name: 2017_PlantCellPhysio_Kitakura.pdf
file_size: 1352913
relation: main_file
file_date_updated: 2020-07-14T12:48:06Z
has_accepted_license: '1'
intvolume: ' 58'
isi: 1
issue: '10'
language:
- iso: eng
month: '08'
oa: 1
oa_version: Submitted Version
pmid: 1
publication: Plant and Cell Physiology
publication_identifier:
issn:
- '00320781'
publication_status: published
publisher: Oxford University Press
publist_id: '6854'
pubrep_id: '1009'
quality_controlled: '1'
scopus_import: '1'
status: public
title: BEN3/BIG2 ARF GEF is involved in brefeldin a-sensitive trafficking at the trans-Golgi
network/early endosome in Arabidopsis thaliana
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 58
year: '2017'
...