---
OA_type: closed access
_id: '19420'
abstract:
- lang: eng
text: Auxin and its PIN-FORMED (PIN) exporters are essential for tissue repair and
regeneration in flowering plants. To gain insight into the evolution of this mechanism,
we investigated their roles in leaves excised from Physcomitrium patens, a bryophyte
known for its remarkable cell reprogramming capacity. We used various approaches
to manipulate auxin levels, including exogenous application, pharmacological manipulations,
and auxin biosynthesis mutants. We observed no significant effect on the rate
of cell reprogramming. Rather, our analysis of auxin dynamics revealed a decrease
in auxin levels upon excision, which was followed by a local increase before the
reprogramming process began. Mutant analysis revealed that PpPINs are required
for effective cell reprogramming, and endogenously expressed PpPINA-GFP accumulates
polarly at sites that will develop into future filamentous stem cells. In addition,
hyperpolarized PpPINA variants carrying mutated phosphorylation sites showed a
marked delay in reprogramming, whereas endogenous or nonpolar versions do not
have this effect. These results underscore that both the levels and the polarity
of PpPINA are important for efficient cell reprogramming. Overall, these findings
highlight the pivotal role of PIN polarity in plant regeneration. Furthermore,
they suggest that understanding polarity mechanisms could have broader implications
for improving regenerative processes across various plant species.
acknowledgement: "The authors sincerely thank Dr Barbara Kloeckener Gruissem’s time
and efforts in critical reading and constructive advice on the manuscript. The authors
gratefully acknowledge Dr. Eva Sundberg for generously providing transgenic plants
to support this study.\r\nThis work was supported by the European Research Council
Advanced Grant (ETAP-742985 to H.T. and J.F.) and the Taiwan National Science and
Technology Council (NSTC 112-2311-B-005-008 to H.T. and L.-H.C.)."
article_number: pcaf008
article_processing_charge: No
article_type: original
author:
- first_name: Han
full_name: Tang, Han
id: 19BDF720-25A0-11EA-AC6E-928F3DDC885E
last_name: Tang
orcid: 0000-0001-6152-6637
- first_name: L
full_name: Chen, L
last_name: Chen
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
citation:
ama: Tang H, Chen L, Friml J. Auxin fluctuation and PIN polarization in moss leaf
cell reprogramming. Plant and Cell Physiology. 2025. doi:10.1093/pcp/pcaf008
apa: Tang, H., Chen, L., & Friml, J. (2025). Auxin fluctuation and PIN polarization
in moss leaf cell reprogramming. Plant and Cell Physiology. Oxford University
Press. https://doi.org/10.1093/pcp/pcaf008
chicago: Tang, Han, L Chen, and Jiří Friml. “Auxin Fluctuation and PIN Polarization
in Moss Leaf Cell Reprogramming.” Plant and Cell Physiology. Oxford University
Press, 2025. https://doi.org/10.1093/pcp/pcaf008.
ieee: H. Tang, L. Chen, and J. Friml, “Auxin fluctuation and PIN polarization in
moss leaf cell reprogramming.,” Plant and Cell Physiology. Oxford University
Press, 2025.
ista: Tang H, Chen L, Friml J. 2025. Auxin fluctuation and PIN polarization in moss
leaf cell reprogramming. Plant and Cell Physiology., pcaf008.
mla: Tang, Han, et al. “Auxin Fluctuation and PIN Polarization in Moss Leaf Cell
Reprogramming.” Plant and Cell Physiology, pcaf008, Oxford University Press,
2025, doi:10.1093/pcp/pcaf008.
short: H. Tang, L. Chen, J. Friml, Plant and Cell Physiology (2025).
corr_author: '1'
date_created: 2025-03-19T09:44:19Z
date_published: 2025-03-05T00:00:00Z
date_updated: 2025-09-30T11:05:55Z
day: '05'
department:
- _id: JiFr
doi: 10.1093/pcp/pcaf008
ec_funded: 1
external_id:
isi:
- '001436802900001'
pmid:
- '39829340'
isi: 1
language:
- iso: eng
month: '03'
oa_version: None
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: Plant and Cell Physiology
publication_identifier:
eissn:
- 1471-9053
issn:
- 0032-0781
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Auxin fluctuation and PIN polarization in moss leaf cell reprogramming.
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2025'
...
---
_id: '10583'
abstract:
- lang: eng
text: The synthetic strigolactone (SL) analog, rac-GR24, has been instrumental in
studying the role of SLs as well as karrikins because it activates the receptors
DWARF14 (D14) and KARRIKIN INSENSITIVE 2 (KAI2) of their signaling pathways, respectively.
Treatment with rac-GR24 modifies the root architecture at different levels, such
as decreasing the lateral root density (LRD), while promoting root hair elongation
or flavonol accumulation. Previously, we have shown that the flavonol biosynthesis
is transcriptionally activated in the root by rac-GR24 treatment, but, thus far,
the molecular players involved in that response have remained unknown. To get
an in-depth insight into the changes that occur after the compound is perceived
by the roots, we compared the root transcriptomes of the wild type and the more
axillary growth2 (max2) mutant, affected in both SL and karrikin signaling pathways,
with and without rac-GR24 treatment. Quantitative reverse transcription (qRT)-PCR,
reporter line analysis and mutant phenotyping indicated that the flavonol response
and the root hair elongation are controlled by the ELONGATED HYPOCOTYL 5 (HY5)
and MYB12 transcription factors, but HY5, in contrast to MYB12, affects the LRD
as well. Furthermore, we identified the transcription factors TARGET OF MONOPTEROS
5 (TMO5) and TMO5 LIKE1 as negative and the Mediator complex as positive regulators
of the rac-GR24 effect on LRD. Altogether, hereby, we get closer toward understanding
the molecular mechanisms that underlay the rac-GR24 responses in the root.
acknowledgement: The authors thank Ralf Stracke (Bielefeld University, Bielefeld,
Germany) for providing the myb mutants and their colleagues Bert De Rybel for the
tmo5t;mo5l1 double mutant, Boris Parizot for tips on the RNA-seq analysis, Veronique
Storme for statistical help on both the RNA-seq and lateral root density, and Martine
De Cock for help in preparing the manuscript.
article_processing_charge: No
article_type: original
author:
- first_name: Sylwia
full_name: Struk, Sylwia
last_name: Struk
- first_name: Lukas
full_name: Braem, Lukas
last_name: Braem
- first_name: Cedrick
full_name: Matthys, Cedrick
last_name: Matthys
- first_name: Alan
full_name: Walton, Alan
last_name: Walton
- first_name: Nick
full_name: Vangheluwe, Nick
last_name: Vangheluwe
- first_name: Stan
full_name: Van Praet, Stan
last_name: Van Praet
- first_name: Lingxiang
full_name: Jiang, Lingxiang
last_name: Jiang
- first_name: Pawel
full_name: Baster, Pawel
id: 3028BD74-F248-11E8-B48F-1D18A9856A87
last_name: Baster
- first_name: Carolien
full_name: De Cuyper, Carolien
last_name: De Cuyper
- first_name: Francois-Didier
full_name: Boyer, Francois-Didier
last_name: Boyer
- first_name: Elisabeth
full_name: Stes, Elisabeth
last_name: Stes
- first_name: Tom
full_name: Beeckman, Tom
last_name: Beeckman
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Kris
full_name: Gevaert, Kris
last_name: Gevaert
- first_name: Sofie
full_name: Goormachtig, Sofie
last_name: Goormachtig
citation:
ama: Struk S, Braem L, Matthys C, et al. Transcriptional analysis in the Arabidopsis
roots reveals new regulators that link rac-GR24 treatment with changes in flavonol
accumulation, root hair elongation and lateral root density. Plant & Cell
Physiology. 2022;63(1):104-119. doi:10.1093/pcp/pcab149
apa: Struk, S., Braem, L., Matthys, C., Walton, A., Vangheluwe, N., Van Praet, S.,
… Goormachtig, S. (2022). Transcriptional analysis in the Arabidopsis roots reveals
new regulators that link rac-GR24 treatment with changes in flavonol accumulation,
root hair elongation and lateral root density. Plant & Cell Physiology.
Oxford University Press. https://doi.org/10.1093/pcp/pcab149
chicago: Struk, Sylwia, Lukas Braem, Cedrick Matthys, Alan Walton, Nick Vangheluwe,
Stan Van Praet, Lingxiang Jiang, et al. “Transcriptional Analysis in the Arabidopsis
Roots Reveals New Regulators That Link Rac-GR24 Treatment with Changes in Flavonol
Accumulation, Root Hair Elongation and Lateral Root Density.” Plant & Cell
Physiology. Oxford University Press, 2022. https://doi.org/10.1093/pcp/pcab149.
ieee: S. Struk et al., “Transcriptional analysis in the Arabidopsis roots
reveals new regulators that link rac-GR24 treatment with changes in flavonol accumulation,
root hair elongation and lateral root density,” Plant & Cell Physiology,
vol. 63, no. 1. Oxford University Press, pp. 104–119, 2022.
ista: Struk S, Braem L, Matthys C, Walton A, Vangheluwe N, Van Praet S, Jiang L,
Baster P, De Cuyper C, Boyer F-D, Stes E, Beeckman T, Friml J, Gevaert K, Goormachtig
S. 2022. Transcriptional analysis in the Arabidopsis roots reveals new regulators
that link rac-GR24 treatment with changes in flavonol accumulation, root hair
elongation and lateral root density. Plant & Cell Physiology. 63(1), 104–119.
mla: Struk, Sylwia, et al. “Transcriptional Analysis in the Arabidopsis Roots Reveals
New Regulators That Link Rac-GR24 Treatment with Changes in Flavonol Accumulation,
Root Hair Elongation and Lateral Root Density.” Plant & Cell Physiology,
vol. 63, no. 1, Oxford University Press, 2022, pp. 104–19, doi:10.1093/pcp/pcab149.
short: S. Struk, L. Braem, C. Matthys, A. Walton, N. Vangheluwe, S. Van Praet, L.
Jiang, P. Baster, C. De Cuyper, F.-D. Boyer, E. Stes, T. Beeckman, J. Friml, K.
Gevaert, S. Goormachtig, Plant & Cell Physiology 63 (2022) 104–119.
date_created: 2021-12-28T11:44:18Z
date_published: 2022-01-21T00:00:00Z
date_updated: 2026-06-18T08:43:19Z
day: '21'
ddc:
- '580'
department:
- _id: JiFr
doi: 10.1093/pcp/pcab149
external_id:
isi:
- '000877899400009'
pmid:
- '34791413'
intvolume: ' 63'
isi: 1
issue: '1'
keyword:
- flavonols
- MAX2
- rac-Gr24
- RNA-seq
- root development
- transcriptional regulation
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1093/pcp/pcab149
month: '01'
oa: 1
oa_version: Published Version
page: 104-119
pmid: 1
publication: Plant & Cell Physiology
publication_identifier:
eissn:
- 1471-9053
issn:
- 0032-0781
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Transcriptional analysis in the Arabidopsis roots reveals new regulators that
link rac-GR24 treatment with changes in flavonol accumulation, root hair elongation
and lateral root density
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 63
year: '2022'
...
---
_id: '6104'
abstract:
- lang: eng
text: Abiotic stress poses constant challenges for plant survival and is a serious
problem for global agricultural productivity. On a molecular level, stress conditions
result in elevation of reactive oxygen species (ROS) production causing oxidative
stress associated with oxidation of proteins and nucleic acids as well as impairment
of membrane functions. Adaptation of root growth to ROS accumulation is facilitated
through modification of auxin and cytokinin hormone homeostasis. Here, we report
that in Arabidopsis root meristem, ROS-induced changes of auxin levels correspond
to decreased abundance of PIN auxin efflux carriers at the plasma membrane (PM).
Specifically, increase in H2O2 levels affects PIN2 endocytic recycling. We show
that the PIN2 intracellular trafficking during adaptation to oxidative stress
requires the function of the ADP-ribosylation factor (ARF)-guanine-nucleotide
exchange factor (GEF) BEN1, an actin-associated regulator of the trafficking from
the PM to early endosomes and, presumably, indirectly, trafficking to the vacuoles.
We propose that H2O2 levels affect the actin dynamics thus modulating ARF-GEF-dependent
trafficking of PIN2. This mechanism provides a way how root growth acclimates
to stress and adapts to a changing environment.
article_processing_charge: No
author:
- first_name: Marta
full_name: Zwiewka, Marta
last_name: Zwiewka
- first_name: Agnieszka
full_name: Bielach, Agnieszka
last_name: Bielach
- first_name: Prashanth
full_name: Tamizhselvan, Prashanth
last_name: Tamizhselvan
- first_name: Sharmila
full_name: Madhavan, Sharmila
last_name: Madhavan
- first_name: Eman Elrefaay
full_name: Ryad, Eman Elrefaay
last_name: Ryad
- first_name: Shutang
full_name: Tan, Shutang
id: 2DE75584-F248-11E8-B48F-1D18A9856A87
last_name: Tan
orcid: 0000-0002-0471-8285
- first_name: Mónika
full_name: Hrtyan, Mónika
id: 45A71A74-F248-11E8-B48F-1D18A9856A87
last_name: Hrtyan
- first_name: Petre
full_name: Dobrev, Petre
last_name: Dobrev
- first_name: Radomira
full_name: Vanková, Radomira
last_name: Vanková
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Vanesa B.
full_name: Tognetti, Vanesa B.
last_name: Tognetti
citation:
ama: Zwiewka M, Bielach A, Tamizhselvan P, et al. Root adaptation to H2O2-induced
oxidative stress by ARF-GEF BEN1- and cytoskeleton-mediated PIN2 trafficking.
Plant and Cell Physiology. 2019;60(2):255-273. doi:10.1093/pcp/pcz001
apa: Zwiewka, M., Bielach, A., Tamizhselvan, P., Madhavan, S., Ryad, E. E., Tan,
S., … Tognetti, V. B. (2019). Root adaptation to H2O2-induced oxidative stress
by ARF-GEF BEN1- and cytoskeleton-mediated PIN2 trafficking. Plant and Cell
Physiology. Oxford University Press. https://doi.org/10.1093/pcp/pcz001
chicago: Zwiewka, Marta, Agnieszka Bielach, Prashanth Tamizhselvan, Sharmila Madhavan,
Eman Elrefaay Ryad, Shutang Tan, Mónika Hrtyan, et al. “Root Adaptation to H2O2-Induced
Oxidative Stress by ARF-GEF BEN1- and Cytoskeleton-Mediated PIN2 Trafficking.”
Plant and Cell Physiology. Oxford University Press, 2019. https://doi.org/10.1093/pcp/pcz001.
ieee: M. Zwiewka et al., “Root adaptation to H2O2-induced oxidative stress
by ARF-GEF BEN1- and cytoskeleton-mediated PIN2 trafficking,” Plant and Cell
Physiology, vol. 60, no. 2. Oxford University Press, pp. 255–273, 2019.
ista: Zwiewka M, Bielach A, Tamizhselvan P, Madhavan S, Ryad EE, Tan S, Hrtyan M,
Dobrev P, Vanková R, Friml J, Tognetti VB. 2019. Root adaptation to H2O2-induced
oxidative stress by ARF-GEF BEN1- and cytoskeleton-mediated PIN2 trafficking.
Plant and Cell Physiology. 60(2), 255–273.
mla: Zwiewka, Marta, et al. “Root Adaptation to H2O2-Induced Oxidative Stress by
ARF-GEF BEN1- and Cytoskeleton-Mediated PIN2 Trafficking.” Plant and Cell Physiology,
vol. 60, no. 2, Oxford University Press, 2019, pp. 255–73, doi:10.1093/pcp/pcz001.
short: M. Zwiewka, A. Bielach, P. Tamizhselvan, S. Madhavan, E.E. Ryad, S. Tan,
M. Hrtyan, P. Dobrev, R. Vanková, J. Friml, V.B. Tognetti, Plant and Cell Physiology
60 (2019) 255–273.
date_created: 2019-03-17T22:59:14Z
date_published: 2019-02-01T00:00:00Z
date_updated: 2023-08-25T08:05:28Z
day: '01'
department:
- _id: JiFr
doi: 10.1093/pcp/pcz001
external_id:
isi:
- '000459634300002'
pmid:
- '30668780'
intvolume: ' 60'
isi: 1
issue: '2'
language:
- iso: eng
month: '02'
oa_version: None
page: 255-273
pmid: 1
publication: Plant and Cell Physiology
publication_identifier:
eissn:
- 1471-9053
issn:
- 0032-0781
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Root adaptation to H2O2-induced oxidative stress by ARF-GEF BEN1- and cytoskeleton-mediated
PIN2 trafficking
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 60
year: '2019'
...
---
_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: 2025-07-10T11:54:55Z
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:
- 0032-0781
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: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 58
year: '2017'
...
---
_id: '12196'
abstract:
- lang: eng
text: SNC1 (SUPPRESSOR OF NPR1, CONSTITUTIVE 1) is one of a suite of intracellular
Arabidopsis NOD-like receptor (NLR) proteins which, upon activation, result in
the induction of defense responses. However, the molecular mechanisms underlying
NLR activation and the subsequent provocation of immune responses are only partially
characterized. To identify negative regulators of NLR-mediated immunity, a forward
genetic screen was undertaken to search for enhancers of the dwarf, autoimmune
gain-of-function snc1 mutant. To avoid lethality resulting from severe dwarfism,
the screen was conducted using mos4 (modifier of snc1, 4) snc1 plants, which display
wild-type-like morphology and resistance. M2 progeny were screened for mutant,
snc1-enhancing (muse) mutants displaying a reversion to snc1-like phenotypes.
The muse9 mos4 snc1 triple mutant was found to exhibit dwarf morphology, elevated
expression of the pPR2-GUS defense marker reporter gene and enhanced resistance
to the oomycete pathogen Hyaloperonospora arabidopsidis Noco2. Via map-based cloning
and Illumina sequencing, it was determined that the muse9 mutation is in the gene
encoding the SWI/SNF chromatin remodeler SYD (SPLAYED), and was thus renamed syd-10.
The syd-10 single mutant has no observable alteration from wild-type-like resistance,
although the syd-4 T-DNA insertion allele displays enhanced resistance to the
bacterial pathogen Pseudomonas syringae pv. maculicola ES4326. Transcription of
SNC1 is increased in both syd-4 and syd-10. These data suggest that SYD plays
a subtle, specific role in the regulation of SNC1 expression and SNC1-mediated
immunity. SYD may work with other proteins at the chromatin level to repress SNC1
transcription; such regulation is important for fine-tuning the expression of
NLR-encoding genes to prevent unpropitious autoimmunity.
acknowledgement: "This work was supported by the National Sciences and Engineering
Research Council of Canada [Canada Graduate\r\nScholarship–Doctoral to K.J.; Discovery
Grant to X.L.]; the department of Botany at the University of f British Columbia\r\n[the
Dewar Cooper Memorial Fund to X.L.].The authors would like to thank Dr. Yuelin Zhang
and Ms. Yan Li for their assistance with next-generation sequencing, and Mr. Charles
Copeland for critical reading of the manuscript."
article_processing_charge: No
article_type: original
author:
- first_name: Kaeli C.M.
full_name: Johnson, Kaeli C.M.
last_name: Johnson
- first_name: Shitou
full_name: Xia, Shitou
last_name: Xia
- first_name: Xiaoqi
full_name: Feng, Xiaoqi
id: e0164712-22ee-11ed-b12a-d80fcdf35958
last_name: Feng
orcid: 0000-0002-4008-1234
- first_name: Xin
full_name: Li, Xin
last_name: Li
citation:
ama: Johnson KCM, Xia S, Feng X, Li X. The chromatin remodeler SPLAYED negatively
regulates SNC1-mediated immunity. Plant and Cell Physiology. 2015;56(8):1616-1623.
doi:10.1093/pcp/pcv087
apa: Johnson, K. C. M., Xia, S., Feng, X., & Li, X. (2015). The chromatin remodeler
SPLAYED negatively regulates SNC1-mediated immunity. Plant and Cell Physiology.
Oxford University Press. https://doi.org/10.1093/pcp/pcv087
chicago: Johnson, Kaeli C.M., Shitou Xia, Xiaoqi Feng, and Xin Li. “The Chromatin
Remodeler SPLAYED Negatively Regulates SNC1-Mediated Immunity.” Plant and Cell
Physiology. Oxford University Press, 2015. https://doi.org/10.1093/pcp/pcv087.
ieee: K. C. M. Johnson, S. Xia, X. Feng, and X. Li, “The chromatin remodeler SPLAYED
negatively regulates SNC1-mediated immunity,” Plant and Cell Physiology,
vol. 56, no. 8. Oxford University Press, pp. 1616–1623, 2015.
ista: Johnson KCM, Xia S, Feng X, Li X. 2015. The chromatin remodeler SPLAYED negatively
regulates SNC1-mediated immunity. Plant and Cell Physiology. 56(8), 1616–1623.
mla: Johnson, Kaeli C. M., et al. “The Chromatin Remodeler SPLAYED Negatively Regulates
SNC1-Mediated Immunity.” Plant and Cell Physiology, vol. 56, no. 8, Oxford
University Press, 2015, pp. 1616–23, doi:10.1093/pcp/pcv087.
short: K.C.M. Johnson, S. Xia, X. Feng, X. Li, Plant and Cell Physiology 56 (2015)
1616–1623.
date_created: 2023-01-16T09:20:22Z
date_published: 2015-08-01T00:00:00Z
date_updated: 2023-05-08T11:03:23Z
department:
- _id: XiFe
doi: 10.1093/pcp/pcv087
extern: '1'
external_id:
pmid:
- '26063389'
intvolume: ' 56'
issue: '8'
keyword:
- Cell Biology
- Plant Science
- Physiology
- General Medicine
language:
- iso: eng
month: '08'
oa_version: None
page: 1616-1623
pmid: 1
publication: Plant and Cell Physiology
publication_identifier:
issn:
- 0032-0781
- 1471-9053
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: The chromatin remodeler SPLAYED negatively regulates SNC1-mediated immunity
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 56
year: '2015'
...
---
_id: '2222'
abstract:
- lang: eng
text: Leaf venation develops complex patterns in angiosperms, but the mechanism
underlying this process is largely unknown. To elucidate the molecular mechanisms
governing vein pattern formation, we previously isolated vascular network defective
(van) mutants that displayed venation discontinuities. Here, we report the phenotypic
analysis of van4 mutants, and we identify and characterize the VAN4 gene. Detailed
phenotypic analysis shows that van4 mutants are defective in procambium cell differentiation
and subsequent vascular cell differentiation. Reduced shoot and root cell growth
is observed in van4 mutants, suggesting that VAN4 function is important for cell
growth and the establishment of venation continuity. Consistent with these phenotypes,
the VAN4 gene is strongly expressed in vascular and meristematic cells. VAN4 encodes
a putative TRS120, which is a known guanine nucleotide exchange factor (GEF) for
Rab GTPase involved in regulating vesicle transport, and a known tethering factor
that determines the specificity of membrane fusion. VAN4 protein localizes at
the trans-Golgi network/early endosome (TGN/EE). Aberrant recycling of the auxin
efflux carrier PIN proteins is observed in van4 mutants. These results suggest
that VAN4-mediated exocytosis at the TGN plays important roles in plant vascular
development and cell growth in shoot and root. Our identification of VAN4 as a
putative TRS120 shows that Rab GTPases are crucial (in addition to ARF GTPases)
for continuous vascular development, and provides further evidence for the importance
of vesicle transport in leaf vascular formation.
article_processing_charge: No
author:
- first_name: Satoshi
full_name: Naramoto, Satoshi
last_name: Naramoto
- first_name: Tomasz
full_name: Nodzyński, Tomasz
last_name: Nodzyński
- first_name: Tomoko
full_name: Dainobu, Tomoko
last_name: Dainobu
- first_name: Hirotomo
full_name: Takatsuka, Hirotomo
last_name: Takatsuka
- first_name: Teruyo
full_name: Okada, Teruyo
last_name: Okada
- first_name: Jirí
full_name: Friml, Jirí
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Hiroo
full_name: Fukuda, Hiroo
last_name: Fukuda
citation:
ama: Naramoto S, Nodzyński T, Dainobu T, et al. VAN4 encodes a putative TRS120 that
is required for normal cell growth and vein development in arabidopsis. Plant
and Cell Physiology. 2014;55(4):750-763. doi:10.1093/pcp/pcu012
apa: Naramoto, S., Nodzyński, T., Dainobu, T., Takatsuka, H., Okada, T., Friml,
J., & Fukuda, H. (2014). VAN4 encodes a putative TRS120 that is required for
normal cell growth and vein development in arabidopsis. Plant and Cell Physiology.
Oxford University Press. https://doi.org/10.1093/pcp/pcu012
chicago: Naramoto, Satoshi, Tomasz Nodzyński, Tomoko Dainobu, Hirotomo Takatsuka,
Teruyo Okada, Jiří Friml, and Hiroo Fukuda. “VAN4 Encodes a Putative TRS120 That
Is Required for Normal Cell Growth and Vein Development in Arabidopsis.” Plant
and Cell Physiology. Oxford University Press, 2014. https://doi.org/10.1093/pcp/pcu012.
ieee: S. Naramoto et al., “VAN4 encodes a putative TRS120 that is required
for normal cell growth and vein development in arabidopsis,” Plant and Cell
Physiology, vol. 55, no. 4. Oxford University Press, pp. 750–763, 2014.
ista: Naramoto S, Nodzyński T, Dainobu T, Takatsuka H, Okada T, Friml J, Fukuda
H. 2014. VAN4 encodes a putative TRS120 that is required for normal cell growth
and vein development in arabidopsis. Plant and Cell Physiology. 55(4), 750–763.
mla: Naramoto, Satoshi, et al. “VAN4 Encodes a Putative TRS120 That Is Required
for Normal Cell Growth and Vein Development in Arabidopsis.” Plant and Cell
Physiology, vol. 55, no. 4, Oxford University Press, 2014, pp. 750–63, doi:10.1093/pcp/pcu012.
short: S. Naramoto, T. Nodzyński, T. Dainobu, H. Takatsuka, T. Okada, J. Friml,
H. Fukuda, Plant and Cell Physiology 55 (2014) 750–763.
date_created: 2018-12-11T11:56:24Z
date_published: 2014-04-01T00:00:00Z
date_updated: 2025-09-29T11:28:27Z
day: '01'
department:
- _id: JiFr
doi: 10.1093/pcp/pcu012
ec_funded: 1
external_id:
isi:
- '000334679500009'
intvolume: ' 55'
isi: 1
issue: '4'
language:
- iso: eng
month: '04'
oa_version: None
page: 750 - 763
project:
- _id: 25716A02-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '282300'
name: Polarity and subcellular dynamics in plants
publication: Plant and Cell Physiology
publication_identifier:
issn:
- 0032-0781
publication_status: published
publisher: Oxford University Press
publist_id: '4742'
quality_controlled: '1'
scopus_import: '1'
status: public
title: VAN4 encodes a putative TRS120 that is required for normal cell growth and
vein development in arabidopsis
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 55
year: '2014'
...
---
_id: '2223'
abstract:
- lang: eng
text: Correct positioning of membrane proteins is an essential process in eukaryotic
organisms. The plant hormone auxin is distributed through intercellular transport
and triggers various cellular responses. Auxin transporters of the PIN-FORMED
(PIN) family localize asymmetrically at the plasma membrane (PM) and mediate the
directional transport of auxin between cells. A fungal toxin, brefeldin A (BFA),
inhibits a subset of guanine nucleotide exchange factors for ADP-ribosylation
factor small GTPases (ARF GEFs) including GNOM, which plays a major role in localization
of PIN1 predominantly to the basal side of the PM. The Arabidopsis genome encodes
19 ARF-related putative GTPases. However, ARF components involved in PIN1 localization
have been genetically poorly defined. Using a fluorescence imaging-based forward
genetic approach, we identified an Arabidopsis mutant, bfa-visualized exocytic
trafficking defective1 (bex1), in which PM localization of PIN1-green fluorescent
protein (GFP) as well as development is hypersensitive to BFA. We found that in
bex1 a member of the ARF1 gene family, ARF1A1C, was mutated. ARF1A1C localizes
to the trans-Golgi network/early endosome and Golgi apparatus, acts synergistically
to BEN1/MIN7 ARF GEF and is important for PIN recycling to the PM. Consistent
with the developmental importance of PIN proteins, functional interference with
ARF1 resulted in an impaired auxin response gradient and various developmental
defects including embryonic patterning defects and growth arrest. Our results
show that ARF1A1C is essential for recycling of PIN auxin transporters and for
various auxin-dependent developmental processes.
article_processing_charge: No
author:
- first_name: Hirokazu
full_name: Tanaka, Hirokazu
last_name: Tanaka
- first_name: Tomasz
full_name: Nodzyński, Tomasz
last_name: Nodzyński
- first_name: Saeko
full_name: Kitakura, Saeko
last_name: Kitakura
- first_name: Mugurel
full_name: Feraru, Mugurel
last_name: Feraru
- first_name: Michiko
full_name: Sasabe, Michiko
last_name: Sasabe
- first_name: Tomomi
full_name: Ishikawa, Tomomi
last_name: Ishikawa
- first_name: Jürgen
full_name: Kleine Vehn, Jürgen
last_name: Kleine Vehn
- first_name: Tatsuo
full_name: Kakimoto, Tatsuo
last_name: Kakimoto
- first_name: Jirí
full_name: Friml, Jirí
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
citation:
ama: Tanaka H, Nodzyński T, Kitakura S, et al. BEX1/ARF1A1C is required for BFA-sensitive
recycling of PIN auxin transporters and auxin-mediated development in arabidopsis.
Plant and Cell Physiology. 2014;55(4):737-749. doi:10.1093/pcp/pct196
apa: Tanaka, H., Nodzyński, T., Kitakura, S., Feraru, M., Sasabe, M., Ishikawa,
T., … Friml, J. (2014). BEX1/ARF1A1C is required for BFA-sensitive recycling of
PIN auxin transporters and auxin-mediated development in arabidopsis. Plant
and Cell Physiology. Oxford University Press. https://doi.org/10.1093/pcp/pct196
chicago: Tanaka, Hirokazu, Tomasz Nodzyński, Saeko Kitakura, Mugurel Feraru, Michiko
Sasabe, Tomomi Ishikawa, Jürgen Kleine Vehn, Tatsuo Kakimoto, and Jiří Friml.
“BEX1/ARF1A1C Is Required for BFA-Sensitive Recycling of PIN Auxin Transporters
and Auxin-Mediated Development in Arabidopsis.” Plant and Cell Physiology.
Oxford University Press, 2014. https://doi.org/10.1093/pcp/pct196.
ieee: H. Tanaka et al., “BEX1/ARF1A1C is required for BFA-sensitive recycling
of PIN auxin transporters and auxin-mediated development in arabidopsis,” Plant
and Cell Physiology, vol. 55, no. 4. Oxford University Press, pp. 737–749,
2014.
ista: Tanaka H, Nodzyński T, Kitakura S, Feraru M, Sasabe M, Ishikawa T, Kleine
Vehn J, Kakimoto T, Friml J. 2014. BEX1/ARF1A1C is required for BFA-sensitive
recycling of PIN auxin transporters and auxin-mediated development in arabidopsis.
Plant and Cell Physiology. 55(4), 737–749.
mla: Tanaka, Hirokazu, et al. “BEX1/ARF1A1C Is Required for BFA-Sensitive Recycling
of PIN Auxin Transporters and Auxin-Mediated Development in Arabidopsis.” Plant
and Cell Physiology, vol. 55, no. 4, Oxford University Press, 2014, pp. 737–49,
doi:10.1093/pcp/pct196.
short: H. Tanaka, T. Nodzyński, S. Kitakura, M. Feraru, M. Sasabe, T. Ishikawa,
J. Kleine Vehn, T. Kakimoto, J. Friml, Plant and Cell Physiology 55 (2014) 737–749.
date_created: 2018-12-11T11:56:25Z
date_published: 2014-04-01T00:00:00Z
date_updated: 2025-09-29T11:27:52Z
day: '01'
ddc:
- '570'
department:
- _id: JiFr
doi: 10.1093/pcp/pct196
ec_funded: 1
external_id:
isi:
- '000334679500008'
pmid:
- '24369434'
file:
- access_level: open_access
checksum: b781a76b32ac35a520256453c3ba9433
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:14:25Z
date_updated: 2020-07-14T12:45:34Z
file_id: '5076'
file_name: IST-2016-431-v1+1_Plant_Cell_Physiol-2014-Tanaka-737-49.pdf
file_size: 2028111
relation: main_file
file_date_updated: 2020-07-14T12:45:34Z
has_accepted_license: '1'
intvolume: ' 55'
isi: 1
issue: '4'
language:
- iso: eng
license: https://creativecommons.org/licenses/by-nc/4.0/
month: '04'
oa: 1
oa_version: Published Version
page: 737 - 749
pmid: 1
project:
- _id: 25716A02-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '282300'
name: Polarity and subcellular dynamics in plants
- _id: 256BDAB0-B435-11E9-9278-68D0E5697425
name: Innovationsförderung in der Grenzregion Österreich – Tschechische Republik
durch die Schaffung von Synergien im Bereich der Forschungsinfrastruktur
publication: Plant and Cell Physiology
publication_identifier:
issn:
- 0032-0781
publication_status: published
publisher: Oxford University Press
publist_id: '4741'
pubrep_id: '431'
quality_controlled: '1'
scopus_import: '1'
status: public
title: BEX1/ARF1A1C is required for BFA-sensitive recycling of PIN auxin transporters
and auxin-mediated development in arabidopsis
tmp:
image: /images/cc_by_nc.png
legal_code_url: https://creativecommons.org/licenses/by-nc/4.0/legalcode
name: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
short: CC BY-NC (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 55
year: '2014'
...