---
_id: '14313'
abstract:
- lang: eng
text: To respond to auxin, the chief orchestrator of their multicellularity, plants
evolved multiple receptor systems and signal transduction cascades. Despite decades
of research, however, we are still lacking a satisfactory synthesis of various
auxin signaling mechanisms. The chief discrepancy and historical controversy of
the field is that of rapid and slow auxin effects on plant physiology and development.
How is it possible that ions begin to trickle across the plasma membrane as soon
as auxin enters the cell, even though the best-characterized transcriptional auxin
pathway can take effect only after tens of minutes? Recently, unexpected progress
has been made in understanding this and other unknowns of auxin signaling. We
provide a perspective on these exciting developments and concepts whose general
applicability might have ramifications beyond auxin signaling.
acknowledgement: The opening quote is not intended to reflect any political views
of the authors. The authors by no means endorse the rhetoric of Donald Rumsfeld
or the 2003 invasion of Iraq by the United States. Nevertheless, Rumsfeld's quote
led to both public and academic debates on the concept of known and unknown unknowns,
which can be applied to the recent unexpected developments in the auxin signaling
field. We thank Linlin Qi and Huihuang Chen for their suggestions on figure presentation
and inspiring discussions of TIR1/AFB signaling. Finally, we thank Aroosa Hussain
for discussion of Greek mythology.
article_number: '102443'
article_processing_charge: No
article_type: review
author:
- first_name: Lukas
full_name: Fiedler, Lukas
id: 7c417475-8972-11ed-ae7b-8b674ca26986
last_name: Fiedler
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
citation:
ama: 'Fiedler L, Friml J. Rapid auxin signaling: Unknowns old and new. Current
Opinion in Plant Biology. 2023;75(10). doi:10.1016/j.pbi.2023.102443'
apa: 'Fiedler, L., & Friml, J. (2023). Rapid auxin signaling: Unknowns old and
new. Current Opinion in Plant Biology. Elsevier. https://doi.org/10.1016/j.pbi.2023.102443'
chicago: 'Fiedler, Lukas, and Jiří Friml. “Rapid Auxin Signaling: Unknowns Old and
New.” Current Opinion in Plant Biology. Elsevier, 2023. https://doi.org/10.1016/j.pbi.2023.102443.'
ieee: 'L. Fiedler and J. Friml, “Rapid auxin signaling: Unknowns old and new,” Current
Opinion in Plant Biology, vol. 75, no. 10. Elsevier, 2023.'
ista: 'Fiedler L, Friml J. 2023. Rapid auxin signaling: Unknowns old and new. Current
Opinion in Plant Biology. 75(10), 102443.'
mla: 'Fiedler, Lukas, and Jiří Friml. “Rapid Auxin Signaling: Unknowns Old and New.”
Current Opinion in Plant Biology, vol. 75, no. 10, 102443, Elsevier, 2023,
doi:10.1016/j.pbi.2023.102443.'
short: L. Fiedler, J. Friml, Current Opinion in Plant Biology 75 (2023).
corr_author: '1'
date_created: 2023-09-10T22:01:11Z
date_published: 2023-10-01T00:00:00Z
date_updated: 2025-09-09T12:54:16Z
day: '01'
ddc:
- '580'
department:
- _id: JiFr
doi: 10.1016/j.pbi.2023.102443
external_id:
isi:
- '001080095300001'
pmid:
- '37666097'
file:
- access_level: open_access
checksum: 1c476c3414d2dfb0c85db0cb6cfd8a28
content_type: application/pdf
creator: amally
date_created: 2023-11-02T17:03:20Z
date_updated: 2023-11-02T17:03:20Z
file_id: '14482'
file_name: Fiedler CurrOpinOlantBiol 2023_revised.pdf
file_size: 737872
relation: main_file
success: 1
file_date_updated: 2023-11-02T17:03:20Z
has_accepted_license: '1'
intvolume: ' 75'
isi: 1
issue: '10'
language:
- iso: eng
month: '10'
oa: 1
oa_version: Submitted Version
pmid: 1
publication: Current Opinion in Plant Biology
publication_identifier:
issn:
- 1369-5266
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Rapid auxin signaling: Unknowns old and new'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 75
year: '2023'
...
---
_id: '10768'
abstract:
- lang: eng
text: Among the most fascinated properties of the plant hormone auxin is its ability
to promote formation of its own directional transport routes. These gradually
narrowing auxin channels form from the auxin source toward the sink and involve
coordinated, collective polarization of individual cells. Once established, the
channels provide positional information, along which new vascular strands form,
for example, during organogenesis, regeneration, or leave venation. The main prerequisite
of this still mysterious auxin canalization mechanism is a feedback between auxin
signaling and its directional transport. This is manifested by auxin-induced re-arrangements
of polar, subcellular localization of PIN-FORMED (PIN) auxin exporters. Immanent
open questions relate to how position of auxin source and sink as well as tissue
context are sensed and translated into tissue polarization and how cells communicate
to polarize coordinately. Recently, identification of the first molecular players
opens new avenues into molecular studies of this intriguing example of self-organizing
plant development.
acknowledgement: The authors apologize to those researchers whose work was not cited.
In addition, exciting topics such as PIN polarization in context of phyllotaxis,
shoot branching and termination of gravitropic bending, or role of additional auxin
transporters could not have been included owing to lack of space. This work was
supported by the Czech Science Foundation GAČR (GA18-26981S). The authors also acknowledge
the EMBO for supporting J.H. with a long-term fellowship (ALTF217-2021).
article_number: '102174'
article_processing_charge: Yes (via OA deal)
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: Shutang
full_name: Tan, Shutang
id: 2DE75584-F248-11E8-B48F-1D18A9856A87
last_name: Tan
orcid: 0000-0002-0471-8285
- 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, Tan S, Friml J. Auxin canalization: From speculative models toward
molecular players. Current Opinion in Plant Biology. 2022;65(2). doi:10.1016/j.pbi.2022.102174'
apa: 'Hajny, J., Tan, S., & Friml, J. (2022). Auxin canalization: From speculative
models toward molecular players. Current Opinion in Plant Biology. Elsevier.
https://doi.org/10.1016/j.pbi.2022.102174'
chicago: 'Hajny, Jakub, Shutang Tan, and Jiří Friml. “Auxin Canalization: From Speculative
Models toward Molecular Players.” Current Opinion in Plant Biology. Elsevier,
2022. https://doi.org/10.1016/j.pbi.2022.102174.'
ieee: 'J. Hajny, S. Tan, and J. Friml, “Auxin canalization: From speculative models
toward molecular players,” Current Opinion in Plant Biology, vol. 65, no.
2. Elsevier, 2022.'
ista: 'Hajny J, Tan S, Friml J. 2022. Auxin canalization: From speculative models
toward molecular players. Current Opinion in Plant Biology. 65(2), 102174.'
mla: 'Hajny, Jakub, et al. “Auxin Canalization: From Speculative Models toward Molecular
Players.” Current Opinion in Plant Biology, vol. 65, no. 2, 102174, Elsevier,
2022, doi:10.1016/j.pbi.2022.102174.'
short: J. Hajny, S. Tan, J. Friml, Current Opinion in Plant Biology 65 (2022).
corr_author: '1'
date_created: 2022-02-20T23:01:32Z
date_published: 2022-02-01T00:00:00Z
date_updated: 2024-10-09T21:01:37Z
day: '01'
ddc:
- '580'
department:
- _id: JiFr
doi: 10.1016/j.pbi.2022.102174
external_id:
isi:
- '000758724700004'
pmid:
- '35123880'
file:
- access_level: open_access
checksum: f1ee02b6fb4200934eeb31fa69120885
content_type: application/pdf
creator: dernst
date_created: 2022-03-10T13:34:09Z
date_updated: 2022-03-10T13:34:09Z
file_id: '10844'
file_name: 2022_CurrentOpPlantBiology_Hajny.pdf
file_size: 820322
relation: main_file
success: 1
file_date_updated: 2022-03-10T13:34:09Z
has_accepted_license: '1'
intvolume: ' 65'
isi: 1
issue: '2'
language:
- iso: eng
month: '02'
oa: 1
oa_version: Published Version
pmid: 1
publication: Current Opinion in Plant Biology
publication_identifier:
issn:
- 1369-5266
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Auxin canalization: From speculative models toward molecular players'
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: 65
year: '2022'
...
---
_id: '7142'
abstract:
- lang: eng
text: The phytohormone auxin acts as an amazingly versatile coordinator of plant
growth and development. With its morphogen-like properties, auxin controls sites
and timing of differentiation and/or growth responses both, in quantitative and
qualitative terms. Specificity in the auxin response depends largely on distinct
modes of signal transmission, by which individual cells perceive and convert auxin
signals into a remarkable diversity of responses. The best understood, or so-called
canonical mechanism of auxin perception ultimately results in variable adjustments
of the cellular transcriptome, via a short, nuclear signal transduction pathway.
Additional findings that accumulated over decades implied that an additional,
presumably, cell surface-based auxin perception mechanism mediates very rapid
cellular responses and decisively contributes to the cell's overall hormonal response.
Recent investigations into both, nuclear and cell surface auxin signalling challenged
this assumed partition of roles for different auxin signalling pathways and revealed
an unexpected complexity in transcriptional and non-transcriptional cellular responses
mediated by auxin.
acknowledgement: Research in J.F. laboratory is funded by the European Union's Horizon
2020 program (ERC grant agreement n° 742985); C.L. is supported by the Austrian
Science Fund (FWF grant P 31493).
article_processing_charge: No
article_type: original
author:
- 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: Christian
full_name: Luschnig, Christian
last_name: Luschnig
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
citation:
ama: 'Gallei MC, Luschnig C, Friml J. Auxin signalling in growth: Schrödinger’s
cat out of the bag. Current Opinion in Plant Biology. 2020;53(2):43-49.
doi:10.1016/j.pbi.2019.10.003'
apa: 'Gallei, M. C., Luschnig, C., & Friml, J. (2020). Auxin signalling in growth:
Schrödinger’s cat out of the bag. Current Opinion in Plant Biology. Elsevier.
https://doi.org/10.1016/j.pbi.2019.10.003'
chicago: 'Gallei, Michelle C, Christian Luschnig, and Jiří Friml. “Auxin Signalling
in Growth: Schrödinger’s Cat out of the Bag.” Current Opinion in Plant Biology.
Elsevier, 2020. https://doi.org/10.1016/j.pbi.2019.10.003.'
ieee: 'M. C. Gallei, C. Luschnig, and J. Friml, “Auxin signalling in growth: Schrödinger’s
cat out of the bag,” Current Opinion in Plant Biology, vol. 53, no. 2.
Elsevier, pp. 43–49, 2020.'
ista: 'Gallei MC, Luschnig C, Friml J. 2020. Auxin signalling in growth: Schrödinger’s
cat out of the bag. Current Opinion in Plant Biology. 53(2), 43–49.'
mla: 'Gallei, Michelle C., et al. “Auxin Signalling in Growth: Schrödinger’s Cat
out of the Bag.” Current Opinion in Plant Biology, vol. 53, no. 2, Elsevier,
2020, pp. 43–49, doi:10.1016/j.pbi.2019.10.003.'
short: M.C. Gallei, C. Luschnig, J. Friml, Current Opinion in Plant Biology 53 (2020)
43–49.
corr_author: '1'
date_created: 2019-12-02T12:05:26Z
date_published: 2020-02-01T00:00:00Z
date_updated: 2026-04-07T14:18:57Z
day: '01'
department:
- _id: JiFr
doi: 10.1016/j.pbi.2019.10.003
ec_funded: 1
external_id:
isi:
- '000521120600007'
pmid:
- '31760231'
intvolume: ' 53'
isi: 1
issue: '2'
language:
- iso: eng
month: '02'
oa_version: None
page: 43-49
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: Current Opinion in Plant Biology
publication_identifier:
eissn:
- 1879-0356
issn:
- 1369-5266
publication_status: published
publisher: Elsevier
quality_controlled: '1'
related_material:
record:
- id: '11626'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: 'Auxin signalling in growth: Schrödinger''s cat out of the bag'
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 53
year: '2020'
...
---
_id: '7394'
article_processing_charge: No
article_type: letter_note
author:
- first_name: Eva
full_name: Benková, Eva
id: 38F4F166-F248-11E8-B48F-1D18A9856A87
last_name: Benková
orcid: 0000-0002-8510-9739
- first_name: Yasin
full_name: Dagdas, Yasin
last_name: Dagdas
citation:
ama: 'Benková E, Dagdas Y. Editorial overview: Cell biology in the era of omics?
Current Opinion in Plant Biology. 2019;52(12):A1-A2. doi:10.1016/j.pbi.2019.11.002'
apa: 'Benková, E., & Dagdas, Y. (2019). Editorial overview: Cell biology in
the era of omics? Current Opinion in Plant Biology. Elsevier. https://doi.org/10.1016/j.pbi.2019.11.002'
chicago: 'Benková, Eva, and Yasin Dagdas. “Editorial Overview: Cell Biology in the
Era of Omics?” Current Opinion in Plant Biology. Elsevier, 2019. https://doi.org/10.1016/j.pbi.2019.11.002.'
ieee: 'E. Benková and Y. Dagdas, “Editorial overview: Cell biology in the era of
omics?,” Current Opinion in Plant Biology, vol. 52, no. 12. Elsevier, pp.
A1–A2, 2019.'
ista: 'Benková E, Dagdas Y. 2019. Editorial overview: Cell biology in the era of
omics? Current Opinion in Plant Biology. 52(12), A1–A2.'
mla: 'Benková, Eva, and Yasin Dagdas. “Editorial Overview: Cell Biology in the Era
of Omics?” Current Opinion in Plant Biology, vol. 52, no. 12, Elsevier,
2019, pp. A1–2, doi:10.1016/j.pbi.2019.11.002.'
short: E. Benková, Y. Dagdas, Current Opinion in Plant Biology 52 (2019) A1–A2.
date_created: 2020-01-29T16:00:07Z
date_published: 2019-12-01T00:00:00Z
date_updated: 2023-09-07T14:56:55Z
day: '01'
department:
- _id: EvBe
doi: 10.1016/j.pbi.2019.11.002
external_id:
isi:
- '000502890600001'
pmid:
- '31787165'
intvolume: ' 52'
isi: 1
issue: '12'
language:
- iso: eng
month: '12'
oa_version: None
page: A1-A2
pmid: 1
publication: Current Opinion in Plant Biology
publication_identifier:
issn:
- 1369-5266
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Editorial overview: Cell biology in the era of omics?'
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 52
year: '2019'
...
---
_id: '6943'
abstract:
- lang: eng
text: Plants as sessile organisms are constantly under attack by herbivores, rough
environmental situations, or mechanical pressure. These challenges often lead
to the induction of wounds or destruction of already specified and developed tissues.
Additionally, wounding makes plants vulnerable to invasion by pathogens, which
is why wound signalling often triggers specific defence responses. To stay competitive
or, eventually, survive under these circumstances, plants need to regenerate efficiently,
which in rigid, tissue migration-incompatible plant tissues requires post-embryonic
patterning and organogenesis. Now, several studies used laser-assisted single
cell ablation in the Arabidopsis root tip as a minimal wounding proxy. Here, we
discuss their findings and put them into context of a broader spectrum of wound
signalling, pathogen responses and tissue as well as organ regeneration.
article_processing_charge: No
article_type: original
author:
- first_name: Lukas
full_name: Hörmayer, Lukas
id: 2EEE7A2A-F248-11E8-B48F-1D18A9856A87
last_name: Hörmayer
orcid: 0000-0001-8295-2926
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
citation:
ama: Hörmayer L, Friml J. Targeted cell ablation-based insights into wound healing
and restorative patterning. Current Opinion in Plant Biology. 2019;52:124-130.
doi:10.1016/j.pbi.2019.08.006
apa: Hörmayer, L., & Friml, J. (2019). Targeted cell ablation-based insights
into wound healing and restorative patterning. Current Opinion in Plant Biology.
Elsevier. https://doi.org/10.1016/j.pbi.2019.08.006
chicago: Hörmayer, Lukas, and Jiří Friml. “Targeted Cell Ablation-Based Insights
into Wound Healing and Restorative Patterning.” Current Opinion in Plant Biology.
Elsevier, 2019. https://doi.org/10.1016/j.pbi.2019.08.006.
ieee: L. Hörmayer and J. Friml, “Targeted cell ablation-based insights into wound
healing and restorative patterning,” Current Opinion in Plant Biology,
vol. 52. Elsevier, pp. 124–130, 2019.
ista: Hörmayer L, Friml J. 2019. Targeted cell ablation-based insights into wound
healing and restorative patterning. Current Opinion in Plant Biology. 52, 124–130.
mla: Hörmayer, Lukas, and Jiří Friml. “Targeted Cell Ablation-Based Insights into
Wound Healing and Restorative Patterning.” Current Opinion in Plant Biology,
vol. 52, Elsevier, 2019, pp. 124–30, doi:10.1016/j.pbi.2019.08.006.
short: L. Hörmayer, J. Friml, Current Opinion in Plant Biology 52 (2019) 124–130.
corr_author: '1'
date_created: 2019-10-14T07:00:24Z
date_published: 2019-12-01T00:00:00Z
date_updated: 2026-04-29T22:30:38Z
day: '01'
ddc:
- '580'
department:
- _id: JiFr
doi: 10.1016/j.pbi.2019.08.006
ec_funded: 1
external_id:
isi:
- '000502890600017'
pmid:
- '31585333'
file:
- access_level: open_access
checksum: d6fd68a6e965f1efe3f0bf2d2070a616
content_type: application/pdf
creator: dernst
date_created: 2019-10-14T14:48:21Z
date_updated: 2020-07-14T12:47:45Z
file_id: '6946'
file_name: 2019_CurrentOpinionPlant_Hoermayer.pdf
file_size: 1659288
relation: main_file
file_date_updated: 2020-07-14T12:47:45Z
has_accepted_license: '1'
intvolume: ' 52'
isi: 1
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
page: 124-130
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: Current Opinion in Plant Biology
publication_identifier:
issn:
- 1369-5266
publication_status: published
publisher: Elsevier
quality_controlled: '1'
related_material:
record:
- id: '9992'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Targeted cell ablation-based insights into wound healing and restorative patterning
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: 52
year: '2019'
...
---
_id: '9537'
abstract:
- lang: eng
text: DNA methylation is an ancient process found in all domains of life. Although
the enzymes that mediate methylation have remained highly conserved, DNA methylation
has been adapted for a variety of uses throughout evolution, including defense
against transposable elements and control of gene expression. Defects in DNA methylation
are linked to human diseases, including cancer. Methylation has been lost several
times in the course of animal and fungal evolution, thus limiting the opportunity
for study in common model organisms. In the past decade, plants have emerged as
a premier model system for genetic dissection of DNA methylation. A recent combination
of plant genetics with powerful genomic approaches has led to a number of exciting
discoveries and promises many more.
article_processing_charge: No
article_type: review
author:
- first_name: Daniel
full_name: Zilberman, Daniel
id: 6973db13-dd5f-11ea-814e-b3e5455e9ed1
last_name: Zilberman
orcid: 0000-0002-0123-8649
citation:
ama: Zilberman D. The evolving functions of DNA methylation. Current Opinion
in Plant Biology. 2008;11(5):554-559. doi:10.1016/j.pbi.2008.07.004
apa: Zilberman, D. (2008). The evolving functions of DNA methylation. Current
Opinion in Plant Biology. Elsevier . https://doi.org/10.1016/j.pbi.2008.07.004
chicago: Zilberman, Daniel. “The Evolving Functions of DNA Methylation.” Current
Opinion in Plant Biology. Elsevier , 2008. https://doi.org/10.1016/j.pbi.2008.07.004.
ieee: D. Zilberman, “The evolving functions of DNA methylation,” Current Opinion
in Plant Biology, vol. 11, no. 5. Elsevier , pp. 554–559, 2008.
ista: Zilberman D. 2008. The evolving functions of DNA methylation. Current Opinion
in Plant Biology. 11(5), 554–559.
mla: Zilberman, Daniel. “The Evolving Functions of DNA Methylation.” Current
Opinion in Plant Biology, vol. 11, no. 5, Elsevier , 2008, pp. 554–59, doi:10.1016/j.pbi.2008.07.004.
short: D. Zilberman, Current Opinion in Plant Biology 11 (2008) 554–559.
date_created: 2021-06-08T13:13:37Z
date_published: 2008-10-01T00:00:00Z
date_updated: 2021-12-14T08:54:07Z
department:
- _id: DaZi
doi: 10.1016/j.pbi.2008.07.004
extern: '1'
external_id:
pmid:
- '18774331'
intvolume: ' 11'
issue: '5'
language:
- iso: eng
month: '10'
oa_version: None
page: 554-559
pmid: 1
publication: Current Opinion in Plant Biology
publication_identifier:
issn:
- 1369-5266
publication_status: published
publisher: 'Elsevier '
quality_controlled: '1'
scopus_import: '1'
status: public
title: The evolving functions of DNA methylation
type: journal_article
user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9
volume: 11
year: '2008'
...