---
_id: '6897'
abstract:
- lang: eng
text: The apical hook is a transiently formed structure that plays a protective
role when the germinating seedling penetrates through the soil towards the surface.
Crucial for proper bending is the local auxin maxima, which defines the concave
(inner) side of the hook curvature. As no sign of asymmetric auxin distribution
has been reported in embryonic hypocotyls prior to hook formation, the question
of how auxin asymmetry is established in the early phases of seedling germination
remains largely unanswered. Here, we analyzed the auxin distribution and expression
of PIN auxin efflux carriers from early phases of germination, and show that bending
of the root in response to gravity is the crucial initial cue that governs the
hypocotyl bending required for apical hook formation. Importantly, polar auxin
transport machinery is established gradually after germination starts as a result
of tight root-hypocotyl interaction and a proper balance between abscisic acid
and gibberellins.
acknowledged_ssus:
- _id: LifeSc
- _id: Bio
acknowledgement: "We thank Jiri Friml and Phillip Brewer for inspiring discussion
and for help in preparing the manuscript. This research was supported by the Scientific
Service Units (SSU) of IST-Austria through resources provided by the Bioimaging
Facility\r\n(BIF), the Life Science Facility (LSF).\r\nThis work was supported by
grants from the European Research Council (Starting Independent Research Grant ERC-2007-Stg-
207362-HCPO to E.B.). J.P. and M.S. received funds from European Regional Development
Fund-Project ‘Centre for Experimental Plant Biology’ (No. CZ.02.1.01/0.0/0.0/16_019/0000738)."
article_number: dev175919
article_processing_charge: No
article_type: original
author:
- first_name: Qiang
full_name: Zhu, Qiang
id: 40A4B9E6-F248-11E8-B48F-1D18A9856A87
last_name: Zhu
- first_name: Marçal
full_name: Gallemi, Marçal
id: 460C6802-F248-11E8-B48F-1D18A9856A87
last_name: Gallemi
orcid: 0000-0003-4675-6893
- first_name: Jiří
full_name: Pospíšil, Jiří
last_name: Pospíšil
- first_name: Petra
full_name: Žádníková, Petra
last_name: Žádníková
- first_name: Miroslav
full_name: Strnad, Miroslav
last_name: Strnad
- first_name: Eva
full_name: Benková, Eva
id: 38F4F166-F248-11E8-B48F-1D18A9856A87
last_name: Benková
orcid: 0000-0002-8510-9739
citation:
ama: Zhu Q, Gallemi M, Pospíšil J, Žádníková P, Strnad M, Benková E. Root gravity
response module guides differential growth determining both root bending and apical
hook formation in Arabidopsis. Development. 2019;146(17). doi:10.1242/dev.175919
apa: Zhu, Q., Gallemi, M., Pospíšil, J., Žádníková, P., Strnad, M., & Benková,
E. (2019). Root gravity response module guides differential growth determining
both root bending and apical hook formation in Arabidopsis. Development.
The Company of Biologists. https://doi.org/10.1242/dev.175919
chicago: Zhu, Qiang, Marçal Gallemi, Jiří Pospíšil, Petra Žádníková, Miroslav Strnad,
and Eva Benková. “Root Gravity Response Module Guides Differential Growth Determining
Both Root Bending and Apical Hook Formation in Arabidopsis.” Development.
The Company of Biologists, 2019. https://doi.org/10.1242/dev.175919.
ieee: Q. Zhu, M. Gallemi, J. Pospíšil, P. Žádníková, M. Strnad, and E. Benková,
“Root gravity response module guides differential growth determining both root
bending and apical hook formation in Arabidopsis,” Development, vol. 146,
no. 17. The Company of Biologists, 2019.
ista: Zhu Q, Gallemi M, Pospíšil J, Žádníková P, Strnad M, Benková E. 2019. Root
gravity response module guides differential growth determining both root bending
and apical hook formation in Arabidopsis. Development. 146(17), dev175919.
mla: Zhu, Qiang, et al. “Root Gravity Response Module Guides Differential Growth
Determining Both Root Bending and Apical Hook Formation in Arabidopsis.” Development,
vol. 146, no. 17, dev175919, The Company of Biologists, 2019, doi:10.1242/dev.175919.
short: Q. Zhu, M. Gallemi, J. Pospíšil, P. Žádníková, M. Strnad, E. Benková, Development
146 (2019).
date_created: 2019-09-22T22:00:36Z
date_published: 2019-09-12T00:00:00Z
date_updated: 2023-08-30T06:19:04Z
day: '12'
department:
- _id: EvBe
doi: 10.1242/dev.175919
ec_funded: 1
external_id:
isi:
- '000486297400011'
pmid:
- '31391194'
intvolume: ' 146'
isi: 1
issue: '17'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1242/dev.175919
month: '09'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: 253FCA6A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '207362'
name: Hormonal cross-talk in plant organogenesis
publication: Development
publication_identifier:
eissn:
- '14779129'
publication_status: published
publisher: The Company of Biologists
quality_controlled: '1'
scopus_import: '1'
status: public
title: Root gravity response module guides differential growth determining both root
bending and apical hook formation in Arabidopsis
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 146
year: '2019'
...