Targeted cell elimination reveals an auxin-guided biphasic mode of lateral root initiation.

Details

Serval ID
serval:BIB_786F1289BE16
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Targeted cell elimination reveals an auxin-guided biphasic mode of lateral root initiation.
Journal
Genes and Development
Author(s)
Marhavý P., Montesinos J.C., Abuzeineh A., Van Damme D., Vermeer J.E., Duclercq J., Rakusová H., Nováková P., Friml J., Geldner N., Benková E.
ISSN
1549-5477 (Electronic)
ISSN-L
0890-9369
Publication state
Published
Issued date
2016
Peer-reviewed
Oui
Volume
30
Number
4
Pages
471-483
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Abstract
To sustain a lifelong ability to initiate organs, plants retain pools of undifferentiated cells with a preserved proliferation capacity. The root pericycle represents a unique tissue with conditional meristematic activity, and its tight control determines initiation of lateral organs. Here we show that the meristematic activity of the pericycle is constrained by the interaction with the adjacent endodermis. Release of these restraints by elimination of endodermal cells by single-cell ablation triggers the pericycle to re-enter the cell cycle. We found that endodermis removal substitutes for the phytohormone auxin-dependent initiation of the pericycle meristematic activity. However, auxin is indispensable to steer the cell division plane orientation of new organ-defining divisions. We propose a dual, spatiotemporally distinct role for auxin during lateral root initiation. In the endodermis, auxin releases constraints arising from cell-to-cell interactions that compromise the pericycle meristematic activity, whereas, in the pericycle, auxin defines the orientation of the cell division plane to initiate lateral roots.
Keywords
Ablation Techniques, Arabidopsis/cytology, Arabidopsis/genetics, Cell Communication, Cell Division, Gene Expression Regulation, Plant, Indoleacetic Acids/metabolism, Meristem/metabolism, Plant Roots/cytology, Plant Roots/growth & development, Protein Transport, Signal Transduction
Pubmed
Web of science
Create date
20/02/2016 16:29
Last modification date
20/08/2019 14:35
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