COP1 Mediates the Coordination of Root and Shoot Growth by Light Through Modulation of PIN1- and Pin2-Dependent Auxin Transport in ArabidoPsis

Authors

Massimiliano Sassi
Yanfen Lu
Yonghong Zhang, The University of Texas Rio Grande ValleyFollow
Juan Wang
Pankaj Dhonukshe
Ikram Blilou
Minqiu Dai
Juan Li
Ximing Gong
Yvon Jaillais
Xuhong Yu
Jan Traas
Ida Ruberti
Haiyang Wang
Ben Scheres
Teva Vernoux
Jian Xu

Document Type

Article

Publication Date

9-15-2012

Abstract

When a plant germinates in the soil, elongation of stem-like organs is enhanced whereas leaf and root growth is inhibited. How these differential growth responses are orchestrated by light and integrated at the organismal level to shape the plant remains to be elucidated. Here, we show that light signals through the master photomorphogenesis repressor COP1 to coordinate root and shoot growth in Arabidopsis. In the shoot, COP1 regulates shoot-to-root auxin transport by controlling the transcription of the auxin efflux carrier gene PIN-FORMED1 (PIN1), thus appropriately tuning shoot-derived auxin levels in the root. This in turn directly influences root elongation and adapts auxin transport and cell proliferation in the root apical meristem by modulating PIN1 and PIN2 intracellular distribution in the root in a COP1-dependent fashion, thus permitting a rapid and precise tuning of root growth to the light environment. Our data identify auxin as a long-distance signal in developmental adaptation to light and illustrate how spatially separated control mechanisms can converge on the same signaling system to coordinate development at the whole plant level.

Comments

© 2012 the authors. Original published version available at http://doi.org/10.1242/dev.078212

Recommended Citation

Mao, Y. (2012). Facile molten-salt synthesis of double perovskite La2BMnO6 nanoparticles. RSC Advances, 2(33), 12675–12678. https://doi.org/10.1039/C2RA21789A

First Page

3402

Last Page

3412

Publication Title

Development (Cambridge)

DOI

10.1242/dev.078212