Guard cells control hypocotyl elongation through HXK1, HY5, and PIF4

Gilor Kelly; Danja Brandsma; Aiman Egbaria; Ofer Stein; Adi Doron-Faigenboim; Nitsan Lugassi; Eduard Belausov; Hanita Zemach; Felix Shaya; Nir Carmi; Nir Sade; David Granot

doi:10.1038/s42003-021-02283-y

Communications Biology (Jun 2021)

Guard cells control hypocotyl elongation through HXK1, HY5, and PIF4

Gilor Kelly,
Danja Brandsma,
Aiman Egbaria,
Ofer Stein,
Adi Doron-Faigenboim,
Nitsan Lugassi,
Eduard Belausov,
Hanita Zemach,
Felix Shaya,
Nir Carmi,
Nir Sade,
David Granot

Affiliations

Gilor Kelly: Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center
Danja Brandsma: Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center
Aiman Egbaria: School of Plant Science and Food Security, Tel Aviv University
Ofer Stein: Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center
Adi Doron-Faigenboim: Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center
Nitsan Lugassi: Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center
Eduard Belausov: Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center
Hanita Zemach: Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center
Felix Shaya: Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center
Nir Carmi: Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center
Nir Sade: School of Plant Science and Food Security, Tel Aviv University
David Granot: Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center

DOI: https://doi.org/10.1038/s42003-021-02283-y
Journal volume & issue: Vol. 4, no. 1
pp. 1 – 14

Abstract

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Kelly et al. show that Arabidopsis hexokinase1 (HXK1) expressed in guard-cells is sufficient to drive hypocotyl elongation through increasing the activity of PIF4 and auxin level, and competing with the effects of HY5. This study provides insights into how light and sucrose antagonistically coordinate the effort to achieve the height necessary for efficient photosynthetic, autotrophic sugar production.

Published in Communications Biology

ISSN: 2399-3642 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Science: Biology (General)
Website: https://www.nature.com/commsbio/

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