The plant hormone ethylene restricts Arabidopsis growth via the epidermis.

Autor:	Vaseva II; Laboratory of Functional Plant Biology, Department of Biology, Ghent University, B-9000 Ghent, Belgium., Qudeimat E; Laboratory of Functional Plant Biology, Department of Biology, Ghent University, B-9000 Ghent, Belgium., Potuschak T; Institut de Biologie Moléculaire des Plantes du CNRS, IBMP-CNRS-Unité Propre de Recherche 2357, Strasbourg, France., Du Y; Laboratory of Functional Plant Biology, Department of Biology, Ghent University, B-9000 Ghent, Belgium., Genschik P; Institut de Biologie Moléculaire des Plantes du CNRS, IBMP-CNRS-Unité Propre de Recherche 2357, Strasbourg, France., Vandenbussche F; Laboratory of Functional Plant Biology, Department of Biology, Ghent University, B-9000 Ghent, Belgium., Van Der Straeten D; Laboratory of Functional Plant Biology, Department of Biology, Ghent University, B-9000 Ghent, Belgium; dominique.vanderstraeten@ugent.be.
Jazyk:	angličtina
Zdroj:	Proceedings of the National Academy of Sciences of the United States of America [Proc Natl Acad Sci U S A] 2018 Apr 24; Vol. 115 (17), pp. E4130-E4139. Date of Electronic Publication: 2018 Apr 11.
DOI:	10.1073/pnas.1717649115
Abstrakt:	The gaseous hormone ethylene plays a key role in plant growth and development, and it is a major regulator of stress responses. It inhibits vegetative growth by restricting cell elongation, mainly through cross-talk with auxins. However, it remains unknown whether ethylene controls growth throughout all plant tissues or whether its signaling is confined to specific cell types. We employed a targeted expression approach to map the tissue site(s) of ethylene growth regulation. The ubiquitin E3 ligase complex containing Skp1, Cullin1, and the F-box protein EBF1 or EBF2 (SCF EBF1/2 ) target the degradation of EIN3, the master transcription factor in ethylene signaling. We coupled EBF1 and EBF2 to a number of cell type-specific promoters. Using phenotypic assays for ethylene response and mutant complementation, we revealed that the epidermis is the main site of ethylene action controlling plant growth in both roots and shoots. Suppression of ethylene signaling in the epidermis of the constitutive ethylene signaling mutant ctr1-1 was sufficient to rescue the mutant phenotype, pointing to the epidermis as a key cell type required for ethylene-mediated growth inhibition. Competing Interests: The authors declare no conflict of interest. (Copyright © 2018 the Author(s). Published by PNAS.)
Databáze:	MEDLINE
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