A regulatory module controlling GA-mediated endosperm cell expansion is critical for seed germination in Arabidopsis

Sánchez Montesinos, Rocío and Bouza Morcillo, Laura and Marquez, Julietta and Ghita, Melania and Duran-Nebreda, Salva and Gómez Fernández, Luis and Holdsworth, Michael J. and Bassel, George and Oñate Sanchez, Luis (2018). A regulatory module controlling GA-mediated endosperm cell expansion is critical for seed germination in Arabidopsis. "Molecular Plant" ; ISSN 1674-2052. https://doi.org/10.1016/j.molp.2018.10.009.

Description

Title: A regulatory module controlling GA-mediated endosperm cell expansion is critical for seed germination in Arabidopsis
Author/s:
  • Sánchez Montesinos, Rocío
  • Bouza Morcillo, Laura
  • Marquez, Julietta
  • Ghita, Melania
  • Duran-Nebreda, Salva
  • Gómez Fernández, Luis
  • Holdsworth, Michael J.
  • Bassel, George
  • Oñate Sanchez, Luis
Item Type: Article
Título de Revista/Publicación: Molecular Plant
Date: 2018
ISSN: 1674-2052
Subjects:
Freetext Keywords: cell expansion; cell wall remodelling enzymes; endosperm; expansin; NAC transcription factors; seed germination
Faculty: Centro de Investigación en Biotecnología y Genómica de Plantas (CBGP) (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

A key component of seed germination is the interplay of mechanical forces governing embryo growth and the surrounding restraining endosperm tissue. Endosperm cell separation is therefore thought to play a critical role in the control of this developmental transition. Here we demonstrate that in Arabidopsis thaliana seeds, endosperm cell expansion is a key component of germination. Endosperm cells expand to accommodate embryo growth prior to germination. We show that this is an actively regulated process supported by spatiotemporal control of the cell expansion gene EXPANSIN 2 ( EXPA2). The NAC transcription factors NAC25 and NAC1L were identified as upstream regulatory effectors of EXPA2 expression, GA-mediated endosperm expansion and seed germination. The DELLA protein RGL2 repressed activation of EXPA2 promoter by NAC. Our findings demonstrate a key role of this gene network in regulating endosperm cell-expansion to control the seed to seedling transition.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainBIO2013-46076-RUnspecifiedUnspecifiedEstudio de la señalización por giberelinas para mejorar la germinación de las semillas y la resistencia al estrés
Government of SpainBIO2016-77840-RUnspecifiedUnspecifiedGenes que regulan la germinación de las semillas y el crecimiento de arabidopsis como herramientas para mejorar la producción de biomasa y el rendimiento de las cosechas

More information

Item ID: 53140
DC Identifier: http://oa.upm.es/53140/
OAI Identifier: oai:oa.upm.es:53140
DOI: 10.1016/j.molp.2018.10.009
Official URL: https://www.sciencedirect.com/science/article/pii/S1674205218303356
Deposited by: Memoria Investigacion
Deposited on: 11 Dec 2018 15:05
Last Modified: 01 Dec 2019 23:30
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