A Regulatory Module Controlling CA-Mediated Endosperm Cell Expansion Is Critical for Seed Germination in Arabidopsis
作者机构：Centro de Biotecnologia y Genomica de PlantasUniversidad Politecnica de Madrid-lnstituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria Campus de MontegancedoPozuelo de AlarconMaddd 28223Spain School of BiosciencesUniversity of NottinghamLoughborough LE12 5RDUK School of BiosciencesUniversity of BirminghamBirmingham B15 23-rUK Departamento de Sistemas y Recursos NaturalesE.T.S.I.MontesForestal y del Medio NaturalCampus de Moncloa28040 MadridSpain
出 版 物：《Molecular Plant》 (分子植物（英文版）)
年 卷 期：2019年第12卷第1期
页 面：71-85页
核心收录：
学科分类：0710[理学-生物学] 07[理学] 09[农学]
基 金：supported with grants to L.O.-S by the Spanish Ministry of Economy and Competitiveness by the Biotechnology and Biological Sciences Research Council the Leverhulme Trust grant RPG- 2016-049 to G.B. together with S.D.-N
主 题：cell expansion cell-wall remodeling enzymes endosperm expansin NAC transcription factors seed germination
摘 要：A key component of seed germination is the interplay of mechanical forces governing embryo growth and the surrounding restraining endosperm *** cell separation is therefore thought to play a critical role in the control of this developmental *** we demonstrate that in Arabidopsis thaliana seeds,endosperm cell expansion is a key component of *** cells expand to accommodate embryo growth prior to *** 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 NACIL were identified as upstream regulators of EXPA2 expression,gibbereliinmediated endosperm expansion,and seed *** DELLA protein RGL2 repressed activation of the EXPA2 promoter by NAC25/*** together,our findings uncover a key role of the GA/ DELLA-NAC25/NACIL-EXPA2 network in regulating endosperm cell expansion to control the seed-toseedling transition.
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