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Growth-regulating factor 15 is required for leaf size control in Populus.

Identifieur interne : 000920 ( Main/Exploration ); précédent : 000919; suivant : 000921

Growth-regulating factor 15 is required for leaf size control in Populus.

Auteurs : Houjun Zhou [République populaire de Chine] ; Xueqin Song [République populaire de Chine] ; Kaili Wei [République populaire de Chine] ; Yanqiu Zhao [République populaire de Chine] ; Cheng Jiang [République populaire de Chine] ; Jinnan Wang [République populaire de Chine] ; Fang Tang [République populaire de Chine] ; Mengzhu Lu [République populaire de Chine]

Source :

RBID : pubmed:30307572

Descripteurs français

English descriptors

Abstract

Growth-regulating factors (GRFs) are involved in various developmental events, particularly leaf development. However, the functions of GRFs in woody plants remain elusive. In this study, functional characterization of GRF15 in Populus was performed. Most GRFs are preferentially expressed in young leaves. As GRF15 was expressed at the highest level and with highest ratio in Populus species with large leaves, this gene was investigated through transgenic analyses. Promotor-β-glucuronidase analysis revealed expression of GRF15 at the leaf expansion zone. Additionally, GRF15 was found to be localized in the nucleus and regulated by miR396. Leaf size and palisade cell size were significantly increased and decreased in GRF15-overexpressing and dominant repression lines, respectively. Consistently, expression of EXPA11a, a homolog of cell-expansion marker EXPA11 in Arabidopsis, was strongly upregulated and downregulated in the GRF15-overexpressing and dominant repression lines, respectively, which was further manifested by activation of EXPA11a by GRF15 in transactivation assays. Therefore, GRF15 is required for leaf size control and primarily modulates cell expansion during leaf development in Populus.

DOI: 10.1093/treephys/tpy107
PubMed: 30307572


Affiliations:


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Le document en format XML

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<term>Arabidopsis (genetics)</term>
<term>Arabidopsis (growth & development)</term>
<term>Gene Expression Regulation, Plant (genetics)</term>
<term>Plant Growth Regulators (genetics)</term>
<term>Plant Leaves (genetics)</term>
<term>Plant Leaves (growth & development)</term>
<term>Plant Proteins (genetics)</term>
<term>Plant Proteins (metabolism)</term>
<term>Plants, Genetically Modified (genetics)</term>
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<term>Populus (genetics)</term>
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<term>Arabidopsis (génétique)</term>
<term>Facteur de croissance végétal (génétique)</term>
<term>Feuilles de plante (croissance et développement)</term>
<term>Feuilles de plante (génétique)</term>
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<term>Populus (génétique)</term>
<term>Protéines végétales (génétique)</term>
<term>Protéines végétales (métabolisme)</term>
<term>Régulation de l'expression des gènes végétaux (génétique)</term>
<term>Végétaux génétiquement modifiés (croissance et développement)</term>
<term>Végétaux génétiquement modifiés (génétique)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="genetics" xml:lang="en">
<term>Plant Growth Regulators</term>
<term>Plant Proteins</term>
</keywords>
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<term>Arabidopsis</term>
<term>Feuilles de plante</term>
<term>Populus</term>
<term>Végétaux génétiquement modifiés</term>
</keywords>
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<term>Arabidopsis</term>
<term>Gene Expression Regulation, Plant</term>
<term>Plant Leaves</term>
<term>Plants, Genetically Modified</term>
<term>Populus</term>
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<term>Arabidopsis</term>
<term>Plant Leaves</term>
<term>Plants, Genetically Modified</term>
<term>Populus</term>
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<term>Arabidopsis</term>
<term>Facteur de croissance végétal</term>
<term>Feuilles de plante</term>
<term>Populus</term>
<term>Protéines végétales</term>
<term>Régulation de l'expression des gènes végétaux</term>
<term>Végétaux génétiquement modifiés</term>
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<term>Plant Proteins</term>
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<term>Protéines végétales</term>
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<div type="abstract" xml:lang="en">Growth-regulating factors (GRFs) are involved in various developmental events, particularly leaf development. However, the functions of GRFs in woody plants remain elusive. In this study, functional characterization of GRF15 in Populus was performed. Most GRFs are preferentially expressed in young leaves. As GRF15 was expressed at the highest level and with highest ratio in Populus species with large leaves, this gene was investigated through transgenic analyses. Promotor-β-glucuronidase analysis revealed expression of GRF15 at the leaf expansion zone. Additionally, GRF15 was found to be localized in the nucleus and regulated by miR396. Leaf size and palisade cell size were significantly increased and decreased in GRF15-overexpressing and dominant repression lines, respectively. Consistently, expression of EXPA11a, a homolog of cell-expansion marker EXPA11 in Arabidopsis, was strongly upregulated and downregulated in the GRF15-overexpressing and dominant repression lines, respectively, which was further manifested by activation of EXPA11a by GRF15 in transactivation assays. Therefore, GRF15 is required for leaf size control and primarily modulates cell expansion during leaf development in Populus.</div>
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<Year>2019</Year>
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<ISSN IssnType="Electronic">1758-4469</ISSN>
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<Issue>3</Issue>
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<Year>2019</Year>
<Month>03</Month>
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<Title>Tree physiology</Title>
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<AbstractText>Growth-regulating factors (GRFs) are involved in various developmental events, particularly leaf development. However, the functions of GRFs in woody plants remain elusive. In this study, functional characterization of GRF15 in Populus was performed. Most GRFs are preferentially expressed in young leaves. As GRF15 was expressed at the highest level and with highest ratio in Populus species with large leaves, this gene was investigated through transgenic analyses. Promotor-β-glucuronidase analysis revealed expression of GRF15 at the leaf expansion zone. Additionally, GRF15 was found to be localized in the nucleus and regulated by miR396. Leaf size and palisade cell size were significantly increased and decreased in GRF15-overexpressing and dominant repression lines, respectively. Consistently, expression of EXPA11a, a homolog of cell-expansion marker EXPA11 in Arabidopsis, was strongly upregulated and downregulated in the GRF15-overexpressing and dominant repression lines, respectively, which was further manifested by activation of EXPA11a by GRF15 in transactivation assays. Therefore, GRF15 is required for leaf size control and primarily modulates cell expansion during leaf development in Populus.</AbstractText>
<CopyrightInformation>© The Author(s) 2018. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.</CopyrightInformation>
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<Affiliation>State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China.</Affiliation>
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<Affiliation>Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China.</Affiliation>
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<Affiliation>Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China.</Affiliation>
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<AffiliationInfo>
<Affiliation>Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Jiangsu, China.</Affiliation>
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