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Evaluation, characterization, expression profiling, and functional analysis of DXS and DXR genes of Populus trichocarpa.

Identifieur interne : 000978 ( Main/Exploration ); précédent : 000977; suivant : 000979

Evaluation, characterization, expression profiling, and functional analysis of DXS and DXR genes of Populus trichocarpa.

Auteurs : Chen Xu [République populaire de Chine] ; Hui Wei [République populaire de Chine] ; Ali Movahedi [République populaire de Chine] ; Weibo Sun [République populaire de Chine] ; Xiaoxing Ma [République populaire de Chine] ; Dawei Li [République populaire de Chine] ; Tongming Yin [République populaire de Chine] ; Qiang Zhuge [République populaire de Chine]

Source :

RBID : pubmed:31279136

Descripteurs français

English descriptors

Abstract

1-Deoxy-D-xylulose-5-phosphate synthasse (DXS) and 1-deoxy-D-xylulose-5-phosphate reductoisomerase (DXR) are key enzymes in terpenoid biosynthesis. DXS catalyzes the formation of 1-deoxy-D-xylulose 5-phosphate (DXP) from pyruvate and D-glyceraldehyde-3-phosphate. DXR catalyzes the formation of 2-C-methyl-D-erythritol 4-phosphate (MEP) from DXP. Previous studies of the DXS and DXR genes have focused on herbs, such as Arabidopsis thaliana, Salvia miltiorrhiza, and Amomum villosum, but few studies have been conducted on woody plants. For that reason, we chose Populus trichocarpa as a model woody plant for investigating the DXS and DXR genes. PtDXS exhibited the highest expression level in leaves and the lowest expression in roots. PtDXR showed maximum expression in young leaves, and the lowest expression in mature leaves. The expression profiles revealed by RT-PCR following different elicitor treatments such as abscisic acid, NaCl, PEG6000, H2O2, and cold stress showed that PtDXS and PtDXR were elicitor-responsive genes. Our results showed that the PtDXS gene exhibited diurnal changes, but PtDXR did not. Moreover, overexpression of PtDXR in transgenic poplars improved tolerance to abiotic and biotic stresses. Those results showed that the PtDXR encoded a functional protein, and widely participates in plant growth and development, stress physiological process.

DOI: 10.1016/j.plaphy.2019.05.034
PubMed: 31279136


Affiliations:


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<term>Aldose-Ketose Isomerases (metabolism)</term>
<term>Circadian Rhythm (MeSH)</term>
<term>Droughts (MeSH)</term>
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<term>Transferases (metabolism)</term>
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<term>Aldose-ketose isomerases (métabolisme)</term>
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<term>Transferases (métabolisme)</term>
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<term>Saccharomycetales</term>
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<term>Acide abscissique</term>
<term>Chlorure de sodium</term>
<term>Peroxyde d'hydrogène</term>
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<div type="abstract" xml:lang="en">1-Deoxy-D-xylulose-5-phosphate synthasse (DXS) and 1-deoxy-D-xylulose-5-phosphate reductoisomerase (DXR) are key enzymes in terpenoid biosynthesis. DXS catalyzes the formation of 1-deoxy-D-xylulose 5-phosphate (DXP) from pyruvate and D-glyceraldehyde-3-phosphate. DXR catalyzes the formation of 2-C-methyl-D-erythritol 4-phosphate (MEP) from DXP. Previous studies of the DXS and DXR genes have focused on herbs, such as Arabidopsis thaliana, Salvia miltiorrhiza, and Amomum villosum, but few studies have been conducted on woody plants. For that reason, we chose Populus trichocarpa as a model woody plant for investigating the DXS and DXR genes. PtDXS exhibited the highest expression level in leaves and the lowest expression in roots. PtDXR showed maximum expression in young leaves, and the lowest expression in mature leaves. The expression profiles revealed by RT-PCR following different elicitor treatments such as abscisic acid, NaCl, PEG
<sub>6000</sub>
, H
<sub>2</sub>
O
<sub>2</sub>
, and cold stress showed that PtDXS and PtDXR were elicitor-responsive genes. Our results showed that the PtDXS gene exhibited diurnal changes, but PtDXR did not. Moreover, overexpression of PtDXR in transgenic poplars improved tolerance to abiotic and biotic stresses. Those results showed that the PtDXR encoded a functional protein, and widely participates in plant growth and development, stress physiological process.</div>
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<Abstract>
<AbstractText>1-Deoxy-D-xylulose-5-phosphate synthasse (DXS) and 1-deoxy-D-xylulose-5-phosphate reductoisomerase (DXR) are key enzymes in terpenoid biosynthesis. DXS catalyzes the formation of 1-deoxy-D-xylulose 5-phosphate (DXP) from pyruvate and D-glyceraldehyde-3-phosphate. DXR catalyzes the formation of 2-C-methyl-D-erythritol 4-phosphate (MEP) from DXP. Previous studies of the DXS and DXR genes have focused on herbs, such as Arabidopsis thaliana, Salvia miltiorrhiza, and Amomum villosum, but few studies have been conducted on woody plants. For that reason, we chose Populus trichocarpa as a model woody plant for investigating the DXS and DXR genes. PtDXS exhibited the highest expression level in leaves and the lowest expression in roots. PtDXR showed maximum expression in young leaves, and the lowest expression in mature leaves. The expression profiles revealed by RT-PCR following different elicitor treatments such as abscisic acid, NaCl, PEG
<sub>6000</sub>
, H
<sub>2</sub>
O
<sub>2</sub>
, and cold stress showed that PtDXS and PtDXR were elicitor-responsive genes. Our results showed that the PtDXS gene exhibited diurnal changes, but PtDXR did not. Moreover, overexpression of PtDXR in transgenic poplars improved tolerance to abiotic and biotic stresses. Those results showed that the PtDXR encoded a functional protein, and widely participates in plant growth and development, stress physiological process.</AbstractText>
<CopyrightInformation>Copyright © 2019 Elsevier Masson SAS. All rights reserved.</CopyrightInformation>
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<MeshHeading>
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<QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName>
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<Keyword MajorTopicYN="N">DXS</Keyword>
<Keyword MajorTopicYN="N">Expression</Keyword>
<Keyword MajorTopicYN="N">HPLC–MS/MS</Keyword>
<Keyword MajorTopicYN="N">Populus trichocarpa</Keyword>
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<Year>2019</Year>
<Month>05</Month>
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<li>République populaire de Chine</li>
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<name sortKey="Movahedi, Ali" sort="Movahedi, Ali" uniqKey="Movahedi A" first="Ali" last="Movahedi">Ali Movahedi</name>
<name sortKey="Sun, Weibo" sort="Sun, Weibo" uniqKey="Sun W" first="Weibo" last="Sun">Weibo Sun</name>
<name sortKey="Wei, Hui" sort="Wei, Hui" uniqKey="Wei H" first="Hui" last="Wei">Hui Wei</name>
<name sortKey="Yin, Tongming" sort="Yin, Tongming" uniqKey="Yin T" first="Tongming" last="Yin">Tongming Yin</name>
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