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Poplar trees for phytoremediation of high levels of nitrate and applications in bioenergy.

Identifieur interne : 001718 ( Main/Exploration ); précédent : 001717; suivant : 001719

Poplar trees for phytoremediation of high levels of nitrate and applications in bioenergy.

Auteurs : Vanessa Castro-Rodríguez [Espagne] ; Angel García-Gutiérrez [Espagne] ; Javier Canales [Espagne] ; Rafael A. Ca As [Espagne] ; Edward G. Kirby [États-Unis] ; Concepci N Avila [Espagne] ; Francisco M. Cánovas [Espagne]

Source :

RBID : pubmed:25923308

Descripteurs français

English descriptors

Abstract

The utilization of high amounts of nitrate fertilizers for crop yield leads to nitrate pollution of ground and surface waters. In this study, we report the assimilation and utilization of nitrate luxuriant levels, 20 times more than the highest N fertilizer application in Europe, by transgenic poplars overexpressing a cytosolic glutamine synthetase (GS1). In comparison with the wild-type controls, transgenic plants grown under high N levels exhibited increased biomass (171.6%) and accumulated higher levels of proteins, chlorophylls and total sugars such as glucose, fructose and sucrose. These plants also exhibited greater nitrogen-use efficiency particularly in young leaves, suggesting that they are able to translocate most of the resources to the above-ground part of the plant to produce biomass. The transgenic poplar transcriptome was greatly affected in response to N availability with 1237 genes differentially regulated in high N, while only 632 genes were differentially expressed in untransformed plants. Many of these genes are essential in the adaptation and response against N excess and include those involved in photosynthesis, cell wall formation and phenylpropanoid biosynthesis. Cellulose production in the transgenic plants was fivefold higher than in control plants, indicating that transgenic poplars represent a potential feedstock for applications in bioenergy. In conclusion, our results show that GS transgenic poplars can be used not only for improving growth and biomass production but also as an important resource for potential phytoremediation of nitrate pollution.

DOI: 10.1111/pbi.12384
PubMed: 25923308


Affiliations:


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Le document en format XML

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<term>Biofuels (MeSH)</term>
<term>Biomass (MeSH)</term>
<term>Carbohydrate Metabolism (drug effects)</term>
<term>Carbohydrate Metabolism (genetics)</term>
<term>Carbon (metabolism)</term>
<term>Chlorophyll (metabolism)</term>
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<term>Plant Proteins (metabolism)</term>
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<term>Populus (genetics)</term>
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<term>Azote (métabolisme)</term>
<term>Azote (pharmacologie)</term>
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<term>Populus (métabolisme)</term>
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<term>Protéines végétales (métabolisme)</term>
<term>Reproductibilité des résultats (MeSH)</term>
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<term>Végétaux génétiquement modifiés (MeSH)</term>
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<term>Métabolisme glucidique</term>
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<term>Trees</term>
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<div type="abstract" xml:lang="en">The utilization of high amounts of nitrate fertilizers for crop yield leads to nitrate pollution of ground and surface waters. In this study, we report the assimilation and utilization of nitrate luxuriant levels, 20 times more than the highest N fertilizer application in Europe, by transgenic poplars overexpressing a cytosolic glutamine synthetase (GS1). In comparison with the wild-type controls, transgenic plants grown under high N levels exhibited increased biomass (171.6%) and accumulated higher levels of proteins, chlorophylls and total sugars such as glucose, fructose and sucrose. These plants also exhibited greater nitrogen-use efficiency particularly in young leaves, suggesting that they are able to translocate most of the resources to the above-ground part of the plant to produce biomass. The transgenic poplar transcriptome was greatly affected in response to N availability with 1237 genes differentially regulated in high N, while only 632 genes were differentially expressed in untransformed plants. Many of these genes are essential in the adaptation and response against N excess and include those involved in photosynthesis, cell wall formation and phenylpropanoid biosynthesis. Cellulose production in the transgenic plants was fivefold higher than in control plants, indicating that transgenic poplars represent a potential feedstock for applications in bioenergy. In conclusion, our results show that GS transgenic poplars can be used not only for improving growth and biomass production but also as an important resource for potential phytoremediation of nitrate pollution. </div>
</front>
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</ArticleDate>
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<Country>England</Country>
<MedlineTA>Plant Biotechnol J</MedlineTA>
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<DescriptorName UI="D008031" MajorTopicYN="N">Lignin</DescriptorName>
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</MeshHeading>
<MeshHeading>
<DescriptorName UI="D009584" MajorTopicYN="N">Nitrogen</DescriptorName>
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<MeshHeading>
<DescriptorName UI="D030821" MajorTopicYN="N">Plants, Genetically Modified</DescriptorName>
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<MeshHeading>
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<MeshHeading>
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</MeshHeadingList>
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<Keyword MajorTopicYN="N">bioenergy</Keyword>
<Keyword MajorTopicYN="N">biomass</Keyword>
<Keyword MajorTopicYN="N">glutamine synthetase</Keyword>
<Keyword MajorTopicYN="N">nitrate pollution</Keyword>
<Keyword MajorTopicYN="N">transgenic trees</Keyword>
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<PubMedPubDate PubStatus="revised">
<Year>2015</Year>
<Month>03</Month>
<Day>19</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="accepted">
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<ArticleId IdType="pubmed">25923308</ArticleId>
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<name sortKey="Avila, Concepci N" sort="Avila, Concepci N" uniqKey="Avila C" first="Concepci N" last="Avila">Concepci N Avila</name>
<name sortKey="Ca As, Rafael A" sort="Ca As, Rafael A" uniqKey="Ca As R" first="Rafael A" last="Ca As">Rafael A. Ca As</name>
<name sortKey="Canales, Javier" sort="Canales, Javier" uniqKey="Canales J" first="Javier" last="Canales">Javier Canales</name>
<name sortKey="Canovas, Francisco M" sort="Canovas, Francisco M" uniqKey="Canovas F" first="Francisco M" last="Cánovas">Francisco M. Cánovas</name>
<name sortKey="Garcia Gutierrez, Angel" sort="Garcia Gutierrez, Angel" uniqKey="Garcia Gutierrez A" first="Angel" last="García-Gutiérrez">Angel García-Gutiérrez</name>
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<region name="New Jersey">
<name sortKey="Kirby, Edward G" sort="Kirby, Edward G" uniqKey="Kirby E" first="Edward G" last="Kirby">Edward G. Kirby</name>
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