Drought tolerance of two black poplar (Populus nigra L.) clones: contribution of carbohydrates and oxidative stress defence.
Identifieur interne : 003655 ( Main/Exploration ); précédent : 003654; suivant : 003656Drought tolerance of two black poplar (Populus nigra L.) clones: contribution of carbohydrates and oxidative stress defence.
Auteurs : Nicole Regier [Suisse] ; Sebastian Streb ; Claudia Cocozza ; Marcus Schaub ; Paolo Cherubini ; Samuel C. Zeeman ; Beat FreySource :
- Plant, cell & environment [ 1365-3040 ] ; 2009.
Descripteurs français
- KwdFr :
- ARN des plantes (génétique), Eau (métabolisme), Espèces réactives de l'oxygène (métabolisme), Génotype (MeSH), Métabolisme glucidique (MeSH), Photosynthèse (MeSH), Phénotype (MeSH), Populus (génétique), Populus (métabolisme), Pousses de plante (métabolisme), Racines de plante (métabolisme), Régulation de l'expression des gènes végétaux (MeSH), Stomates de plante (métabolisme), Stress oxydatif (MeSH), Superoxide dismutase (métabolisme), Sécheresses (MeSH).
- MESH :
- génétique : ARN des plantes, Populus.
- métabolisme : Eau, Espèces réactives de l'oxygène, Populus, Pousses de plante, Racines de plante, Stomates de plante, Superoxide dismutase.
- Génotype, Métabolisme glucidique, Photosynthèse, Phénotype, Régulation de l'expression des gènes végétaux, Stress oxydatif, Sécheresses.
English descriptors
- KwdEn :
- Carbohydrate Metabolism (MeSH), Droughts (MeSH), Gene Expression Regulation, Plant (MeSH), Genotype (MeSH), Oxidative Stress (MeSH), Phenotype (MeSH), Photosynthesis (MeSH), Plant Roots (metabolism), Plant Shoots (metabolism), Plant Stomata (metabolism), Populus (genetics), Populus (metabolism), RNA, Plant (genetics), Reactive Oxygen Species (metabolism), Superoxide Dismutase (metabolism), Water (metabolism).
- MESH :
- chemical , genetics : RNA, Plant.
- genetics : Populus.
- metabolism : Plant Roots, Plant Shoots, Plant Stomata, Populus, Reactive Oxygen Species, Superoxide Dismutase, Water.
- Carbohydrate Metabolism, Droughts, Gene Expression Regulation, Plant, Genotype, Oxidative Stress, Phenotype, Photosynthesis.
Abstract
Drought is expected to become an increasingly important factor limiting tree growth caused by climate change. Two divergent clones of Populus nigra (58-861 and Poli) originating from contrasting environments were subjected to water limitation (WL) to elucidate whether they differ in tolerance to drought, which mechanisms to avoid stress they exhibit and whether drought has an impact on the interactions between roots and shoots. Limiting water availability caused photosynthetic rate and total non-structural carbohydrate (TNC) levels to decrease in 58-861. However, starch-degrading enzyme activity and gene expression were induced in roots, and soluble sugar levels were higher than in well-watered (WW) plants. These data suggest that assimilation and partitioning of carbon to the roots are decreased, resulting in mobilization of stored starch. In contrast, the photosynthetic rate of Poli was reduced only late in the treatment, and carbohydrate levels in WL plants were higher than in WW plants. Superoxide dismutase (SOD) activity and gene expression were higher in Poli than in 58-861, even in WW plants, leading to a higher capacity to defend against oxidative stress.
DOI: 10.1111/j.1365-3040.2009.02030.x
PubMed: 19671097
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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<author><name sortKey="Cocozza, Claudia" sort="Cocozza, Claudia" uniqKey="Cocozza C" first="Claudia" last="Cocozza">Claudia Cocozza</name>
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<term>Droughts (MeSH)</term>
<term>Gene Expression Regulation, Plant (MeSH)</term>
<term>Genotype (MeSH)</term>
<term>Oxidative Stress (MeSH)</term>
<term>Phenotype (MeSH)</term>
<term>Photosynthesis (MeSH)</term>
<term>Plant Roots (metabolism)</term>
<term>Plant Shoots (metabolism)</term>
<term>Plant Stomata (metabolism)</term>
<term>Populus (genetics)</term>
<term>Populus (metabolism)</term>
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<term>Génotype (MeSH)</term>
<term>Métabolisme glucidique (MeSH)</term>
<term>Photosynthèse (MeSH)</term>
<term>Phénotype (MeSH)</term>
<term>Populus (génétique)</term>
<term>Populus (métabolisme)</term>
<term>Pousses de plante (métabolisme)</term>
<term>Racines de plante (métabolisme)</term>
<term>Régulation de l'expression des gènes végétaux (MeSH)</term>
<term>Stomates de plante (métabolisme)</term>
<term>Stress oxydatif (MeSH)</term>
<term>Superoxide dismutase (métabolisme)</term>
<term>Sécheresses (MeSH)</term>
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<term>Plant Stomata</term>
<term>Populus</term>
<term>Reactive Oxygen Species</term>
<term>Superoxide Dismutase</term>
<term>Water</term>
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<term>Espèces réactives de l'oxygène</term>
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<term>Pousses de plante</term>
<term>Racines de plante</term>
<term>Stomates de plante</term>
<term>Superoxide dismutase</term>
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<term>Droughts</term>
<term>Gene Expression Regulation, Plant</term>
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<term>Phenotype</term>
<term>Photosynthesis</term>
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<term>Métabolisme glucidique</term>
<term>Photosynthèse</term>
<term>Phénotype</term>
<term>Régulation de l'expression des gènes végétaux</term>
<term>Stress oxydatif</term>
<term>Sécheresses</term>
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<front><div type="abstract" xml:lang="en">Drought is expected to become an increasingly important factor limiting tree growth caused by climate change. Two divergent clones of Populus nigra (58-861 and Poli) originating from contrasting environments were subjected to water limitation (WL) to elucidate whether they differ in tolerance to drought, which mechanisms to avoid stress they exhibit and whether drought has an impact on the interactions between roots and shoots. Limiting water availability caused photosynthetic rate and total non-structural carbohydrate (TNC) levels to decrease in 58-861. However, starch-degrading enzyme activity and gene expression were induced in roots, and soluble sugar levels were higher than in well-watered (WW) plants. These data suggest that assimilation and partitioning of carbon to the roots are decreased, resulting in mobilization of stored starch. In contrast, the photosynthetic rate of Poli was reduced only late in the treatment, and carbohydrate levels in WL plants were higher than in WW plants. Superoxide dismutase (SOD) activity and gene expression were higher in Poli than in 58-861, even in WW plants, leading to a higher capacity to defend against oxidative stress.</div>
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<Abstract><AbstractText>Drought is expected to become an increasingly important factor limiting tree growth caused by climate change. Two divergent clones of Populus nigra (58-861 and Poli) originating from contrasting environments were subjected to water limitation (WL) to elucidate whether they differ in tolerance to drought, which mechanisms to avoid stress they exhibit and whether drought has an impact on the interactions between roots and shoots. Limiting water availability caused photosynthetic rate and total non-structural carbohydrate (TNC) levels to decrease in 58-861. However, starch-degrading enzyme activity and gene expression were induced in roots, and soluble sugar levels were higher than in well-watered (WW) plants. These data suggest that assimilation and partitioning of carbon to the roots are decreased, resulting in mobilization of stored starch. In contrast, the photosynthetic rate of Poli was reduced only late in the treatment, and carbohydrate levels in WL plants were higher than in WW plants. Superoxide dismutase (SOD) activity and gene expression were higher in Poli than in 58-861, even in WW plants, leading to a higher capacity to defend against oxidative stress.</AbstractText>
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<name sortKey="Zeeman, Samuel C" sort="Zeeman, Samuel C" uniqKey="Zeeman S" first="Samuel C" last="Zeeman">Samuel C. Zeeman</name>
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<country name="Suisse"><noRegion><name sortKey="Regier, Nicole" sort="Regier, Nicole" uniqKey="Regier N" first="Nicole" last="Regier">Nicole Regier</name>
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