Genotypic variation in growth and physiological responses of Finnish hybrid aspen (Populus tremuloides x P. tremula) to elevated tropospheric ozone concentration.
Identifieur interne : 004697 ( Main/Exploration ); précédent : 004696; suivant : 004698Genotypic variation in growth and physiological responses of Finnish hybrid aspen (Populus tremuloides x P. tremula) to elevated tropospheric ozone concentration.
Auteurs : E. Oksanen [Finlande] ; G. Amores ; H. Kokko ; J M Amores ; L. K RenlampiSource :
- Tree physiology [ 0829-318X ] ; 2001.
Descripteurs français
- KwdFr :
- Arbres (croissance et développement), Arbres (génétique), Arbres (physiologie), Dioxyde de carbone (MeSH), Feuilles de plante (physiologie), Génotype (MeSH), Ozone (MeSH), Photosynthèse (physiologie), Racines de plante (physiologie), Salicaceae (croissance et développement), Salicaceae (génétique), Salicaceae (physiologie), Tiges de plante (physiologie), Transpiration des plantes (physiologie), Variation génétique (physiologie).
- MESH :
- croissance et développement : Arbres, Salicaceae.
- génétique : Arbres, Salicaceae.
- physiologie : Arbres, Feuilles de plante, Photosynthèse, Racines de plante, Salicaceae, Tiges de plante, Transpiration des plantes, Variation génétique.
- Dioxyde de carbone, Génotype, Ozone.
English descriptors
- KwdEn :
- Carbon Dioxide (MeSH), Genetic Variation (physiology), Genotype (MeSH), Ozone (MeSH), Photosynthesis (physiology), Plant Leaves (physiology), Plant Roots (physiology), Plant Stems (physiology), Plant Transpiration (physiology), Salicaceae (genetics), Salicaceae (growth & development), Salicaceae (physiology), Trees (genetics), Trees (growth & development), Trees (physiology).
- MESH :
- chemical : Carbon Dioxide, Ozone.
- genetics : Salicaceae, Trees.
- growth & development : Salicaceae, Trees.
- physiology : Genetic Variation, Photosynthesis, Plant Leaves, Plant Roots, Plant Stems, Plant Transpiration, Salicaceae, Trees.
- Genotype.
Abstract
Saplings of six Finnish hybrid aspen (Populus tremuloides Michx. x P. tremula L.) clones were exposed to 0, 50, 100 and 150 ppb ozone (O3) for 32 days in a chamber experiment to determine differences in O3 sensitivity among genotypes. Based on the chamber experiment, three clones with intermediate sensitivity to O3 were selected for a free-air O3 enrichment experiment in which plants were exposed for 2 months to either ambient air (control) or air containing 1.3 x the ambient O3 concentration. We measured stem height and radial growth, number of leaves, dry mass and relative growth rate of leaves, stem and roots, visible leaf injuries, net photosynthesis and stomatal conductance of the clones. There was high clonal variation in susceptibility to O3 in the chamber experiment, indicated by foliar injuries and differential reductions in growth and net photosynthesis. In the free-air O3 enrichment experiment, ozone caused a shift in resource allocation toward stem height growth, thereby altering the shoot to root balance. In both experiments, low O3 concentrations tended to stimulate growth of most clones, whereas 100 and 150 ppb O3 in the chamber experiment impaired growth of most clones. However, growth of the most O3-tolerant clone was not significantly affected by any O3 treatment.
DOI: 10.1093/treephys/21.16.1171
PubMed: 11600339
Affiliations:
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Kokko</name></author><author><name sortKey="Amores, J M" sort="Amores, J M" uniqKey="Amores J" first="J M" last="Amores">J M Amores</name></author><author><name sortKey="K Renlampi, L" sort="K Renlampi, L" uniqKey="K Renlampi L" first="L" last="K Renlampi">L. 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Oksanen</name><affiliation wicri:level="1"><nlm:affiliation>Department of Ecology and Environmental Science, University of Kuopio, POB 1627, 70211 Kuopio, Finland.</nlm:affiliation><country xml:lang="fr">Finlande</country><wicri:regionArea>Department of Ecology and Environmental Science, University of Kuopio, POB 1627, 70211 Kuopio</wicri:regionArea><wicri:noRegion>70211 Kuopio</wicri:noRegion></affiliation></author><author><name sortKey="Amores, G" sort="Amores, G" uniqKey="Amores G" first="G" last="Amores">G. Amores</name></author><author><name sortKey="Kokko, H" sort="Kokko, H" uniqKey="Kokko H" first="H" last="Kokko">H. Kokko</name></author><author><name sortKey="Amores, J M" sort="Amores, J M" uniqKey="Amores J" first="J M" last="Amores">J M Amores</name></author><author><name sortKey="K Renlampi, L" sort="K Renlampi, L" uniqKey="K Renlampi L" first="L" last="K Renlampi">L. 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Based on the chamber experiment, three clones with intermediate sensitivity to O3 were selected for a free-air O3 enrichment experiment in which plants were exposed for 2 months to either ambient air (control) or air containing 1.3 x the ambient O3 concentration. We measured stem height and radial growth, number of leaves, dry mass and relative growth rate of leaves, stem and roots, visible leaf injuries, net photosynthesis and stomatal conductance of the clones. There was high clonal variation in susceptibility to O3 in the chamber experiment, indicated by foliar injuries and differential reductions in growth and net photosynthesis. In the free-air O3 enrichment experiment, ozone caused a shift in resource allocation toward stem height growth, thereby altering the shoot to root balance. In both experiments, low O3 concentrations tended to stimulate growth of most clones, whereas 100 and 150 ppb O3 in the chamber experiment impaired growth of most clones. However, growth of the most O3-tolerant clone was not significantly affected by any O3 treatment.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">11600339</PMID><DateCompleted><Year>2002</Year><Month>09</Month><Day>20</Day></DateCompleted><DateRevised><Year>2019</Year><Month>05</Month><Day>13</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0829-318X</ISSN><JournalIssue CitedMedium="Print"><Volume>21</Volume><Issue>16</Issue><PubDate><Year>2001</Year><Month>Oct</Month></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Genotypic variation in growth and physiological responses of Finnish hybrid aspen (Populus tremuloides x P. tremula) to elevated tropospheric ozone concentration.</ArticleTitle><Pagination><MedlinePgn>1171-81</MedlinePgn></Pagination><Abstract><AbstractText>Saplings of six Finnish hybrid aspen (Populus tremuloides Michx. x P. tremula L.) clones were exposed to 0, 50, 100 and 150 ppb ozone (O3) for 32 days in a chamber experiment to determine differences in O3 sensitivity among genotypes. Based on the chamber experiment, three clones with intermediate sensitivity to O3 were selected for a free-air O3 enrichment experiment in which plants were exposed for 2 months to either ambient air (control) or air containing 1.3 x the ambient O3 concentration. We measured stem height and radial growth, number of leaves, dry mass and relative growth rate of leaves, stem and roots, visible leaf injuries, net photosynthesis and stomatal conductance of the clones. There was high clonal variation in susceptibility to O3 in the chamber experiment, indicated by foliar injuries and differential reductions in growth and net photosynthesis. In the free-air O3 enrichment experiment, ozone caused a shift in resource allocation toward stem height growth, thereby altering the shoot to root balance. In both experiments, low O3 concentrations tended to stimulate growth of most clones, whereas 100 and 150 ppb O3 in the chamber experiment impaired growth of most clones. 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Amores</name><name sortKey="Amores, J M" sort="Amores, J M" uniqKey="Amores J" first="J M" last="Amores">J M Amores</name><name sortKey="K Renlampi, L" sort="K Renlampi, L" uniqKey="K Renlampi L" first="L" last="K Renlampi">L. K Renlampi</name><name sortKey="Kokko, H" sort="Kokko, H" uniqKey="Kokko H" first="H" last="Kokko">H. Kokko</name></noCountry><country name="Finlande"><noRegion><name sortKey="Oksanen, E" sort="Oksanen, E" uniqKey="Oksanen E" first="E" last="Oksanen">E. Oksanen</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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