Deciphering the main determinants of O3 tolerance in Euramerican poplar genotypes.
Identifieur interne : 000A42 ( Main/Exploration ); précédent : 000A41; suivant : 000A43Deciphering the main determinants of O3 tolerance in Euramerican poplar genotypes.
Auteurs : Anthony Gandin [France] ; Andrea Davrinche [France] ; Yves Jolivet [France]Source :
- The Science of the total environment [ 1879-1026 ] ; 2019.
Descripteurs français
- KwdFr :
- MESH :
- génétique : Populus.
- métabolisme : Ozone, Polluants atmosphériques.
- physiologie : Feuilles de plante, Populus.
- Génotype, Photosynthèse, Stress oxydatif.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Air Pollutants, Ozone.
- genetics : Populus.
- physiology : Plant Leaves, Populus.
- Genotype, Oxidative Stress, Photosynthesis.
Abstract
Tropospheric ozone (O3) is the main secondary pollutant and considered to be the most damaging for growth and productivity. O3 is well known to induce oxidative stress and Reactive Oxygen Species accumulation in leaf tissues. Several mechanisms have been suggested to enable trees to cope with such stress; however, their relative contribution to O3 tolerance is still unclear. Here, ten Euramerican poplar genotypes (Populus deltoides × nigra) were investigated regarding their response to 120 ppb of O3 for 3 weeks in order to determine main mechanisms and identify the key traits and strategies linked to a better tolerance to O3-induced oxidative stress. Results showed that ascorbate peroxidase and ascorbate regeneration through monodehydroascorbate reductase are the main determinants of O3 tolerance in Euramerican poplar, in protecting photosynthesis capacity from oxidative stress and therefore, maintaining growth and productivity. Besides, stomatal closure was harmful in sensitive genotypes, suggesting that avoiding strategy can be further deleterious under chronic ozone. Finally, O3-induced early senescence appeared essential when up scaling leaf-level mechanistic response to whole-plant productivity, in fine-tuning resource reallocation and photosynthesis area.
DOI: 10.1016/j.scitotenv.2018.11.307
PubMed: 30529971
Affiliations:
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O<sub>3</sub> is well known to induce oxidative stress and Reactive Oxygen Species accumulation in leaf tissues. Several mechanisms have been suggested to enable trees to cope with such stress; however, their relative contribution to O<sub>3</sub> tolerance is still unclear. Here, ten Euramerican poplar genotypes (Populus deltoides × nigra) were investigated regarding their response to 120 ppb of O<sub>3</sub> for 3 weeks in order to determine main mechanisms and identify the key traits and strategies linked to a better tolerance to O<sub>3</sub>-induced oxidative stress. Results showed that ascorbate peroxidase and ascorbate regeneration through monodehydroascorbate reductase are the main determinants of O<sub>3</sub> tolerance in Euramerican poplar, in protecting photosynthesis capacity from oxidative stress and therefore, maintaining growth and productivity. Besides, stomatal closure was harmful in sensitive genotypes, suggesting that avoiding strategy can be further deleterious under chronic ozone. Finally, O<sub>3</sub>-induced early senescence appeared essential when up scaling leaf-level mechanistic response to whole-plant productivity, in fine-tuning resource reallocation and photosynthesis area.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">30529971</PMID><DateCompleted><Year>2019</Year><Month>02</Month><Day>21</Day></DateCompleted><DateRevised><Year>2019</Year><Month>02</Month><Day>21</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1879-1026</ISSN><JournalIssue CitedMedium="Internet"><Volume>656</Volume><PubDate><Year>2019</Year><Month>Mar</Month><Day>15</Day></PubDate></JournalIssue><Title>The Science of the total environment</Title><ISOAbbreviation>Sci Total Environ</ISOAbbreviation></Journal><ArticleTitle>Deciphering the main determinants of O<sub>3</sub> tolerance in Euramerican poplar genotypes.</ArticleTitle><Pagination><MedlinePgn>681-690</MedlinePgn></Pagination><ELocationID EIdType="pii" ValidYN="Y">S0048-9697(18)34663-1</ELocationID><ELocationID EIdType="doi" ValidYN="Y">10.1016/j.scitotenv.2018.11.307</ELocationID><Abstract><AbstractText>Tropospheric ozone (O<sub>3</sub>) is the main secondary pollutant and considered to be the most damaging for growth and productivity. O<sub>3</sub> is well known to induce oxidative stress and Reactive Oxygen Species accumulation in leaf tissues. Several mechanisms have been suggested to enable trees to cope with such stress; however, their relative contribution to O<sub>3</sub> tolerance is still unclear. Here, ten Euramerican poplar genotypes (Populus deltoides × nigra) were investigated regarding their response to 120 ppb of O<sub>3</sub> for 3 weeks in order to determine main mechanisms and identify the key traits and strategies linked to a better tolerance to O<sub>3</sub>-induced oxidative stress. Results showed that ascorbate peroxidase and ascorbate regeneration through monodehydroascorbate reductase are the main determinants of O<sub>3</sub> tolerance in Euramerican poplar, in protecting photosynthesis capacity from oxidative stress and therefore, maintaining growth and productivity. Besides, stomatal closure was harmful in sensitive genotypes, suggesting that avoiding strategy can be further deleterious under chronic ozone. Finally, O<sub>3</sub>-induced early senescence appeared essential when up scaling leaf-level mechanistic response to whole-plant productivity, in fine-tuning resource reallocation and photosynthesis area.</AbstractText><CopyrightInformation>Copyright © 2018 Elsevier B.V. All rights reserved.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Gandin</LastName><ForeName>Anthony</ForeName><Initials>A</Initials><AffiliationInfo><Affiliation>Université de Lorraine, AgroParisTech, INRA, UMR Silva, 54000 Nancy, France. 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