Does ozone exposure protect from photoinhibition?
Identifieur interne : 004893 ( Main/Exploration ); précédent : 004892; suivant : 004894Does ozone exposure protect from photoinhibition?
Auteurs : T G Reichenauer [Autriche] ; H R Bolhàr-NordenkampfSource :
- Free radical research [ 1071-5762 ] ; 1999.
Descripteurs français
- KwdFr :
- Chlorophylle (métabolisme), Complexe protéique du centre réactionnel de la photosynthèse (effets des médicaments et des substances chimiques), Complexe protéique du centre réactionnel de la photosynthèse (effets des radiations), Complexe protéique du centre réactionnel de la photosynthèse (métabolisme), Complexes collecteurs de lumière (MeSH), Espèces réactives de l'oxygène (métabolisme), Feuilles de plante (effets des médicaments et des substances chimiques), Feuilles de plante (effets des radiations), Feuilles de plante (métabolisme), Lumière (MeSH), Lutéine (métabolisme), Ozone (pharmacologie), Photosynthèse (effets des médicaments et des substances chimiques), Photosynthèse (effets des radiations), Pigments biologiques (métabolisme), Rosales (effets des médicaments et des substances chimiques), Rosales (effets des radiations), Rosales (métabolisme).
- MESH :
- effets des médicaments et des substances chimiques : Complexe protéique du centre réactionnel de la photosynthèse, Feuilles de plante, Photosynthèse, Rosales.
- effets des radiations : Complexe protéique du centre réactionnel de la photosynthèse, Feuilles de plante, Photosynthèse, Rosales.
- métabolisme : Chlorophylle, Complexe protéique du centre réactionnel de la photosynthèse, Espèces réactives de l'oxygène, Feuilles de plante, Lutéine, Pigments biologiques, Rosales.
- pharmacologie : Ozone.
- Complexes collecteurs de lumière, Lumière.
English descriptors
- KwdEn :
- Chlorophyll (metabolism), Light (MeSH), Light-Harvesting Protein Complexes (MeSH), Lutein (metabolism), Ozone (pharmacology), Photosynthesis (drug effects), Photosynthesis (radiation effects), Photosynthetic Reaction Center Complex Proteins (drug effects), Photosynthetic Reaction Center Complex Proteins (metabolism), Photosynthetic Reaction Center Complex Proteins (radiation effects), Pigments, Biological (metabolism), Plant Leaves (drug effects), Plant Leaves (metabolism), Plant Leaves (radiation effects), Reactive Oxygen Species (metabolism), Rosales (drug effects), Rosales (metabolism), Rosales (radiation effects).
- MESH :
- chemical , drug effects : Photosynthetic Reaction Center Complex Proteins.
- chemical , metabolism : Chlorophyll, Lutein, Photosynthetic Reaction Center Complex Proteins, Pigments, Biological, Reactive Oxygen Species.
- chemical , pharmacology : Ozone.
- drug effects : Photosynthesis, Plant Leaves, Rosales.
- metabolism : Plant Leaves, Rosales.
- radiation effects : Photosynthesis, Photosynthetic Reaction Center Complex Proteins, Plant Leaves, Rosales.
- Light, Light-Harvesting Protein Complexes.
Abstract
Tropospheric ozone and high light intensities are two stress factors that often occur simultaneously under natural conditions. Ozone is well known to form oxygen radicals in the apoplastic water and long lasting photoinhibition can cause photooxidative damage also by formation of several species of oxygen radicals. We were interested whether moderate levels of ozone would be able to modulate the response of leaves to photoinhibitory conditions naturally occurring around noon on a bright day. Cuttings of Populus sp. were cultivated in two separate greenhouse-compartments adapted as fumigation chambers. In the two compartments plants were grown in ambient air containing about 20 nmol mol(-1) ozone and in elevated ozone concentrations supplied for 8 h per day. During the midday of bright days Fv/Fm decreased by the same amount in all leaves, indicating photoinhibition. At the same time Fo increased in control leaves more than in ozone-exposed leaves indicating a higher amount of heat-deactivating PSII centres in the latter. This was confirmed by a higher epoxidation state in ozone-exposed leaves during midday of a bright day. The contents of chlorophyll a and chlorophyll b were significantly decreased in ozone-exposed leaves. In older leaves the ratios chlorophyll a : b, and xanthophylls: chlorophyll b were increased indicating an adaptation to higher light stress. From this we conclude that by increasing the amount of heat-deactivating centres ozone seems to protect PSII from photoinhibition.
DOI: 10.1080/10715769900301501
PubMed: 10694059
Affiliations:
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Research</wicri:regionArea><wicri:noRegion>Department of Environmental Research</wicri:noRegion></affiliation></author><author><name sortKey="Bolhar Nordenkampf, H R" sort="Bolhar Nordenkampf, H R" uniqKey="Bolhar Nordenkampf H" first="H R" last="Bolhàr-Nordenkampf">H R Bolhàr-Nordenkampf</name></author></analytic><series><title level="j">Free radical research</title><idno type="ISSN">1071-5762</idno><imprint><date when="1999" type="published">1999</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Chlorophyll (metabolism)</term><term>Light (MeSH)</term><term>Light-Harvesting Protein Complexes (MeSH)</term><term>Lutein (metabolism)</term><term>Ozone (pharmacology)</term><term>Photosynthesis (drug effects)</term><term>Photosynthesis (radiation effects)</term><term>Photosynthetic Reaction Center Complex Proteins (drug effects)</term><term>Photosynthetic Reaction Center Complex Proteins (metabolism)</term><term>Photosynthetic Reaction Center Complex Proteins (radiation effects)</term><term>Pigments, Biological (metabolism)</term><term>Plant Leaves (drug effects)</term><term>Plant Leaves (metabolism)</term><term>Plant Leaves (radiation effects)</term><term>Reactive Oxygen Species (metabolism)</term><term>Rosales (drug effects)</term><term>Rosales (metabolism)</term><term>Rosales (radiation effects)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Chlorophylle (métabolisme)</term><term>Complexe protéique du centre réactionnel de la photosynthèse (effets des médicaments et des substances chimiques)</term><term>Complexe protéique du centre réactionnel de la photosynthèse (effets des radiations)</term><term>Complexe protéique du centre réactionnel de la photosynthèse (métabolisme)</term><term>Complexes collecteurs de lumière (MeSH)</term><term>Espèces réactives de l'oxygène (métabolisme)</term><term>Feuilles de plante (effets des médicaments et des substances chimiques)</term><term>Feuilles de plante (effets des radiations)</term><term>Feuilles de plante (métabolisme)</term><term>Lumière (MeSH)</term><term>Lutéine (métabolisme)</term><term>Ozone (pharmacologie)</term><term>Photosynthèse (effets des médicaments et des substances chimiques)</term><term>Photosynthèse (effets des radiations)</term><term>Pigments biologiques (métabolisme)</term><term>Rosales (effets des médicaments et des substances chimiques)</term><term>Rosales (effets des radiations)</term><term>Rosales (métabolisme)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="drug effects" xml:lang="en"><term>Photosynthetic Reaction Center Complex Proteins</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Chlorophyll</term><term>Lutein</term><term>Photosynthetic Reaction Center Complex Proteins</term><term>Pigments, Biological</term><term>Reactive Oxygen Species</term></keywords><keywords scheme="MESH" type="chemical" qualifier="pharmacology" xml:lang="en"><term>Ozone</term></keywords><keywords scheme="MESH" qualifier="drug effects" xml:lang="en"><term>Photosynthesis</term><term>Plant Leaves</term><term>Rosales</term></keywords><keywords scheme="MESH" qualifier="effets des médicaments et des substances chimiques" xml:lang="fr"><term>Complexe protéique du centre réactionnel de la photosynthèse</term><term>Feuilles de plante</term><term>Photosynthèse</term><term>Rosales</term></keywords><keywords scheme="MESH" qualifier="effets des radiations" xml:lang="fr"><term>Complexe protéique du centre réactionnel de la photosynthèse</term><term>Feuilles de plante</term><term>Photosynthèse</term><term>Rosales</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Plant Leaves</term><term>Rosales</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Chlorophylle</term><term>Complexe protéique du centre réactionnel de la photosynthèse</term><term>Espèces réactives de l'oxygène</term><term>Feuilles de plante</term><term>Lutéine</term><term>Pigments biologiques</term><term>Rosales</term></keywords><keywords scheme="MESH" qualifier="pharmacologie" xml:lang="fr"><term>Ozone</term></keywords><keywords scheme="MESH" qualifier="radiation effects" xml:lang="en"><term>Photosynthesis</term><term>Photosynthetic Reaction Center Complex Proteins</term><term>Plant Leaves</term><term>Rosales</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Light</term><term>Light-Harvesting Protein Complexes</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Complexes collecteurs de lumière</term><term>Lumière</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Tropospheric ozone and high light intensities are two stress factors that often occur simultaneously under natural conditions. Ozone is well known to form oxygen radicals in the apoplastic water and long lasting photoinhibition can cause photooxidative damage also by formation of several species of oxygen radicals. We were interested whether moderate levels of ozone would be able to modulate the response of leaves to photoinhibitory conditions naturally occurring around noon on a bright day. Cuttings of Populus sp. were cultivated in two separate greenhouse-compartments adapted as fumigation chambers. In the two compartments plants were grown in ambient air containing about 20 nmol mol(-1) ozone and in elevated ozone concentrations supplied for 8 h per day. During the midday of bright days Fv/Fm decreased by the same amount in all leaves, indicating photoinhibition. At the same time Fo increased in control leaves more than in ozone-exposed leaves indicating a higher amount of heat-deactivating PSII centres in the latter. This was confirmed by a higher epoxidation state in ozone-exposed leaves during midday of a bright day. The contents of chlorophyll a and chlorophyll b were significantly decreased in ozone-exposed leaves. In older leaves the ratios chlorophyll a : b, and xanthophylls: chlorophyll b were increased indicating an adaptation to higher light stress. From this we conclude that by increasing the amount of heat-deactivating centres ozone seems to protect PSII from photoinhibition.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">10694059</PMID><DateCompleted><Year>2000</Year><Month>03</Month><Day>30</Day></DateCompleted><DateRevised><Year>2019</Year><Month>09</Month><Day>21</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">1071-5762</ISSN><JournalIssue CitedMedium="Print"><Volume>31 Suppl</Volume><PubDate><Year>1999</Year><Month>Dec</Month></PubDate></JournalIssue><Title>Free radical research</Title><ISOAbbreviation>Free Radic Res</ISOAbbreviation></Journal><ArticleTitle>Does ozone exposure protect from photoinhibition?</ArticleTitle><Pagination><MedlinePgn>S193-8</MedlinePgn></Pagination><Abstract><AbstractText>Tropospheric ozone and high light intensities are two stress factors that often occur simultaneously under natural conditions. Ozone is well known to form oxygen radicals in the apoplastic water and long lasting photoinhibition can cause photooxidative damage also by formation of several species of oxygen radicals. We were interested whether moderate levels of ozone would be able to modulate the response of leaves to photoinhibitory conditions naturally occurring around noon on a bright day. Cuttings of Populus sp. were cultivated in two separate greenhouse-compartments adapted as fumigation chambers. In the two compartments plants were grown in ambient air containing about 20 nmol mol(-1) ozone and in elevated ozone concentrations supplied for 8 h per day. During the midday of bright days Fv/Fm decreased by the same amount in all leaves, indicating photoinhibition. At the same time Fo increased in control leaves more than in ozone-exposed leaves indicating a higher amount of heat-deactivating PSII centres in the latter. This was confirmed by a higher epoxidation state in ozone-exposed leaves during midday of a bright day. The contents of chlorophyll a and chlorophyll b were significantly decreased in ozone-exposed leaves. In older leaves the ratios chlorophyll a : b, and xanthophylls: chlorophyll b were increased indicating an adaptation to higher light stress. From this we conclude that by increasing the amount of heat-deactivating centres ozone seems to protect PSII from photoinhibition.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Reichenauer</LastName><ForeName>T G</ForeName><Initials>TG</Initials><AffiliationInfo><Affiliation>Austrian Research Centre Seibersdorf, Department of Environmental Research, Austria.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Bolhàr-Nordenkampf</LastName><ForeName>H R</ForeName><Initials>HR</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Free Radic Res</MedlineTA><NlmUniqueID>9423872</NlmUniqueID><ISSNLinking>1029-2470</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D045342">Light-Harvesting Protein 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Proteins</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="Y">drug effects</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName><QualifierName UI="Q000528" MajorTopicYN="Y">radiation effects</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D010860" MajorTopicYN="N">Pigments, Biological</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="N">drug effects</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName><QualifierName UI="Q000528" MajorTopicYN="N">radiation effects</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D017382" MajorTopicYN="N">Reactive Oxygen Species</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D019685" MajorTopicYN="N">Rosales</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="Y">drug effects</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName><QualifierName UI="Q000528" MajorTopicYN="Y">radiation effects</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>2000</Year><Month>2</Month><Day>29</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2000</Year><Month>4</Month><Day>1</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2000</Year><Month>2</Month><Day>29</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">10694059</ArticleId><ArticleId IdType="doi">10.1080/10715769900301501</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Autriche</li></country></list><tree><noCountry><name sortKey="Bolhar Nordenkampf, H R" sort="Bolhar Nordenkampf, H R" uniqKey="Bolhar Nordenkampf H" first="H R" last="Bolhàr-Nordenkampf">H R Bolhàr-Nordenkampf</name></noCountry><country name="Autriche"><noRegion><name sortKey="Reichenauer, T G" sort="Reichenauer, T G" uniqKey="Reichenauer T" first="T G" last="Reichenauer">T G Reichenauer</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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