Elevated CO2 protects poplar (Populus trichocarpa × P. deltoides) from damage induced by O3: identification of mechanisms.
Identifieur interne : 004048 ( Main/Exploration ); précédent : 004047; suivant : 004049Elevated CO2 protects poplar (Populus trichocarpa × P. deltoides) from damage induced by O3: identification of mechanisms.
Auteurs : Simon D L. Gardner [Royaume-Uni] ; Peter H. Freer-Smith [Royaume-Uni] ; J. Tucker [Royaume-Uni] ; Gail Taylor [Royaume-Uni]Source :
- Functional plant biology : FPB [ 1445-4416 ] ; 2005.
Abstract
CO2 concentrations in the Earth's atmosphere will rise to between 550 and 700 μL L-1 by 2100 (IPCC 2001). In much of the world, ozone (O3) is the air pollutant most likely to be having adverse effects on the growth of plants. Here we describe the impacts of CO2 and O3 episodes (rising to 100 nL L-1), singly and in mixtures on the growth and physiology of an interamerican hybrid poplar (Populus trichocarpa L. (Torr. & Gray ex Hook.) × P. deltoids Bartr. ex Marsh). 700 μL L-1 CO2 increased all growth variables relative to values in 350 μL L-1. Mainstem dry weight showed a 38% increase in year 1 and a 32% increase in year 2. Ozone episodes reduced mainstem dry mass by 45% in 350 μL L-1 CO2 and by 34% in 700 μL L-1 CO2. A / Ci analysis showed limited effects on photosynthetic efficiency of 700 μL L-1 CO2 but in contrast, Vcmax was reduced by O3 episodes. CO2 tended to increase leaf expansion but O3 episodes reduced expansion rates generally although a short period of increased leaf expansion in response to O3 was also observed. O3 reduced leaf solute potentials (Ψs) and increased turgor (P) in young leaves. Cell wall properties (elasticity and plasticity) were both stimulated by ozone and this was associated with increased leaf expansion. A new mechanism is proposed which suggests that O3 may act directly on the cell wall, attacking polysaccharides in the wall that result in altered cell wall properties and leaf growth. O3 episodes increased leaf loss, elevated CO2 delayed abscission and O3 was less effective at accelerating leaf loss in elevated CO2. Overall CO2 increased growth, O3 caused decreases and the treatment combination gave intermediate effects. Thus O3 episodes are less likely to be detrimental to P. trichocarpa × P. deltoides in the CO2 concentrations of the future.
DOI: 10.1071/FP04131
PubMed: 32689126
Affiliations:
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Gardner</name><affiliation wicri:level="4"><nlm:affiliation>School of Biological Sciences, University of Sussex, Falmer, East Sussex, BN1 9QG, UK.</nlm:affiliation><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>School of Biological Sciences, University of Sussex, Falmer, East Sussex, BN1 9QG</wicri:regionArea><orgName type="university">Université du Sussex</orgName><placeName><settlement type="city">Brighton</settlement><settlement type="town">Falmer</settlement><region type="nation">Angleterre</region><region nuts="2" type="region">Sussex de l'Est</region></placeName></affiliation></author><author><name sortKey="Freer Smith, Peter H" sort="Freer Smith, Peter H" uniqKey="Freer Smith P" first="Peter H" last="Freer-Smith">Peter H. Freer-Smith</name><affiliation wicri:level="1"><nlm:affiliation>Forest Research, Alice Holt Lodge, Wrecclesham, FARNHAM, Surrey, GU10 4LH, UK.</nlm:affiliation><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Forest Research, Alice Holt Lodge, Wrecclesham, FARNHAM, Surrey, GU10 4LH</wicri:regionArea><wicri:noRegion>GU10 4LH</wicri:noRegion></affiliation></author><author><name sortKey="Tucker, J" sort="Tucker, J" uniqKey="Tucker J" first="J" last="Tucker">J. Tucker</name><affiliation wicri:level="1"><nlm:affiliation>School of Biological Sciences, Bassett Crescent East, University of Southampton, SO16 7PX, UK.Corresponding author. Email.</nlm:affiliation><country xml:lang="fr" wicri:curation="lc">Royaume-Uni</country><wicri:regionArea>School of Biological Sciences, Bassett Crescent East, University of Southampton, SO16 7PX</wicri:regionArea><wicri:noRegion>SO16 7PX</wicri:noRegion></affiliation></author><author><name sortKey="Taylor, Gail" sort="Taylor, Gail" uniqKey="Taylor G" first="Gail" last="Taylor">Gail Taylor</name><affiliation wicri:level="1"><nlm:affiliation>School of Biological Sciences, Bassett Crescent East, University of Southampton, SO16 7PX, UK.Corresponding author. Email.</nlm:affiliation><country xml:lang="fr" wicri:curation="lc">Royaume-Uni</country><wicri:regionArea>School of Biological Sciences, Bassett Crescent East, University of Southampton, SO16 7PX</wicri:regionArea><wicri:noRegion>SO16 7PX</wicri:noRegion></affiliation></author></analytic><series><title level="j">Functional plant biology : FPB</title><idno type="eISSN">1445-4416</idno><imprint><date when="2005" type="published">2005</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">CO<sub>2</sub> concentrations in the Earth's atmosphere will rise to between 550 and 700 μL L<sup>-1</sup> by 2100 (IPCC 2001). In much of the world, ozone (O<sub>3</sub>) is the air pollutant most likely to be having adverse effects on the growth of plants. Here we describe the impacts of CO<sub>2</sub> and O<sub>3</sub> episodes (rising to 100 nL L<sup>-1</sup>), singly and in mixtures on the growth and physiology of an interamerican hybrid poplar (Populus trichocarpa L. (Torr. & Gray ex Hook.) × P. deltoids Bartr. ex Marsh). 700 μL L<sup>-1</sup> CO<sub>2</sub> increased all growth variables relative to values in 350 μL L<sup>-1</sup>. Mainstem dry weight showed a 38% increase in year 1 and a 32% increase in year 2. Ozone episodes reduced mainstem dry mass by 45% in 350 μL L<sup>-1</sup> CO<sub>2</sub> and by 34% in 700 μL L<sup>-1</sup> CO<sub>2</sub>. A / C<sub>i</sub> analysis showed limited effects on photosynthetic efficiency of 700 μL L<sup>-1</sup> CO<sub>2</sub> but in contrast, V<sub>cmax</sub> was reduced by O<sub>3</sub> episodes. CO<sub>2</sub> tended to increase leaf expansion but O<sub>3</sub> episodes reduced expansion rates generally although a short period of increased leaf expansion in response to O<sub>3</sub> was also observed. O<sub>3</sub> reduced leaf solute potentials (Ψs) and increased turgor (P) in young leaves. Cell wall properties (elasticity and plasticity) were both stimulated by ozone and this was associated with increased leaf expansion. A new mechanism is proposed which suggests that O<sub>3</sub> may act directly on the cell wall, attacking polysaccharides in the wall that result in altered cell wall properties and leaf growth. O<sub>3</sub> episodes increased leaf loss, elevated CO<sub>2</sub> delayed abscission and O<sub>3</sub> was less effective at accelerating leaf loss in elevated CO<sub>2</sub>. Overall CO<sub>2</sub> increased growth, O<sub>3</sub> caused decreases and the treatment combination gave intermediate effects. Thus O<sub>3</sub> episodes are less likely to be detrimental to P. trichocarpa × P. deltoides in the CO<sub>2</sub> concentrations of the future.</div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">32689126</PMID><DateRevised><Year>2020</Year><Month>07</Month><Day>21</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">1445-4416</ISSN><JournalIssue CitedMedium="Internet"><Volume>32</Volume><Issue>3</Issue><PubDate><Year>2005</Year><Month>May</Month></PubDate></JournalIssue><Title>Functional plant biology : FPB</Title><ISOAbbreviation>Funct Plant Biol</ISOAbbreviation></Journal><ArticleTitle>Elevated CO<sub>2</sub> protects poplar (Populus trichocarpa × P. deltoides) from damage induced by O<sub>3</sub>: identification of mechanisms.</ArticleTitle><Pagination><MedlinePgn>221-235</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1071/FP04131</ELocationID><Abstract><AbstractText>CO<sub>2</sub> concentrations in the Earth's atmosphere will rise to between 550 and 700 μL L<sup>-1</sup> by 2100 (IPCC 2001). In much of the world, ozone (O<sub>3</sub>) is the air pollutant most likely to be having adverse effects on the growth of plants. Here we describe the impacts of CO<sub>2</sub> and O<sub>3</sub> episodes (rising to 100 nL L<sup>-1</sup>), singly and in mixtures on the growth and physiology of an interamerican hybrid poplar (Populus trichocarpa L. (Torr. & Gray ex Hook.) × P. deltoids Bartr. ex Marsh). 700 μL L<sup>-1</sup> CO<sub>2</sub> increased all growth variables relative to values in 350 μL L<sup>-1</sup>. Mainstem dry weight showed a 38% increase in year 1 and a 32% increase in year 2. Ozone episodes reduced mainstem dry mass by 45% in 350 μL L<sup>-1</sup> CO<sub>2</sub> and by 34% in 700 μL L<sup>-1</sup> CO<sub>2</sub>. A / C<sub>i</sub> analysis showed limited effects on photosynthetic efficiency of 700 μL L<sup>-1</sup> CO<sub>2</sub> but in contrast, V<sub>cmax</sub> was reduced by O<sub>3</sub> episodes. CO<sub>2</sub> tended to increase leaf expansion but O<sub>3</sub> episodes reduced expansion rates generally although a short period of increased leaf expansion in response to O<sub>3</sub> was also observed. O<sub>3</sub> reduced leaf solute potentials (Ψs) and increased turgor (P) in young leaves. Cell wall properties (elasticity and plasticity) were both stimulated by ozone and this was associated with increased leaf expansion. A new mechanism is proposed which suggests that O<sub>3</sub> may act directly on the cell wall, attacking polysaccharides in the wall that result in altered cell wall properties and leaf growth. O<sub>3</sub> episodes increased leaf loss, elevated CO<sub>2</sub> delayed abscission and O<sub>3</sub> was less effective at accelerating leaf loss in elevated CO<sub>2</sub>. Overall CO<sub>2</sub> increased growth, O<sub>3</sub> caused decreases and the treatment combination gave intermediate effects. Thus O<sub>3</sub> episodes are less likely to be detrimental to P. trichocarpa × P. deltoides in the CO<sub>2</sub> concentrations of the future.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Gardner</LastName><ForeName>Simon D L</ForeName><Initials>SDL</Initials><AffiliationInfo><Affiliation>School of Biological Sciences, University of Sussex, Falmer, East Sussex, BN1 9QG, UK.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Freer-Smith</LastName><ForeName>Peter H</ForeName><Initials>PH</Initials><AffiliationInfo><Affiliation>Forest Research, Alice Holt Lodge, Wrecclesham, FARNHAM, Surrey, GU10 4LH, UK.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Tucker</LastName><ForeName>J</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>School of Biological Sciences, Bassett Crescent East, University of Southampton, SO16 7PX, UK.Corresponding author. Email.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Taylor</LastName><ForeName>Gail</ForeName><Initials>G</Initials><AffiliationInfo><Affiliation>School of Biological Sciences, Bassett Crescent East, University of Southampton, SO16 7PX, UK.Corresponding author. Email.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>Australia</Country><MedlineTA>Funct Plant Biol</MedlineTA><NlmUniqueID>101154361</NlmUniqueID><ISSNLinking>1445-4416</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2004</Year><Month>07</Month><Day>16</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2005</Year><Month>01</Month><Day>13</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2020</Year><Month>7</Month><Day>22</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2005</Year><Month>5</Month><Day>1</Day><Hour>0</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2005</Year><Month>5</Month><Day>1</Day><Hour>0</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">32689126</ArticleId><ArticleId IdType="pii">FP04131</ArticleId><ArticleId IdType="doi">10.1071/FP04131</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Royaume-Uni</li></country><region><li>Angleterre</li><li>Sussex de l'Est</li></region><settlement><li>Brighton</li><li>Falmer</li></settlement><orgName><li>Université du Sussex</li></orgName></list><tree><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Gardner, Simon D L" sort="Gardner, Simon D L" uniqKey="Gardner S" first="Simon D L" last="Gardner">Simon D L. Gardner</name></region><name sortKey="Freer Smith, Peter H" sort="Freer Smith, Peter H" uniqKey="Freer Smith P" first="Peter H" last="Freer-Smith">Peter H. Freer-Smith</name><name sortKey="Taylor, Gail" sort="Taylor, Gail" uniqKey="Taylor G" first="Gail" last="Taylor">Gail Taylor</name><name sortKey="Tucker, J" sort="Tucker, J" uniqKey="Tucker J" first="J" last="Tucker">J. Tucker</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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