Comparison of photosynthetic induction and transient limitations during the induction phase in young and mature leaves from three poplar clones.
Identifieur interne : 003874 ( Main/Corpus ); précédent : 003873; suivant : 003875Comparison of photosynthetic induction and transient limitations during the induction phase in young and mature leaves from three poplar clones.
Auteurs : Otmar Urban ; Mirka Sprtová ; Martina Kosvancová ; Ivana Tomásková ; Hartmut K. Lichtenthaler ; Michal V. MarekSource :
- Tree physiology [ 0829-318X ] ; 2008.
English descriptors
- KwdEn :
- Carbon Dioxide (metabolism), Cloning, Organism (MeSH), Light (MeSH), Photosynthesis (MeSH), Plant Leaves (growth & development), Plant Leaves (metabolism), Plant Stomata (metabolism), Populus (genetics), Populus (growth & development), Populus (metabolism), Ribulose-Bisphosphate Carboxylase (metabolism), Time Factors (MeSH).
- MESH :
- chemical , metabolism : Carbon Dioxide, Ribulose-Bisphosphate Carboxylase.
- genetics : Populus.
- growth & development : Plant Leaves, Populus.
- metabolism : Plant Leaves, Plant Stomata, Populus.
- Cloning, Organism, Light, Photosynthesis, Time Factors.
Abstract
We tested the hypothesis that leaf age affects photosynthetic induction, because conductance to CO2 diffusion usually decreases with increasing leaf age. Photosynthetic inductions, primarily determined by the light modulation of Rubisco activity and stomatal opening, were investigated in both young and mature leaves, as defined by leaf plastochron index (LPI), from three poplar clones: Populus alba L., P. nigra L. and P. x euramericana (Dode) Guinier. In all clones, maximum assimilation rates (A max), maximum stomatal conductance (G Smax) and dark respiration rates (RD) were higher in young leaves (LPI = 3-5) than in mature leaves (LPI = 10-14), and A max decreased from P. alba via P. x euramericana to P. nigra. The clones with high photosynthetic capacity had low induction states 60 s after leaf illumination (IS60; indicating a slow initial induction phase), and required less time to reach 90% photosynthetic induction (T90). In contrast, the clone with the lowest photosynthetic capacity (P. nigra) exhibited high IS60 (high initial induction state) but a long induction time (high T90). A comparison of mature leaves with young leaves revealed significantly (P < 0.01) lower IS60 values in mature leaves of P. nigra only, and significantly higher T90 values in mature leaves of P. alba only. In all clones, young leaves exhibited a lower percentage of maximum transient stomatal limitation during photosynthetic induction (4-9%) compared with mature leaves (16-30%). Transient biochemical limitation, assessed on the basis of the time constants of Rubisco activation (tau), was significantly higher in mature leaves than in young leaves of P. alba; whereas there were no significant differences in tau between young and mature leaves of the other poplar clones. Thus, our hypothesis that leaf age affects photosynthetic induction was confirmed at the level of transient stomatal limitation, which was significantly higher in mature leaves than in young leaves in all clones. For the induction parameters IS60, T90 and tau, photosynthetic induction was more clone-specific and was dependent on leaf age only in some cases, an observation that may apply to other tree species.
DOI: 10.1093/treephys/28.8.1189
PubMed: 18519250
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pubmed:18519250Le document en format XML
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Lichtenthaler</name></author><author><name sortKey="Marek, Michal V" sort="Marek, Michal V" uniqKey="Marek M" first="Michal V" last="Marek">Michal V. 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Lichtenthaler</name></author><author><name sortKey="Marek, Michal V" sort="Marek, Michal V" uniqKey="Marek M" first="Michal V" last="Marek">Michal V. Marek</name></author></analytic><series><title level="j">Tree physiology</title><idno type="ISSN">0829-318X</idno><imprint><date when="2008" type="published">2008</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Carbon Dioxide (metabolism)</term><term>Cloning, Organism (MeSH)</term><term>Light (MeSH)</term><term>Photosynthesis (MeSH)</term><term>Plant Leaves (growth & development)</term><term>Plant Leaves (metabolism)</term><term>Plant Stomata (metabolism)</term><term>Populus (genetics)</term><term>Populus (growth & development)</term><term>Populus (metabolism)</term><term>Ribulose-Bisphosphate Carboxylase (metabolism)</term><term>Time Factors (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Carbon Dioxide</term><term>Ribulose-Bisphosphate Carboxylase</term></keywords><keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Populus</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Plant Leaves</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Plant Leaves</term><term>Plant Stomata</term><term>Populus</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Cloning, Organism</term><term>Light</term><term>Photosynthesis</term><term>Time Factors</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We tested the hypothesis that leaf age affects photosynthetic induction, because conductance to CO2 diffusion usually decreases with increasing leaf age. Photosynthetic inductions, primarily determined by the light modulation of Rubisco activity and stomatal opening, were investigated in both young and mature leaves, as defined by leaf plastochron index (LPI), from three poplar clones: Populus alba L., P. nigra L. and P. x euramericana (Dode) Guinier. In all clones, maximum assimilation rates (A max), maximum stomatal conductance (G Smax) and dark respiration rates (RD) were higher in young leaves (LPI = 3-5) than in mature leaves (LPI = 10-14), and A max decreased from P. alba via P. x euramericana to P. nigra. The clones with high photosynthetic capacity had low induction states 60 s after leaf illumination (IS60; indicating a slow initial induction phase), and required less time to reach 90% photosynthetic induction (T90). In contrast, the clone with the lowest photosynthetic capacity (P. nigra) exhibited high IS60 (high initial induction state) but a long induction time (high T90). A comparison of mature leaves with young leaves revealed significantly (P < 0.01) lower IS60 values in mature leaves of P. nigra only, and significantly higher T90 values in mature leaves of P. alba only. In all clones, young leaves exhibited a lower percentage of maximum transient stomatal limitation during photosynthetic induction (4-9%) compared with mature leaves (16-30%). Transient biochemical limitation, assessed on the basis of the time constants of Rubisco activation (tau), was significantly higher in mature leaves than in young leaves of P. alba; whereas there were no significant differences in tau between young and mature leaves of the other poplar clones. Thus, our hypothesis that leaf age affects photosynthetic induction was confirmed at the level of transient stomatal limitation, which was significantly higher in mature leaves than in young leaves in all clones. For the induction parameters IS60, T90 and tau, photosynthetic induction was more clone-specific and was dependent on leaf age only in some cases, an observation that may apply to other tree species.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">18519250</PMID><DateCompleted><Year>2008</Year><Month>09</Month><Day>18</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>28</Volume><Issue>8</Issue><PubDate><Year>2008</Year><Month>Aug</Month></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Comparison of photosynthetic induction and transient limitations during the induction phase in young and mature leaves from three poplar clones.</ArticleTitle><Pagination><MedlinePgn>1189-97</MedlinePgn></Pagination><Abstract><AbstractText>We tested the hypothesis that leaf age affects photosynthetic induction, because conductance to CO2 diffusion usually decreases with increasing leaf age. Photosynthetic inductions, primarily determined by the light modulation of Rubisco activity and stomatal opening, were investigated in both young and mature leaves, as defined by leaf plastochron index (LPI), from three poplar clones: Populus alba L., P. nigra L. and P. x euramericana (Dode) Guinier. In all clones, maximum assimilation rates (A max), maximum stomatal conductance (G Smax) and dark respiration rates (RD) were higher in young leaves (LPI = 3-5) than in mature leaves (LPI = 10-14), and A max decreased from P. alba via P. x euramericana to P. nigra. The clones with high photosynthetic capacity had low induction states 60 s after leaf illumination (IS60; indicating a slow initial induction phase), and required less time to reach 90% photosynthetic induction (T90). In contrast, the clone with the lowest photosynthetic capacity (P. nigra) exhibited high IS60 (high initial induction state) but a long induction time (high T90). A comparison of mature leaves with young leaves revealed significantly (P < 0.01) lower IS60 values in mature leaves of P. nigra only, and significantly higher T90 values in mature leaves of P. alba only. In all clones, young leaves exhibited a lower percentage of maximum transient stomatal limitation during photosynthetic induction (4-9%) compared with mature leaves (16-30%). Transient biochemical limitation, assessed on the basis of the time constants of Rubisco activation (tau), was significantly higher in mature leaves than in young leaves of P. alba; whereas there were no significant differences in tau between young and mature leaves of the other poplar clones. Thus, our hypothesis that leaf age affects photosynthetic induction was confirmed at the level of transient stomatal limitation, which was significantly higher in mature leaves than in young leaves in all clones. For the induction parameters IS60, T90 and tau, photosynthetic induction was more clone-specific and was dependent on leaf age only in some cases, an observation that may apply to other tree species.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Urban</LastName><ForeName>Otmar</ForeName><Initials>O</Initials><AffiliationInfo><Affiliation>Laboratory of Plants Ecological Physiology, Institute of Systems Biology and Ecology AS CR, Porící 3b, Brno, Czech Republic. otmar@usbe.cas.cz</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Sprtová</LastName><ForeName>Mirka</ForeName><Initials>M</Initials></Author><Author ValidYN="Y"><LastName>Kosvancová</LastName><ForeName>Martina</ForeName><Initials>M</Initials></Author><Author ValidYN="Y"><LastName>Tomásková</LastName><ForeName>Ivana</ForeName><Initials>I</Initials></Author><Author ValidYN="Y"><LastName>Lichtenthaler</LastName><ForeName>Hartmut K</ForeName><Initials>HK</Initials></Author><Author ValidYN="Y"><LastName>Marek</LastName><ForeName>Michal V</ForeName><Initials>MV</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>Canada</Country><MedlineTA>Tree Physiol</MedlineTA><NlmUniqueID>100955338</NlmUniqueID><ISSNLinking>0829-318X</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>142M471B3J</RegistryNumber><NameOfSubstance UI="D002245">Carbon Dioxide</NameOfSubstance></Chemical><Chemical><RegistryNumber>EC 4.1.1.39</RegistryNumber><NameOfSubstance UI="D012273">Ribulose-Bisphosphate Carboxylase</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D002245" MajorTopicYN="N">Carbon Dioxide</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D019976" MajorTopicYN="N">Cloning, Organism</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D008027" MajorTopicYN="N">Light</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010788" MajorTopicYN="Y">Photosynthesis</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName><QualifierName UI="Q000254" MajorTopicYN="N">growth & development</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D054046" MajorTopicYN="N">Plant Stomata</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName><QualifierName UI="Q000254" MajorTopicYN="N">growth & development</QualifierName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012273" MajorTopicYN="N">Ribulose-Bisphosphate Carboxylase</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D013997" MajorTopicYN="N">Time Factors</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>2008</Year><Month>6</Month><Day>4</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2008</Year><Month>9</Month><Day>19</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2008</Year><Month>6</Month><Day>4</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">18519250</ArticleId><ArticleId IdType="doi">10.1093/treephys/28.8.1189</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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