The relationship between isoprene emission, CO(2) assimilation and water use efficiency across a range of poplar genotypes.
Identifieur interne : 002C75 ( Main/Exploration ); précédent : 002C74; suivant : 002C76The relationship between isoprene emission, CO(2) assimilation and water use efficiency across a range of poplar genotypes.
Auteurs : Gabriele Guidolotti [Italie] ; Carlo Calfapietra ; Francesco LoretoSource :
- Physiologia plantarum [ 1399-3054 ] ; 2011.
Descripteurs français
- KwdFr :
- Butadiènes (analyse), Cycle du carbone (physiologie), Dioxyde de carbone (métabolisme), Eau (physiologie), Génotype (MeSH), Hémiterpènes (analyse), Pentanes (analyse), Photosynthèse (physiologie), Populus (croissance et développement), Populus (génétique), Populus (physiologie), Stomates de plante (croissance et développement), Stomates de plante (physiologie).
- MESH :
- analyse : Butadiènes, Hémiterpènes, Pentanes.
- croissance et développement : Populus, Stomates de plante.
- génétique : Populus.
- métabolisme : Dioxyde de carbone.
- physiologie : Cycle du carbone, Eau, Photosynthèse, Populus, Stomates de plante.
- Génotype.
English descriptors
- KwdEn :
- Butadienes (analysis), Carbon Cycle (physiology), Carbon Dioxide (metabolism), Genotype (MeSH), Hemiterpenes (analysis), Pentanes (analysis), Photosynthesis (physiology), Plant Stomata (growth & development), Plant Stomata (physiology), Populus (genetics), Populus (growth & development), Populus (physiology), Water (physiology).
- MESH :
- chemical , analysis : Butadienes, Hemiterpenes, Pentanes.
- chemical , metabolism : Carbon Dioxide.
- genetics : Populus.
- growth & development : Plant Stomata, Populus.
- physiology : Carbon Cycle, Photosynthesis, Plant Stomata, Populus, Water.
- Genotype.
Abstract
Poplars (Populus sp.) are among the strongest isoprene (Iso)-emitting plants. Ten poplar genotypes belonging to four different species were grown under the same environmental conditions in a common garden experiment, to study the influence of the genetic variability on Iso emission and on the relationship between Iso and photosynthesis. Photosynthesis ranged from 13 to 20 µmol CO(2) m(-2) s(-1) , whereas Iso emission ranged from 18.2 to 45.2 nmol m(-2) s(-1) . There was no clear association between Iso emission and photosynthesis. In most genotypes, photosynthetic capacity developed earlier than Iso emission capacity. The emission of Iso was inversely correlated with the intercellular CO(2) concentration (C(i) ) and positively correlated with instantaneous water use efficiency. It is speculated that, by regulating C(i) , stomatal opening also indirectly controls Iso emission in poplars. A positive linear correlation between the fraction of recently assimilated carbon emitted as Iso and Iso emission rate was found. The slope of this relationship indicated that each nanomole of Iso emitted requires a fixed fraction of photosynthetic carbon regardless of the intra- and interspecific variability in the Populus genus, and of leaf ontogeny. A comparison with data from recent studies showed that the slope of this relationship increases in drought-stressed leaves. However, this might be explained by an increasing contribution of carbon sources for Iso biosynthesis from stored photosynthates. If this is true, then the amount of carbon directly shunted from photosynthesis into Iso is constant in all poplars and is not influenced by abiotic stresses.
DOI: 10.1111/j.1399-3054.2011.01463.x
PubMed: 21361963
Affiliations:
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développement)</term><term>Populus (génétique)</term><term>Populus (physiologie)</term><term>Stomates de plante (croissance et développement)</term><term>Stomates de plante (physiologie)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Butadienes</term><term>Hemiterpenes</term><term>Pentanes</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Carbon Dioxide</term></keywords><keywords scheme="MESH" qualifier="analyse" xml:lang="fr"><term>Butadiènes</term><term>Hémiterpènes</term><term>Pentanes</term></keywords><keywords scheme="MESH" qualifier="croissance et développement" xml:lang="fr"><term>Populus</term><term>Stomates de plante</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 Stomata</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="génétique" xml:lang="fr"><term>Populus</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Dioxyde de carbone</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Cycle du carbone</term><term>Eau</term><term>Photosynthèse</term><term>Populus</term><term>Stomates de plante</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Carbon Cycle</term><term>Photosynthesis</term><term>Plant Stomata</term><term>Populus</term><term>Water</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Genotype</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Génotype</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Poplars (Populus sp.) are among the strongest isoprene (Iso)-emitting plants. Ten poplar genotypes belonging to four different species were grown under the same environmental conditions in a common garden experiment, to study the influence of the genetic variability on Iso emission and on the relationship between Iso and photosynthesis. Photosynthesis ranged from 13 to 20 µmol CO(2) m(-2) s(-1) , whereas Iso emission ranged from 18.2 to 45.2 nmol m(-2) s(-1) . There was no clear association between Iso emission and photosynthesis. In most genotypes, photosynthetic capacity developed earlier than Iso emission capacity. The emission of Iso was inversely correlated with the intercellular CO(2) concentration (C(i) ) and positively correlated with instantaneous water use efficiency. It is speculated that, by regulating C(i) , stomatal opening also indirectly controls Iso emission in poplars. A positive linear correlation between the fraction of recently assimilated carbon emitted as Iso and Iso emission rate was found. The slope of this relationship indicated that each nanomole of Iso emitted requires a fixed fraction of photosynthetic carbon regardless of the intra- and interspecific variability in the Populus genus, and of leaf ontogeny. A comparison with data from recent studies showed that the slope of this relationship increases in drought-stressed leaves. However, this might be explained by an increasing contribution of carbon sources for Iso biosynthesis from stored photosynthates. If this is true, then the amount of carbon directly shunted from photosynthesis into Iso is constant in all poplars and is not influenced by abiotic stresses.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">21361963</PMID><DateCompleted><Year>2011</Year><Month>12</Month><Day>16</Day></DateCompleted><DateRevised><Year>2013</Year><Month>11</Month><Day>21</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1399-3054</ISSN><JournalIssue CitedMedium="Internet"><Volume>142</Volume><Issue>3</Issue><PubDate><Year>2011</Year><Month>Jul</Month></PubDate></JournalIssue><Title>Physiologia plantarum</Title><ISOAbbreviation>Physiol Plant</ISOAbbreviation></Journal><ArticleTitle>The relationship between isoprene emission, CO(2) assimilation and water use efficiency across a range of poplar genotypes.</ArticleTitle><Pagination><MedlinePgn>297-304</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/j.1399-3054.2011.01463.x</ELocationID><Abstract><AbstractText>Poplars (Populus sp.) are among the strongest isoprene (Iso)-emitting plants. Ten poplar genotypes belonging to four different species were grown under the same environmental conditions in a common garden experiment, to study the influence of the genetic variability on Iso emission and on the relationship between Iso and photosynthesis. Photosynthesis ranged from 13 to 20 µmol CO(2) m(-2) s(-1) , whereas Iso emission ranged from 18.2 to 45.2 nmol m(-2) s(-1) . There was no clear association between Iso emission and photosynthesis. In most genotypes, photosynthetic capacity developed earlier than Iso emission capacity. The emission of Iso was inversely correlated with the intercellular CO(2) concentration (C(i) ) and positively correlated with instantaneous water use efficiency. It is speculated that, by regulating C(i) , stomatal opening also indirectly controls Iso emission in poplars. A positive linear correlation between the fraction of recently assimilated carbon emitted as Iso and Iso emission rate was found. The slope of this relationship indicated that each nanomole of Iso emitted requires a fixed fraction of photosynthetic carbon regardless of the intra- and interspecific variability in the Populus genus, and of leaf ontogeny. A comparison with data from recent studies showed that the slope of this relationship increases in drought-stressed leaves. However, this might be explained by an increasing contribution of carbon sources for Iso biosynthesis from stored photosynthates. 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MajorTopicYN="Y">physiology</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2011</Year><Month>3</Month><Day>3</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2011</Year><Month>3</Month><Day>3</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2011</Year><Month>12</Month><Day>17</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">21361963</ArticleId><ArticleId IdType="doi">10.1111/j.1399-3054.2011.01463.x</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Italie</li></country></list><tree><noCountry><name sortKey="Calfapietra, Carlo" sort="Calfapietra, Carlo" uniqKey="Calfapietra C" first="Carlo" last="Calfapietra">Carlo Calfapietra</name><name sortKey="Loreto, Francesco" sort="Loreto, Francesco" uniqKey="Loreto F" first="Francesco" last="Loreto">Francesco Loreto</name></noCountry><country name="Italie"><noRegion><name sortKey="Guidolotti, Gabriele" sort="Guidolotti, Gabriele" uniqKey="Guidolotti G" first="Gabriele" last="Guidolotti">Gabriele Guidolotti</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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