Poplar saplings exposed to recurring temperature shifts of different amplitude exhibit differences in leaf gas exchange and growth despite equal mean temperature.
Identifieur interne : 002095 ( Main/Exploration ); précédent : 002094; suivant : 002096Poplar saplings exposed to recurring temperature shifts of different amplitude exhibit differences in leaf gas exchange and growth despite equal mean temperature.
Auteurs : Sofia Cerasoli [Portugal] ; Timothy Wertin [États-Unis] ; Mary Anne Mcguire [États-Unis] ; Ana Rodrigues [Portugal] ; Doug P. Aubrey [États-Unis] ; João Santos Pereira [Portugal] ; Robert O. Teskey [États-Unis]Source :
- AoB PLANTS [ 2041-2851 ] ; 2014.
Abstract
Most investigations of plant responses to changes in temperature have focused on a constant increase in mean day/night temperature without considering how differences in temperature cycles can affect physiological processes and growth. To test the effects of changes in growth temperature on foliar carbon balance and plant growth, we repeatedly exposed poplar saplings (Populus deltoides × nigra) to temperature cycles consisting of 5 days of a moderate (M, +5 °C) or extreme (E, +10 °C) increase in temperature followed by 5 days of a moderate (M, -5 °C) or extreme (E, -10 °C) decrease in temperature, with respect to a control treatment (C, 23.4 °C). The temperature treatments had the same mean temperature over each warm and cool cycle and over the entire study. Our goal was to examine the influence of recurring temperature shifts on growth. Net photosynthesis (A) was relatively insensitive to changes in growth temperature (from 20 to 35 °C), suggesting a broad range of optimum temperature for photosynthesis. Leaf respiration (R) exhibited substantial acclimation to temperature, having nearly the same rate at 13 °C as at 33 °C. There was no evidence that preconditioning through temperature cycles affected the response of A or R to treatment temperature fluctuations. Averaged across the complete warm/cool temperature cycle, the A : R ratio did not differ among the temperature treatments. While foliar carbon balance was not affected, the temperature treatments significantly affected growth. Whole-plant biomass was 1.5 times greater in the M treatment relative to the C treatment. Carbon allocation was also affected with shoot volume and biomass greater in the M and E treatments than in the C treatment. Our findings indicate that temperature fluctuations can have important effects on growth, though there were few effects on leaf gas exchange, and can help explain differences in growth that are not correlated with mean growth temperature.
DOI: 10.1093/aobpla/plu018
PubMed: 24876300
PubMed Central: PMC4029210
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Teskey</name><affiliation wicri:level="2"><nlm:affiliation>Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA</wicri:regionArea><placeName><region type="state">Géorgie (États-Unis)</region></placeName></affiliation></author></analytic><series><title level="j">AoB PLANTS</title><idno type="ISSN">2041-2851</idno><imprint><date when="2014" type="published">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Most investigations of plant responses to changes in temperature have focused on a constant increase in mean day/night temperature without considering how differences in temperature cycles can affect physiological processes and growth. To test the effects of changes in growth temperature on foliar carbon balance and plant growth, we repeatedly exposed poplar saplings (Populus deltoides × nigra) to temperature cycles consisting of 5 days of a moderate (M, +5 °C) or extreme (E, +10 °C) increase in temperature followed by 5 days of a moderate (M, -5 °C) or extreme (E, -10 °C) decrease in temperature, with respect to a control treatment (C, 23.4 °C). The temperature treatments had the same mean temperature over each warm and cool cycle and over the entire study. Our goal was to examine the influence of recurring temperature shifts on growth. Net photosynthesis (A) was relatively insensitive to changes in growth temperature (from 20 to 35 °C), suggesting a broad range of optimum temperature for photosynthesis. Leaf respiration (R) exhibited substantial acclimation to temperature, having nearly the same rate at 13 °C as at 33 °C. There was no evidence that preconditioning through temperature cycles affected the response of A or R to treatment temperature fluctuations. Averaged across the complete warm/cool temperature cycle, the A : R ratio did not differ among the temperature treatments. While foliar carbon balance was not affected, the temperature treatments significantly affected growth. Whole-plant biomass was 1.5 times greater in the M treatment relative to the C treatment. Carbon allocation was also affected with shoot volume and biomass greater in the M and E treatments than in the C treatment. Our findings indicate that temperature fluctuations can have important effects on growth, though there were few effects on leaf gas exchange, and can help explain differences in growth that are not correlated with mean growth temperature. </div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">24876300</PMID><DateCompleted><Year>2014</Year><Month>05</Month><Day>30</Day></DateCompleted><DateRevised><Year>2020</Year><Month>10</Month><Day>01</Day></DateRevised><Article PubModel="Electronic"><Journal><ISSN IssnType="Print">2041-2851</ISSN><JournalIssue CitedMedium="Print"><Volume>6</Volume><PubDate><Year>2014</Year><Month>Apr</Month><Day>11</Day></PubDate></JournalIssue><Title>AoB PLANTS</Title><ISOAbbreviation>AoB Plants</ISOAbbreviation></Journal><ArticleTitle>Poplar saplings exposed to recurring temperature shifts of different amplitude exhibit differences in leaf gas exchange and growth despite equal mean temperature.</ArticleTitle><ELocationID EIdType="doi" ValidYN="Y">10.1093/aobpla/plu018</ELocationID><ELocationID EIdType="pii" ValidYN="Y">plu018</ELocationID><Abstract><AbstractText>Most investigations of plant responses to changes in temperature have focused on a constant increase in mean day/night temperature without considering how differences in temperature cycles can affect physiological processes and growth. To test the effects of changes in growth temperature on foliar carbon balance and plant growth, we repeatedly exposed poplar saplings (Populus deltoides × nigra) to temperature cycles consisting of 5 days of a moderate (M, +5 °C) or extreme (E, +10 °C) increase in temperature followed by 5 days of a moderate (M, -5 °C) or extreme (E, -10 °C) decrease in temperature, with respect to a control treatment (C, 23.4 °C). The temperature treatments had the same mean temperature over each warm and cool cycle and over the entire study. Our goal was to examine the influence of recurring temperature shifts on growth. Net photosynthesis (A) was relatively insensitive to changes in growth temperature (from 20 to 35 °C), suggesting a broad range of optimum temperature for photosynthesis. Leaf respiration (R) exhibited substantial acclimation to temperature, having nearly the same rate at 13 °C as at 33 °C. There was no evidence that preconditioning through temperature cycles affected the response of A or R to treatment temperature fluctuations. Averaged across the complete warm/cool temperature cycle, the A : R ratio did not differ among the temperature treatments. While foliar carbon balance was not affected, the temperature treatments significantly affected growth. Whole-plant biomass was 1.5 times greater in the M treatment relative to the C treatment. Carbon allocation was also affected with shoot volume and biomass greater in the M and E treatments than in the C treatment. Our findings indicate that temperature fluctuations can have important effects on growth, though there were few effects on leaf gas exchange, and can help explain differences in growth that are not correlated with mean growth temperature. </AbstractText><CopyrightInformation>Published by Oxford University Press on behalf of the Annals of Botany Company.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Cerasoli</LastName><ForeName>Sofia</ForeName><Initials>S</Initials><AffiliationInfo><Affiliation>School of Agriculture, Forest Research Centre, Technical University of Lisbon, Lisboa, Portugal.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Wertin</LastName><ForeName>Timothy</ForeName><Initials>T</Initials><AffiliationInfo><Affiliation>Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, USA Institute for Genomic Biology, University of Illinois, Urbana, IL 61801, USA twertin@illinois.edu.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>McGuire</LastName><ForeName>Mary Anne</ForeName><Initials>MA</Initials><AffiliationInfo><Affiliation>Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Rodrigues</LastName><ForeName>Ana</ForeName><Initials>A</Initials><AffiliationInfo><Affiliation>School of Agriculture, Forest Research Centre, Technical University of Lisbon, Lisboa, Portugal.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Aubrey</LastName><ForeName>Doug P</ForeName><Initials>DP</Initials><AffiliationInfo><Affiliation>Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, USA Department of Biology, Georgia Southern University, Statesboro, GA, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Pereira</LastName><ForeName>João Santos</ForeName><Initials>JS</Initials><AffiliationInfo><Affiliation>School of Agriculture, Forest Research Centre, Technical University of Lisbon, Lisboa, Portugal.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Teskey</LastName><ForeName>Robert O</ForeName><Initials>RO</Initials><AffiliationInfo><Affiliation>Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, USA.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2014</Year><Month>04</Month><Day>11</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>AoB Plants</MedlineTA><NlmUniqueID>101539425</NlmUniqueID></MedlineJournalInfo><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">A : R ratio</Keyword><Keyword MajorTopicYN="N">Populus deltoides × nigra.</Keyword><Keyword MajorTopicYN="N">carbon allocation</Keyword><Keyword MajorTopicYN="N">leaf proteins</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2014</Year><Month>5</Month><Day>31</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2014</Year><Month>5</Month><Day>31</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2014</Year><Month>5</Month><Day>31</Day><Hour>6</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>epublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">24876300</ArticleId><ArticleId IdType="pii">plu018</ArticleId><ArticleId IdType="doi">10.1093/aobpla/plu018</ArticleId><ArticleId IdType="pmc">PMC4029210</ArticleId></ArticleIdList><ReferenceList><Reference><Citation>Glob Chang Biol. 2013 Feb;19(2):517-28</Citation><ArticleIdList><ArticleId 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first="Timothy" last="Wertin">Timothy Wertin</name></region><name sortKey="Aubrey, Doug P" sort="Aubrey, Doug P" uniqKey="Aubrey D" first="Doug P" last="Aubrey">Doug P. 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