Research note: Can decreased transpiration limit plant nitrogen acquisition in elevated CO2?
Identifieur interne : 004536 ( Main/Exploration ); précédent : 004535; suivant : 004537Research note: Can decreased transpiration limit plant nitrogen acquisition in elevated CO2?
Auteurs : Evan P. Mcdonald [États-Unis] ; John E. Erickson [États-Unis] ; Eric L. Kruger [États-Unis]Source :
- Functional plant biology : FPB [ 1445-4416 ] ; 2002.
Abstract
N acquisition often lags behind accelerated C gain in plants exposed to CO2-enriched atmospheres. To help resolve the causes of this lag, we considered its possible link with stomatal closure, a common first-order response to elevated CO2 that can decrease transpiration. Specifically, we tested the hypothesis that declines in transpiration, and hence mass flow of soil solution, can decrease delivery of mobile N to the root and thereby limit plant N acquisition. We altered transpiration by manipulating relative humidity (RH) and atmospheric [CO2]. During a 7-d period, we grew potted cottonwood (Populus deltoides Bartr.) trees in humidified (76% RH) and non-humidified (43% RH) glasshouses ventilated with either CO2-enriched or non-enriched air (~1000 vs ~380μmol mol-1). We monitored effects of elevated humidity and/or CO2 on stomatal conductance, whole-plant transpiration, plant biomass gain, and N accumulation. To facilitate the latter, NO3- enriched in 15N (5 atom%) was added to all pots at the outset of the experiment. Transpiration and 15N accumulation decreased when either CO2 or humidity were elevated. The disparity between N accumulation and accelerated C gain in elevated CO2 led to a 19% decrease in shoot N concentration relative to ambient CO2. Across all treatments, 15N gain was positively correlated with root mass (P<0.0001), and a significant portion of the remaining variation (44%) was positively related to transpiration per unit root mass. At a given humidity, transpiration per unit leaf area was positively related to stomatal conductance. Thus, declines in plant N concentration and/or content under CO2 enrichment may be attributable in part to associated decreases in stomatal conductance and transpiration.
DOI: 10.1071/FP02007
PubMed: 32689563
Affiliations:
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Erickson</name><affiliation wicri:level="2"><nlm:affiliation>Department of Forest Ecology and Management, University of Wisconsin - Madison, WI 53706, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Forest Ecology and Management, University of Wisconsin - Madison, WI 53706</wicri:regionArea><placeName><region type="state">Wisconsin</region></placeName></affiliation></author><author><name sortKey="Kruger, Eric L" sort="Kruger, Eric L" uniqKey="Kruger E" first="Eric L" last="Kruger">Eric L. Kruger</name><affiliation wicri:level="1"><nlm:affiliation>Department of Forest Ecology and Management, University of Wisconsin - Madison, WI 53706, USA.Corresponding author; email: elkruger@facstaff.wisc.edu.</nlm:affiliation><country wicri:rule="url">États-Unis</country></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2002">2002</date><idno type="RBID">pubmed:32689563</idno><idno type="pmid">32689563</idno><idno type="doi">10.1071/FP02007</idno><idno type="wicri:Area/Main/Corpus">004614</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">004614</idno><idno type="wicri:Area/Main/Curation">004614</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">004614</idno><idno type="wicri:Area/Main/Exploration">004614</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Research note: Can decreased transpiration limit plant nitrogen acquisition in elevated CO2?</title><author><name sortKey="Mcdonald, Evan P" sort="Mcdonald, Evan P" uniqKey="Mcdonald E" first="Evan P" last="Mcdonald">Evan P. Mcdonald</name><affiliation wicri:level="2"><nlm:affiliation>Forestry Sciences Laboratory, US Department of Agriculture Forest Service, Rhinelander, WI 54501, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Forestry Sciences Laboratory, US Department of Agriculture Forest Service, Rhinelander, WI 54501</wicri:regionArea><placeName><region type="state">Wisconsin</region></placeName></affiliation></author><author><name sortKey="Erickson, John E" sort="Erickson, John E" uniqKey="Erickson J" first="John E" last="Erickson">John E. Erickson</name><affiliation wicri:level="2"><nlm:affiliation>Department of Forest Ecology and Management, University of Wisconsin - Madison, WI 53706, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Forest Ecology and Management, University of Wisconsin - Madison, WI 53706</wicri:regionArea><placeName><region type="state">Wisconsin</region></placeName></affiliation></author><author><name sortKey="Kruger, Eric L" sort="Kruger, Eric L" uniqKey="Kruger E" first="Eric L" last="Kruger">Eric L. Kruger</name><affiliation wicri:level="1"><nlm:affiliation>Department of Forest Ecology and Management, University of Wisconsin - Madison, WI 53706, USA.Corresponding author; email: elkruger@facstaff.wisc.edu.</nlm:affiliation><country wicri:rule="url">États-Unis</country></affiliation></author></analytic><series><title level="j">Functional plant biology : FPB</title><idno type="eISSN">1445-4416</idno><imprint><date when="2002" type="published">2002</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">N acquisition often lags behind accelerated C gain in plants exposed to CO2-enriched atmospheres. To help resolve the causes of this lag, we considered its possible link with stomatal closure, a common first-order response to elevated CO2 that can decrease transpiration. Specifically, we tested the hypothesis that declines in transpiration, and hence mass flow of soil solution, can decrease delivery of mobile N to the root and thereby limit plant N acquisition. We altered transpiration by manipulating relative humidity (RH) and atmospheric [CO2]. During a 7-d period, we grew potted cottonwood (Populus deltoides Bartr.) trees in humidified (76% RH) and non-humidified (43% RH) glasshouses ventilated with either CO2-enriched or non-enriched air (~1000 vs ~380μmol mol<sup>-1</sup>). We monitored effects of elevated humidity and/or CO2 on stomatal conductance, whole-plant transpiration, plant biomass gain, and N accumulation. To facilitate the latter, NO3<sup>-</sup> enriched in <sup>15</sup>N (5 atom%) was added to all pots at the outset of the experiment. Transpiration and <sup>15</sup>N accumulation decreased when either CO2 or humidity were elevated. The disparity between N accumulation and accelerated C gain in elevated CO2 led to a 19% decrease in shoot N concentration relative to ambient CO2. Across all treatments, <sup>15</sup>N gain was positively correlated with root mass (P<0.0001), and a significant portion of the remaining variation (44%) was positively related to transpiration per unit root mass. At a given humidity, transpiration per unit leaf area was positively related to stomatal conductance. Thus, declines in plant N concentration and/or content under CO2 enrichment may be attributable in part to associated decreases in stomatal conductance and transpiration.</div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">32689563</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>29</Volume><Issue>9</Issue><PubDate><Year>2002</Year><Month>Aug</Month></PubDate></JournalIssue><Title>Functional plant biology : FPB</Title><ISOAbbreviation>Funct Plant Biol</ISOAbbreviation></Journal><ArticleTitle>Research note: Can decreased transpiration limit plant nitrogen acquisition in elevated CO2?</ArticleTitle><Pagination><MedlinePgn>1115-1120</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1071/FP02007</ELocationID><Abstract><AbstractText>N acquisition often lags behind accelerated C gain in plants exposed to CO2-enriched atmospheres. To help resolve the causes of this lag, we considered its possible link with stomatal closure, a common first-order response to elevated CO2 that can decrease transpiration. Specifically, we tested the hypothesis that declines in transpiration, and hence mass flow of soil solution, can decrease delivery of mobile N to the root and thereby limit plant N acquisition. We altered transpiration by manipulating relative humidity (RH) and atmospheric [CO2]. During a 7-d period, we grew potted cottonwood (Populus deltoides Bartr.) trees in humidified (76% RH) and non-humidified (43% RH) glasshouses ventilated with either CO2-enriched or non-enriched air (~1000 vs ~380μmol mol<sup>-1</sup>). We monitored effects of elevated humidity and/or CO2 on stomatal conductance, whole-plant transpiration, plant biomass gain, and N accumulation. To facilitate the latter, NO3<sup>-</sup> enriched in <sup>15</sup>N (5 atom%) was added to all pots at the outset of the experiment. Transpiration and <sup>15</sup>N accumulation decreased when either CO2 or humidity were elevated. The disparity between N accumulation and accelerated C gain in elevated CO2 led to a 19% decrease in shoot N concentration relative to ambient CO2. Across all treatments, <sup>15</sup>N gain was positively correlated with root mass (P<0.0001), and a significant portion of the remaining variation (44%) was positively related to transpiration per unit root mass. At a given humidity, transpiration per unit leaf area was positively related to stomatal conductance. Thus, declines in plant N concentration and/or content under CO2 enrichment may be attributable in part to associated decreases in stomatal conductance and transpiration.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>McDonald</LastName><ForeName>Evan P</ForeName><Initials>EP</Initials><AffiliationInfo><Affiliation>Forestry Sciences Laboratory, US Department of Agriculture Forest Service, Rhinelander, WI 54501, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Erickson</LastName><ForeName>John E</ForeName><Initials>JE</Initials><AffiliationInfo><Affiliation>Department of Forest Ecology and Management, University of Wisconsin - Madison, WI 53706, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Kruger</LastName><ForeName>Eric L</ForeName><Initials>EL</Initials><AffiliationInfo><Affiliation>Department of Forest Ecology and Management, University of Wisconsin - Madison, WI 53706, USA.Corresponding author; email: elkruger@facstaff.wisc.edu.</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="entrez"><Year>2020</Year><Month>7</Month><Day>22</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2002</Year><Month>8</Month><Day>1</Day><Hour>0</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2002</Year><Month>8</Month><Day>1</Day><Hour>0</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">32689563</ArticleId><ArticleId IdType="pii">FP02007</ArticleId><ArticleId IdType="doi">10.1071/FP02007</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country><region><li>Wisconsin</li></region></list><tree><country name="États-Unis"><region name="Wisconsin"><name sortKey="Mcdonald, Evan P" sort="Mcdonald, Evan P" uniqKey="Mcdonald E" first="Evan P" last="Mcdonald">Evan P. Mcdonald</name></region><name sortKey="Erickson, John E" sort="Erickson, John E" uniqKey="Erickson J" first="John E" last="Erickson">John E. Erickson</name><name sortKey="Kruger, Eric L" sort="Kruger, Eric L" uniqKey="Kruger E" first="Eric L" last="Kruger">Eric L. Kruger</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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