Variation in nitrogen supply changes water-use efficiency of Pseudotsuga menziesii and Populus x euroamericana; a comparison of three approaches to determine water-use efficiency.
Identifieur interne : 004168 ( Main/Exploration ); précédent : 004167; suivant : 004169Variation in nitrogen supply changes water-use efficiency of Pseudotsuga menziesii and Populus x euroamericana; a comparison of three approaches to determine water-use efficiency.
Auteurs : Francesco Ripullone [Italie] ; Marco Lauteri ; Giacomo Grassi ; Mariana Amato ; Marco BorghettiSource :
- Tree physiology [ 0829-318X ] ; 2004.
Descripteurs français
- KwdFr :
- MESH :
- physiologie : Arbres, Azote, Eau, Feuilles de plante, Populus, Pseudotsuga, Transpiration des plantes.
- Biomasse.
English descriptors
- KwdEn :
- MESH :
- chemical , physiology : Nitrogen, Water.
- physiology : Plant Leaves, Plant Transpiration, Populus, Pseudotsuga, Trees.
- Biomass.
Abstract
We studied the effects of three nitrogen (N) supply rates (low, intermediate and high) on Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings and poplar clone "I-214" (Populus x euroamericana (Dole) Guinier) cuttings growing in mini-stands. Our specific objectives were to: (1) evaluate the effects of N supply on water-use efficiency (WUE) and biomass production; (2) determine if N affects WUE through control of carbon assimilation rates or through stomatal control of water loss; and (3) compare three methods of estimating WUE: one short-term method (WUE(i), based on gas exchange measurements) and two long-term methods (WUE(T), based on the ratio between biomass production and transpired water, and Delta, based on leaf carbon isotope discrimination tested as a proxy of WUE). In both species, biomass production, WUE(i) and WUE(T) increased with increasing N supply, but there was no effect of N supply on either transpiration or stomatal conductance and Delta was negatively related to leaf N concentration. Plots of Delta versus both WUE(i) and WUE(T) revealed negative trends, but the regression between WUE(i) and Delta was significant only for Douglas-fir, and the regression between WUE(T) and Delta was significant only for poplar. Thus, the mechanisms underlying the response of WUE to N supply were mainly related to a positive effect of N supply on photosynthetic rates. The data confirm that carbon isotope discrimination may be a useful proxy of WUE. The finding that N availability enhances both biomass production and WUE may have practical implications in regions where these factors impose constraints on forest productivity.
DOI: 10.1093/treephys/24.6.671
PubMed: 15059767
Affiliations:
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a comparison of three approaches to determine water-use efficiency.</title><author><name sortKey="Ripullone, Francesco" sort="Ripullone, Francesco" uniqKey="Ripullone F" first="Francesco" last="Ripullone">Francesco Ripullone</name><affiliation wicri:level="1"><nlm:affiliation>Dipartimento di Produzione Vegetale, Università della Basilicata, 85100 Potenza, Italy. rf464agr@unibas.it</nlm:affiliation><country xml:lang="fr">Italie</country><wicri:regionArea>Dipartimento di Produzione Vegetale, Università della Basilicata, 85100 Potenza</wicri:regionArea><wicri:noRegion>85100 Potenza</wicri:noRegion></affiliation></author><author><name sortKey="Lauteri, Marco" sort="Lauteri, Marco" uniqKey="Lauteri M" first="Marco" last="Lauteri">Marco Lauteri</name></author><author><name sortKey="Grassi, Giacomo" sort="Grassi, Giacomo" uniqKey="Grassi G" first="Giacomo" last="Grassi">Giacomo Grassi</name></author><author><name sortKey="Amato, Mariana" sort="Amato, Mariana" uniqKey="Amato M" first="Mariana" last="Amato">Mariana Amato</name></author><author><name sortKey="Borghetti, Marco" sort="Borghetti, Marco" uniqKey="Borghetti M" first="Marco" last="Borghetti">Marco Borghetti</name></author></analytic><series><title level="j">Tree physiology</title><idno type="ISSN">0829-318X</idno><imprint><date when="2004" type="published">2004</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Biomass (MeSH)</term><term>Nitrogen (physiology)</term><term>Plant Leaves (physiology)</term><term>Plant Transpiration (physiology)</term><term>Populus (physiology)</term><term>Pseudotsuga (physiology)</term><term>Trees (physiology)</term><term>Water (physiology)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Arbres (physiologie)</term><term>Azote (physiologie)</term><term>Biomasse (MeSH)</term><term>Eau (physiologie)</term><term>Feuilles de plante (physiologie)</term><term>Populus (physiologie)</term><term>Pseudotsuga (physiologie)</term><term>Transpiration des plantes (physiologie)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="physiology" xml:lang="en"><term>Nitrogen</term><term>Water</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Arbres</term><term>Azote</term><term>Eau</term><term>Feuilles de plante</term><term>Populus</term><term>Pseudotsuga</term><term>Transpiration des plantes</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Plant Leaves</term><term>Plant Transpiration</term><term>Populus</term><term>Pseudotsuga</term><term>Trees</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Biomass</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Biomasse</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We studied the effects of three nitrogen (N) supply rates (low, intermediate and high) on Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings and poplar clone "I-214" (Populus x euroamericana (Dole) Guinier) cuttings growing in mini-stands. Our specific objectives were to: (1) evaluate the effects of N supply on water-use efficiency (WUE) and biomass production; (2) determine if N affects WUE through control of carbon assimilation rates or through stomatal control of water loss; and (3) compare three methods of estimating WUE: one short-term method (WUE(i), based on gas exchange measurements) and two long-term methods (WUE(T), based on the ratio between biomass production and transpired water, and Delta, based on leaf carbon isotope discrimination tested as a proxy of WUE). In both species, biomass production, WUE(i) and WUE(T) increased with increasing N supply, but there was no effect of N supply on either transpiration or stomatal conductance and Delta was negatively related to leaf N concentration. Plots of Delta versus both WUE(i) and WUE(T) revealed negative trends, but the regression between WUE(i) and Delta was significant only for Douglas-fir, and the regression between WUE(T) and Delta was significant only for poplar. Thus, the mechanisms underlying the response of WUE to N supply were mainly related to a positive effect of N supply on photosynthetic rates. The data confirm that carbon isotope discrimination may be a useful proxy of WUE. The finding that N availability enhances both biomass production and WUE may have practical implications in regions where these factors impose constraints on forest productivity.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">15059767</PMID><DateCompleted><Year>2005</Year><Month>12</Month><Day>28</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>24</Volume><Issue>6</Issue><PubDate><Year>2004</Year><Month>Jun</Month></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Variation in nitrogen supply changes water-use efficiency of Pseudotsuga menziesii and Populus x euroamericana; a comparison of three approaches to determine water-use efficiency.</ArticleTitle><Pagination><MedlinePgn>671-9</MedlinePgn></Pagination><Abstract><AbstractText>We studied the effects of three nitrogen (N) supply rates (low, intermediate and high) on Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings and poplar clone "I-214" (Populus x euroamericana (Dole) Guinier) cuttings growing in mini-stands. Our specific objectives were to: (1) evaluate the effects of N supply on water-use efficiency (WUE) and biomass production; (2) determine if N affects WUE through control of carbon assimilation rates or through stomatal control of water loss; and (3) compare three methods of estimating WUE: one short-term method (WUE(i), based on gas exchange measurements) and two long-term methods (WUE(T), based on the ratio between biomass production and transpired water, and Delta, based on leaf carbon isotope discrimination tested as a proxy of WUE). In both species, biomass production, WUE(i) and WUE(T) increased with increasing N supply, but there was no effect of N supply on either transpiration or stomatal conductance and Delta was negatively related to leaf N concentration. Plots of Delta versus both WUE(i) and WUE(T) revealed negative trends, but the regression between WUE(i) and Delta was significant only for Douglas-fir, and the regression between WUE(T) and Delta was significant only for poplar. Thus, the mechanisms underlying the response of WUE to N supply were mainly related to a positive effect of N supply on photosynthetic rates. The data confirm that carbon isotope discrimination may be a useful proxy of WUE. 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