Shoot growth dynamics and photosynthetic response to increased nitrogen availability in the alpine willow Salix glauca.
Identifieur interne : 002319 ( Main/Corpus ); précédent : 002318; suivant : 002320Shoot growth dynamics and photosynthetic response to increased nitrogen availability in the alpine willow Salix glauca.
Auteurs : W D Bowman ; R T ConantSource :
- Oecologia [ 1432-1939 ] ; 1994.
Abstract
Plants subjected to increases in the supply of resource(s) limiting growth may allocate more of those resources to existing leaves, increasing photosynthetic capacity, and/or to production of more leaves, increasing whole-plant photosynthesis. The responses of three populations of the alpine willow, Salix glauca, growing along an alpine topographic sequence representing a gradient in soil moisture and organic matter, and thus potential N supply, to N amendments, were measured over two growing seasons, to elucidate patterns of leaf versus shoot photosynthetic responses. Leaf-(foliar N, photosynthesis rates, photosynthetic N-use efficiency) and shoot-(leaf area per shoot, number of leaves per shoot, stem weight, N resorption efficiency) level measurements were made to examine the spatial and temporal variation in these potential responses to increased N availability. The predominant response of the willows to N fertilization was at the shoot-level, by production of greater leaf area per shoot. Greater leaf area occurred due to production of larger leaves in both years of the experiment and to production of more leaves during the second year of fertilization treatment. Significant leaflevel photosynthetic response occurred only during the first year of treatment, and only in the dry meadow population. Variation in photosynthesis rates was related more to variation in stomatal conductance than to foliar N concentration. Stomatal conductance in turn was significantly related to N fertilization. Differences among the populations in photosynthesis, foliar N, leaf production, and responses to N fertilization indicate N availability may be lowest in the dry meadow population, and highest in the ridge population. This result is contrary to the hypothesis that a gradient of plant available N corresponds with a snowpack/topographic gradient.
DOI: 10.1007/BF00317912
PubMed: 28313593
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Shoot growth dynamics and photosynthetic response to increased nitrogen availability in the alpine willow Salix glauca.</title><author><name sortKey="Bowman, W D" sort="Bowman, W D" uniqKey="Bowman W" first="W D" last="Bowman">W D Bowman</name><affiliation><nlm:affiliation>Mountain Research Station, Institute of Arctic and Alpine Research and Department of Environmental, Population and Organismic Biology, University of Colorado, 80309-0334, Boulder, CO, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Conant, R T" sort="Conant, R T" uniqKey="Conant R" first="R T" last="Conant">R T Conant</name><affiliation><nlm:affiliation>Mountain Research Station, Institute of Arctic and Alpine Research and Department of Environmental, Population and Organismic Biology, University of Colorado, 80309-0334, Boulder, CO, USA.</nlm:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="1994">1994</date><idno type="RBID">pubmed:28313593</idno><idno type="pmid">28313593</idno><idno type="doi">10.1007/BF00317912</idno><idno type="wicri:Area/Main/Corpus">002319</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">002319</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Shoot growth dynamics and photosynthetic response to increased nitrogen availability in the alpine willow Salix glauca.</title><author><name sortKey="Bowman, W D" sort="Bowman, W D" uniqKey="Bowman W" first="W D" last="Bowman">W D Bowman</name><affiliation><nlm:affiliation>Mountain Research Station, Institute of Arctic and Alpine Research and Department of Environmental, Population and Organismic Biology, University of Colorado, 80309-0334, Boulder, CO, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Conant, R T" sort="Conant, R T" uniqKey="Conant R" first="R T" last="Conant">R T Conant</name><affiliation><nlm:affiliation>Mountain Research Station, Institute of Arctic and Alpine Research and Department of Environmental, Population and Organismic Biology, University of Colorado, 80309-0334, Boulder, CO, USA.</nlm:affiliation></affiliation></author></analytic><series><title level="j">Oecologia</title><idno type="eISSN">1432-1939</idno><imprint><date when="1994" type="published">1994</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Plants subjected to increases in the supply of resource(s) limiting growth may allocate more of those resources to existing leaves, increasing photosynthetic capacity, and/or to production of more leaves, increasing whole-plant photosynthesis. The responses of three populations of the alpine willow, Salix glauca, growing along an alpine topographic sequence representing a gradient in soil moisture and organic matter, and thus potential N supply, to N amendments, were measured over two growing seasons, to elucidate patterns of leaf versus shoot photosynthetic responses. Leaf-(foliar N, photosynthesis rates, photosynthetic N-use efficiency) and shoot-(leaf area per shoot, number of leaves per shoot, stem weight, N resorption efficiency) level measurements were made to examine the spatial and temporal variation in these potential responses to increased N availability. The predominant response of the willows to N fertilization was at the shoot-level, by production of greater leaf area per shoot. Greater leaf area occurred due to production of larger leaves in both years of the experiment and to production of more leaves during the second year of fertilization treatment. Significant leaflevel photosynthetic response occurred only during the first year of treatment, and only in the dry meadow population. Variation in photosynthesis rates was related more to variation in stomatal conductance than to foliar N concentration. Stomatal conductance in turn was significantly related to N fertilization. Differences among the populations in photosynthesis, foliar N, leaf production, and responses to N fertilization indicate N availability may be lowest in the dry meadow population, and highest in the ridge population. This result is contrary to the hypothesis that a gradient of plant available N corresponds with a snowpack/topographic gradient.</div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">28313593</PMID><DateRevised><Year>2019</Year><Month>11</Month><Day>20</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">1432-1939</ISSN><JournalIssue CitedMedium="Internet"><Volume>97</Volume><Issue>1</Issue><PubDate><Year>1994</Year><Month>Feb</Month></PubDate></JournalIssue><Title>Oecologia</Title><ISOAbbreviation>Oecologia</ISOAbbreviation></Journal><ArticleTitle>Shoot growth dynamics and photosynthetic response to increased nitrogen availability in the alpine willow Salix glauca.</ArticleTitle><Pagination><MedlinePgn>93-99</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1007/BF00317912</ELocationID><Abstract><AbstractText>Plants subjected to increases in the supply of resource(s) limiting growth may allocate more of those resources to existing leaves, increasing photosynthetic capacity, and/or to production of more leaves, increasing whole-plant photosynthesis. The responses of three populations of the alpine willow, Salix glauca, growing along an alpine topographic sequence representing a gradient in soil moisture and organic matter, and thus potential N supply, to N amendments, were measured over two growing seasons, to elucidate patterns of leaf versus shoot photosynthetic responses. Leaf-(foliar N, photosynthesis rates, photosynthetic N-use efficiency) and shoot-(leaf area per shoot, number of leaves per shoot, stem weight, N resorption efficiency) level measurements were made to examine the spatial and temporal variation in these potential responses to increased N availability. The predominant response of the willows to N fertilization was at the shoot-level, by production of greater leaf area per shoot. Greater leaf area occurred due to production of larger leaves in both years of the experiment and to production of more leaves during the second year of fertilization treatment. Significant leaflevel photosynthetic response occurred only during the first year of treatment, and only in the dry meadow population. Variation in photosynthesis rates was related more to variation in stomatal conductance than to foliar N concentration. Stomatal conductance in turn was significantly related to N fertilization. Differences among the populations in photosynthesis, foliar N, leaf production, and responses to N fertilization indicate N availability may be lowest in the dry meadow population, and highest in the ridge population. This result is contrary to the hypothesis that a gradient of plant available N corresponds with a snowpack/topographic gradient.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Bowman</LastName><ForeName>W D</ForeName><Initials>WD</Initials><AffiliationInfo><Affiliation>Mountain Research Station, Institute of Arctic and Alpine Research and Department of Environmental, Population and Organismic Biology, University of Colorado, 80309-0334, Boulder, CO, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Conant</LastName><ForeName>R T</ForeName><Initials>RT</Initials><AffiliationInfo><Affiliation>Mountain Research Station, Institute of Arctic and Alpine Research and Department of Environmental, Population and Organismic Biology, University of Colorado, 80309-0334, Boulder, CO, USA.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>Germany</Country><MedlineTA>Oecologia</MedlineTA><NlmUniqueID>0150372</NlmUniqueID><ISSNLinking>0029-8549</ISSNLinking></MedlineJournalInfo><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Alpine ecosystem</Keyword><Keyword MajorTopicYN="N">Biomass allocation</Keyword><Keyword MajorTopicYN="N">Nitrogen-use efficiency</Keyword><Keyword MajorTopicYN="N">Photosynthesis</Keyword><Keyword MajorTopicYN="N">Salix glauca</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>1993</Year><Month>06</Month><Day>22</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>1993</Year><Month>11</Month><Day>08</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2017</Year><Month>3</Month><Day>18</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>1994</Year><Month>2</Month><Day>1</Day><Hour>0</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>1994</Year><Month>2</Month><Day>1</Day><Hour>0</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">28313593</ArticleId><ArticleId IdType="doi">10.1007/BF00317912</ArticleId><ArticleId IdType="pii">10.1007/BF00317912</ArticleId></ArticleIdList><ReferenceList><Reference><Citation>Oecologia. 1992 Nov;92 (2):236-241</Citation><ArticleIdList><ArticleId IdType="pubmed">28313057</ArticleId></ArticleIdList></Reference><Reference><Citation>Plant Physiol. 1982 Oct;70(4):1066-70</Citation><ArticleIdList><ArticleId IdType="pubmed">16662614</ArticleId></ArticleIdList></Reference><Reference><Citation>Science. 1985 Nov 22;230(4728):895-9</Citation><ArticleIdList><ArticleId IdType="pubmed">17739203</ArticleId></ArticleIdList></Reference><Reference><Citation>Oecologia. 1988 Feb;75(1):1-7</Citation><ArticleIdList><ArticleId IdType="pubmed">28311826</ArticleId></ArticleIdList></Reference><Reference><Citation>Oecologia. 1989 Jan;78(1):9-19</Citation><ArticleIdList><ArticleId IdType="pubmed">28311896</ArticleId></ArticleIdList></Reference><Reference><Citation>Oecologia. 1988 Apr;75(3):348-353</Citation><ArticleIdList><ArticleId IdType="pubmed">28312681</ArticleId></ArticleIdList></Reference><Reference><Citation>Oecologia. 1989 Aug;80(3):341-348</Citation><ArticleIdList><ArticleId IdType="pubmed">28312061</ArticleId></ArticleIdList></Reference><Reference><Citation>Oecologia. 1983 Feb;56(2-3):341-347</Citation><ArticleIdList><ArticleId IdType="pubmed">28310214</ArticleId></ArticleIdList></Reference><Reference><Citation>Oecologia. 1983 Dec;60(3):384-389</Citation><ArticleIdList><ArticleId IdType="pubmed">28310700</ArticleId></ArticleIdList></Reference></ReferenceList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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