Streamside trees: responses of male, female and hybrid cottonwoods to flooding.
Identifieur interne : 003109 ( Main/Exploration ); précédent : 003108; suivant : 003110Streamside trees: responses of male, female and hybrid cottonwoods to flooding.
Auteurs : Julie L. Nielsen [Canada] ; Stewart B. Rood ; David W. Pearce ; Matthew G. Letts ; Hester JiskootSource :
- Tree physiology [ 0829-318X ] ; 2010.
Descripteurs français
- KwdFr :
- MESH :
- croissance et développement : Tiges de plante.
- génétique : Populus.
- physiologie : Feuilles de plante, Populus, Racines de plante.
- Génotype, Hybridation génétique, Inondations, Écosystème.
English descriptors
- KwdEn :
- MESH :
- genetics : Populus.
- growth & development : Plant Stems.
- physiology : Plant Leaves, Plant Roots, Populus.
- Ecosystem, Floods, Genotype, Hybridization, Genetic.
Abstract
Cottonwoods, riparian poplars, are dioecious and prior studies have indicated that female poplars and willows can be more abundant than males in low-elevation zones, which are occasionally flooded. We investigated the response to flooding of clonal saplings of 12 male and 9 female narrowleaf cottonwoods (Populus angustifolia) grown for 15 weeks in a greenhouse, along with three females of a co-occurring native hybrid (Populus × jackii = Populus deltoides × Populus balsamifera). Three water-level treatments were provided, with substrate inundation as the flood treatment. In the non-flooded condition, the hybrids produced about four-fold more dry weight (DW) than the narrowleaf cottonwoods (P < 0.01). In both cottonwood taxa, flooding reduced stem height and DW, root and leaf area and weight, leaf chlorophyll and stomatal conductance (all P < 0.01). Inundation increased the foliar carbon-to-nitrogen ratio (+11%; P < 0.05) but did not significantly alter leaf water potential (mean -1.5 MPa), or foliar δ(13)C, which was lower in P. angustifolia (-32.8‰) than P. × jackii (-31.5‰; P < 0.05). Water level influenced the root distribution as roots were sparse in the saturated substrate and abundant in the capillary fringe above. The male and female P. angustifolia genotypes grew similarly with the favorable water levels, but the males tended to be more inhibited by flooding. Sapling DW of males was reduced by 56% compared with a 44% reduction for females (P = 0.1), and there were similar lower reductions for leaf, stem and root DW in females. These results demonstrate the inundation response of floodplain trees and suggest relative flood tolerance as: P. angustifolia female > P. angustifolia male > P. × jackii female. This indicates that narrowleaf cottonwoods are relatively flood tolerant and suggests that females are more flood tolerant than males. We propose the concept of 'strategic positioning', whereby the seed-producing females could be better adapted to naturally flooded, low-elevation streamside zones where seedling recruitment generally occurs.
DOI: 10.1093/treephys/tpq089
PubMed: 21081653
Affiliations:
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Pearce</name></author><author><name sortKey="Letts, Matthew G" sort="Letts, Matthew G" uniqKey="Letts M" first="Matthew G" last="Letts">Matthew G. Letts</name></author><author><name sortKey="Jiskoot, Hester" sort="Jiskoot, Hester" uniqKey="Jiskoot H" first="Hester" last="Jiskoot">Hester Jiskoot</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2010">2010</date><idno type="RBID">pubmed:21081653</idno><idno type="pmid">21081653</idno><idno type="doi">10.1093/treephys/tpq089</idno><idno type="wicri:Area/Main/Corpus">003011</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">003011</idno><idno type="wicri:Area/Main/Curation">003011</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">003011</idno><idno type="wicri:Area/Main/Exploration">003011</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Streamside trees: responses of male, female and hybrid cottonwoods to flooding.</title><author><name sortKey="Nielsen, Julie L" sort="Nielsen, Julie L" uniqKey="Nielsen J" first="Julie L" last="Nielsen">Julie L. 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Letts</name></author><author><name sortKey="Jiskoot, Hester" sort="Jiskoot, Hester" uniqKey="Jiskoot H" first="Hester" last="Jiskoot">Hester Jiskoot</name></author></analytic><series><title level="j">Tree physiology</title><idno type="ISSN">0829-318X</idno><imprint><date when="2010" type="published">2010</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Ecosystem (MeSH)</term><term>Floods (MeSH)</term><term>Genotype (MeSH)</term><term>Hybridization, Genetic (MeSH)</term><term>Plant Leaves (physiology)</term><term>Plant Roots (physiology)</term><term>Plant Stems (growth & development)</term><term>Populus (genetics)</term><term>Populus (physiology)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Feuilles de plante (physiologie)</term><term>Génotype (MeSH)</term><term>Hybridation génétique (MeSH)</term><term>Inondations (MeSH)</term><term>Populus (génétique)</term><term>Populus (physiologie)</term><term>Racines de plante (physiologie)</term><term>Tiges de plante (croissance et développement)</term><term>Écosystème (MeSH)</term></keywords><keywords scheme="MESH" qualifier="croissance et développement" xml:lang="fr"><term>Tiges 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 Stems</term></keywords><keywords scheme="MESH" qualifier="génétique" xml:lang="fr"><term>Populus</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Feuilles de plante</term><term>Populus</term><term>Racines de plante</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Plant Leaves</term><term>Plant Roots</term><term>Populus</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Ecosystem</term><term>Floods</term><term>Genotype</term><term>Hybridization, Genetic</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Génotype</term><term>Hybridation génétique</term><term>Inondations</term><term>Écosystème</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Cottonwoods, riparian poplars, are dioecious and prior studies have indicated that female poplars and willows can be more abundant than males in low-elevation zones, which are occasionally flooded. We investigated the response to flooding of clonal saplings of 12 male and 9 female narrowleaf cottonwoods (Populus angustifolia) grown for 15 weeks in a greenhouse, along with three females of a co-occurring native hybrid (Populus × jackii = Populus deltoides × Populus balsamifera). Three water-level treatments were provided, with substrate inundation as the flood treatment. In the non-flooded condition, the hybrids produced about four-fold more dry weight (DW) than the narrowleaf cottonwoods (P < 0.01). In both cottonwood taxa, flooding reduced stem height and DW, root and leaf area and weight, leaf chlorophyll and stomatal conductance (all P < 0.01). Inundation increased the foliar carbon-to-nitrogen ratio (+11%; P < 0.05) but did not significantly alter leaf water potential (mean -1.5 MPa), or foliar δ(13)C, which was lower in P. angustifolia (-32.8‰) than P. × jackii (-31.5‰; P < 0.05). Water level influenced the root distribution as roots were sparse in the saturated substrate and abundant in the capillary fringe above. The male and female P. angustifolia genotypes grew similarly with the favorable water levels, but the males tended to be more inhibited by flooding. Sapling DW of males was reduced by 56% compared with a 44% reduction for females (P = 0.1), and there were similar lower reductions for leaf, stem and root DW in females. These results demonstrate the inundation response of floodplain trees and suggest relative flood tolerance as: P. angustifolia female > P. angustifolia male > P. × jackii female. This indicates that narrowleaf cottonwoods are relatively flood tolerant and suggests that females are more flood tolerant than males. We propose the concept of 'strategic positioning', whereby the seed-producing females could be better adapted to naturally flooded, low-elevation streamside zones where seedling recruitment generally occurs.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">21081653</PMID><DateCompleted><Year>2011</Year><Month>03</Month><Day>08</Day></DateCompleted><DateRevised><Year>2010</Year><Month>11</Month><Day>29</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">0829-318X</ISSN><JournalIssue CitedMedium="Print"><Volume>30</Volume><Issue>12</Issue><PubDate><Year>2010</Year><Month>Dec</Month></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Streamside trees: responses of male, female and hybrid cottonwoods to flooding.</ArticleTitle><Pagination><MedlinePgn>1479-88</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1093/treephys/tpq089</ELocationID><Abstract><AbstractText>Cottonwoods, riparian poplars, are dioecious and prior studies have indicated that female poplars and willows can be more abundant than males in low-elevation zones, which are occasionally flooded. We investigated the response to flooding of clonal saplings of 12 male and 9 female narrowleaf cottonwoods (Populus angustifolia) grown for 15 weeks in a greenhouse, along with three females of a co-occurring native hybrid (Populus × jackii = Populus deltoides × Populus balsamifera). Three water-level treatments were provided, with substrate inundation as the flood treatment. In the non-flooded condition, the hybrids produced about four-fold more dry weight (DW) than the narrowleaf cottonwoods (P < 0.01). In both cottonwood taxa, flooding reduced stem height and DW, root and leaf area and weight, leaf chlorophyll and stomatal conductance (all P < 0.01). Inundation increased the foliar carbon-to-nitrogen ratio (+11%; P < 0.05) but did not significantly alter leaf water potential (mean -1.5 MPa), or foliar δ(13)C, which was lower in P. angustifolia (-32.8‰) than P. × jackii (-31.5‰; P < 0.05). Water level influenced the root distribution as roots were sparse in the saturated substrate and abundant in the capillary fringe above. The male and female P. angustifolia genotypes grew similarly with the favorable water levels, but the males tended to be more inhibited by flooding. Sapling DW of males was reduced by 56% compared with a 44% reduction for females (P = 0.1), and there were similar lower reductions for leaf, stem and root DW in females. These results demonstrate the inundation response of floodplain trees and suggest relative flood tolerance as: P. angustifolia female > P. angustifolia male > P. × jackii female. This indicates that narrowleaf cottonwoods are relatively flood tolerant and suggests that females are more flood tolerant than males. We propose the concept of 'strategic positioning', whereby the seed-producing females could be better adapted to naturally flooded, low-elevation streamside zones where seedling recruitment generally occurs.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Nielsen</LastName><ForeName>Julie L</ForeName><Initials>JL</Initials><AffiliationInfo><Affiliation>Department of Biological Sciences, University of Lethbridge, Alberta, Canada T1K 3M4.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Rood</LastName><ForeName>Stewart B</ForeName><Initials>SB</Initials></Author><Author ValidYN="Y"><LastName>Pearce</LastName><ForeName>David W</ForeName><Initials>DW</Initials></Author><Author ValidYN="Y"><LastName>Letts</LastName><ForeName>Matthew G</ForeName><Initials>MG</Initials></Author><Author ValidYN="Y"><LastName>Jiskoot</LastName><ForeName>Hester</ForeName><Initials>H</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2010</Year><Month>11</Month><Day>16</Day></ArticleDate></Article><MedlineJournalInfo><Country>Canada</Country><MedlineTA>Tree Physiol</MedlineTA><NlmUniqueID>100955338</NlmUniqueID><ISSNLinking>0829-318X</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D017753" MajorTopicYN="N">Ecosystem</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D055868" MajorTopicYN="N">Floods</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D005838" MajorTopicYN="N">Genotype</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D006824" MajorTopicYN="N">Hybridization, Genetic</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018517" MajorTopicYN="N">Plant Roots</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018547" MajorTopicYN="N">Plant Stems</DescriptorName><QualifierName UI="Q000254" MajorTopicYN="N">growth & development</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000235" MajorTopicYN="Y">genetics</QualifierName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2010</Year><Month>11</Month><Day>18</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2010</Year><Month>11</Month><Day>18</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2011</Year><Month>3</Month><Day>9</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">21081653</ArticleId><ArticleId IdType="pii">tpq089</ArticleId><ArticleId IdType="doi">10.1093/treephys/tpq089</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Canada</li></country></list><tree><noCountry><name sortKey="Jiskoot, Hester" sort="Jiskoot, Hester" uniqKey="Jiskoot H" first="Hester" last="Jiskoot">Hester Jiskoot</name><name sortKey="Letts, Matthew G" sort="Letts, Matthew G" uniqKey="Letts M" first="Matthew G" last="Letts">Matthew G. Letts</name><name sortKey="Pearce, David W" sort="Pearce, David W" uniqKey="Pearce D" first="David W" last="Pearce">David W. Pearce</name><name sortKey="Rood, Stewart B" sort="Rood, Stewart B" uniqKey="Rood S" first="Stewart B" last="Rood">Stewart B. Rood</name></noCountry><country name="Canada"><noRegion><name sortKey="Nielsen, Julie L" sort="Nielsen, Julie L" uniqKey="Nielsen J" first="Julie L" last="Nielsen">Julie L. Nielsen</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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