Competition- and resource-mediated tradeoffs between growth and defensive chemistry in trembling aspen (Populus tremuloides).
Identifieur interne : 003E41 ( Main/Exploration ); précédent : 003E40; suivant : 003E42Competition- and resource-mediated tradeoffs between growth and defensive chemistry in trembling aspen (Populus tremuloides).
Auteurs : Jack R. Donaldson [États-Unis] ; Eric L. Kruger ; Richard L. LindrothSource :
- The New phytologist [ 0028-646X ] ; 2006.
Descripteurs français
- KwdFr :
- Azote (métabolisme), Biomasse (MeSH), Feuilles de plante (croissance et développement), Feuilles de plante (physiologie), Génotype (MeSH), Photosynthèse (MeSH), Populus (composition chimique), Populus (croissance et développement), Populus (métabolisme), Pousses de plante (croissance et développement), Pousses de plante (physiologie), Proanthocyanidines (métabolisme), Racines de plante (croissance et développement), Racines de plante (physiologie).
- MESH :
- composition chimique : Populus.
- croissance et développement : Feuilles de plante, Populus, Pousses de plante, Racines de plante.
- métabolisme : Azote, Populus, Proanthocyanidines.
- physiologie : Feuilles de plante, Pousses de plante, Racines de plante.
- Biomasse, Génotype, Photosynthèse.
English descriptors
- KwdEn :
- Biomass (MeSH), Genotype (MeSH), Nitrogen (metabolism), Photosynthesis (MeSH), Plant Leaves (growth & development), Plant Leaves (physiology), Plant Roots (growth & development), Plant Roots (physiology), Plant Shoots (growth & development), Plant Shoots (physiology), Populus (chemistry), Populus (growth & development), Populus (metabolism), Proanthocyanidins (metabolism).
- MESH :
- chemical , metabolism : Nitrogen, Proanthocyanidins.
- chemistry : Populus.
- growth & development : Plant Leaves, Plant Roots, Plant Shoots, Populus.
- metabolism : Populus.
- physiology : Plant Leaves, Plant Roots, Plant Shoots.
- Biomass, Genotype, Photosynthesis.
Abstract
Costs of defense are thought to maintain genetic variations in the expression of defense within plant populations. As with many plant species, aspen exhibits considerable variation in allocation to secondary metabolites. This study examined the independent and interactive effects of genotype, soil fertility and belowground competition on defensive chemistry and growth in trembling aspen (Populus tremuloides). Four aspen genotypes were grown with high and low soil fertility, and with and without root competition. Physiological, morphological and allocational determinants of growth were measured to identify growth-defense tradeoffs. Nutrient limitation and competition decreased growth, leaf mass ratio, leaf nitrogen concentration and photosynthesis, and increased root : shoot ratio and leaf condensed tannin concentrations. The competition treatment also resulted in increased leaf phenolic glycoside (PG) concentrations. Aspen growth was negatively correlated with PG concentrations under low fertility with competition. The relationship between growth and its major determinants was also negatively related to foliar condensed tannins expressed as a proportion of tree mass, indicating an additional indirect cost of allocation to secondary metabolites.
DOI: 10.1111/j.1469-8137.2005.01613.x
PubMed: 16411958
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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As with many plant species, aspen exhibits considerable variation in allocation to secondary metabolites. This study examined the independent and interactive effects of genotype, soil fertility and belowground competition on defensive chemistry and growth in trembling aspen (Populus tremuloides). Four aspen genotypes were grown with high and low soil fertility, and with and without root competition. Physiological, morphological and allocational determinants of growth were measured to identify growth-defense tradeoffs. Nutrient limitation and competition decreased growth, leaf mass ratio, leaf nitrogen concentration and photosynthesis, and increased root : shoot ratio and leaf condensed tannin concentrations. The competition treatment also resulted in increased leaf phenolic glycoside (PG) concentrations. Aspen growth was negatively correlated with PG concentrations under low fertility with competition. The relationship between growth and its major determinants was also negatively related to foliar condensed tannins expressed as a proportion of tree mass, indicating an additional indirect cost of allocation to secondary metabolites.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">16411958</PMID><DateCompleted><Year>2006</Year><Month>03</Month><Day>27</Day></DateCompleted><DateRevised><Year>2020</Year><Month>09</Month><Day>30</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0028-646X</ISSN><JournalIssue CitedMedium="Print"><Volume>169</Volume><Issue>3</Issue><PubDate><Year>2006</Year></PubDate></JournalIssue><Title>The New phytologist</Title><ISOAbbreviation>New Phytol</ISOAbbreviation></Journal><ArticleTitle>Competition- and resource-mediated tradeoffs between growth and defensive chemistry in trembling aspen (Populus tremuloides).</ArticleTitle><Pagination><MedlinePgn>561-70</MedlinePgn></Pagination><Abstract><AbstractText>Costs of defense are thought to maintain genetic variations in the expression of defense within plant populations. As with many plant species, aspen exhibits considerable variation in allocation to secondary metabolites. This study examined the independent and interactive effects of genotype, soil fertility and belowground competition on defensive chemistry and growth in trembling aspen (Populus tremuloides). Four aspen genotypes were grown with high and low soil fertility, and with and without root competition. Physiological, morphological and allocational determinants of growth were measured to identify growth-defense tradeoffs. Nutrient limitation and competition decreased growth, leaf mass ratio, leaf nitrogen concentration and photosynthesis, and increased root : shoot ratio and leaf condensed tannin concentrations. The competition treatment also resulted in increased leaf phenolic glycoside (PG) concentrations. Aspen growth was negatively correlated with PG concentrations under low fertility with competition. 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Kruger</name><name sortKey="Lindroth, Richard L" sort="Lindroth, Richard L" uniqKey="Lindroth R" first="Richard L" last="Lindroth">Richard L. Lindroth</name></noCountry><country name="États-Unis"><noRegion><name sortKey="Donaldson, Jack R" sort="Donaldson, Jack R" uniqKey="Donaldson J" first="Jack R" last="Donaldson">Jack R. Donaldson</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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