PoplarV1, Main, Exploration, bibRecord, 003300

Dynamics of the volatile defense of winter "dormant" balsam poplar (Populus balsamifera).

Identifieur interne : 003300 ( Main/Exploration ); précédent : 003299; suivant : 003301

Dynamics of the volatile defense of winter "dormant" balsam poplar (Populus balsamifera).

Auteurs : Thomas P. Clausen [États-Unis] ; Janice Chen ; John P. Bryant ; Frederick D. Provenza ; Juan Villalba

Source :

Journal of chemical ecology [ 1573-1561 ] ; 2010.

RBID : pubmed:20411311

Descripteurs français

KwdFr :
- Animaux (MeSH), Cyclohexanones (composition chimique), Cyclohexanones (toxicité), Hétérosides (composition chimique), Hétérosides (toxicité), Lepus (MeSH), Populus (physiologie), Saisons (MeSH), Volatilisation (MeSH).
MESH :
- composition chimique : Cyclohexanones, Hétérosides.
- physiologie : Populus.
- toxicité : Cyclohexanones, Hétérosides.
- Animaux, Lepus, Saisons, Volatilisation.

English descriptors

KwdEn :
- Animals (MeSH), Cyclohexanones (chemistry), Cyclohexanones (toxicity), Glycosides (chemistry), Glycosides (toxicity), Hares (MeSH), Populus (physiology), Seasons (MeSH), Volatilization (MeSH).
MESH :
- chemical , chemistry : Cyclohexanones, Glycosides.
- chemical , toxicity : Cyclohexanones, Glycosides.
- physiology : Populus.
- Animals, Hares, Seasons, Volatilization.

Abstract

6-Hydroxycylohex-2-en-1-one (6-HCH) has been reported as a major chemical defense of the winter-dormant internodes of balsam poplar (Populus balsamifera) against feeding by herbivores such as the snowshoe hare (Lepus americanus). We report that the concentration of 6-HCH in the fall internodes is triggered by a single hard frost, and then undergoes an exponential decline through volatilization over the winter that results in barely detectable quantities by early spring. We conclude that the role of 6-HCH in the defense of mature balsam poplar is more complex than simply acting as a toxin. Rather, 6-HCH's role as a defensive agent must evolve over the course of the winter from being a co-toxin to a cue for a conditioned flavor aversion (CFA) to finally having no role by late spring.

DOI: 10.1007/s10886-010-9788-0
PubMed: 20411311

Affiliations:

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Le document en format XML

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<term>Glycosides (toxicity)</term>
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<term>Populus (physiology)</term>
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<term>Volatilization (MeSH)</term>
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<keywords scheme="KwdFr" xml:lang="fr"><term>Animaux (MeSH)</term>
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<term>Hétérosides (composition chimique)</term>
<term>Hétérosides (toxicité)</term>
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<front><div type="abstract" xml:lang="en">6-Hydroxycylohex-2-en-1-one (6-HCH) has been reported as a major chemical defense of the winter-dormant internodes of balsam poplar (Populus balsamifera) against feeding by herbivores such as the snowshoe hare (Lepus americanus). We report that the concentration of 6-HCH in the fall internodes is triggered by a single hard frost, and then undergoes an exponential decline through volatilization over the winter that results in barely detectable quantities by early spring. We conclude that the role of 6-HCH in the defense of mature balsam poplar is more complex than simply acting as a toxin. Rather, 6-HCH's role as a defensive agent must evolve over the course of the winter from being a co-toxin to a cue for a conditioned flavor aversion (CFA) to finally having no role by late spring.</div>
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Dynamics of the volatile defense of winter "dormant" balsam poplar (Populus balsamifera).

Dynamics of the volatile defense of winter "dormant" balsam poplar (Populus balsamifera).

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

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