PoplarV1, Main, Exploration, bibRecord, 000897

Identifying the relevant carbohydrate storage pools available for remobilization in aspen roots.

Identifieur interne : 000897 ( Main/Exploration ); précédent : 000896; suivant : 000898

Identifying the relevant carbohydrate storage pools available for remobilization in aspen roots.

Auteurs : Erin Wiley [Canada] ; Carolyn M. King [Canada] ; Simon M. Landh Usser [Canada]

Source :

Tree physiology [ 1758-4469 ] ; 2019.

RBID : pubmed:31094427

Descripteurs français

KwdFr :
- Arbres (MeSH), Carbone (MeSH), Glucides (MeSH), Métabolisme glucidique (MeSH), Racines de plante (MeSH), Xylème (MeSH).
MESH :
- Arbres, Carbone, Glucides, Métabolisme glucidique, Racines de plante, Xylème.

English descriptors

KwdEn :
- Carbohydrate Metabolism (MeSH), Carbohydrates (MeSH), Carbon (MeSH), Plant Roots (MeSH), Trees (MeSH), Xylem (MeSH).
MESH :
- chemical : Carbohydrates, Carbon.
- Carbohydrate Metabolism, Plant Roots, Trees, Xylem.

Abstract

Nonstructural carbohydrate (NSC) remobilization remains poorly understood in trees. In particular, it remains unclear (i) which tissues (e.g., living bark or xylem) and compounds (sugars or starch) in woody plants are the main sources of remobilized carbon, (ii) to what extent these NSC pools can be depleted and (iii) whether initial NSC mass or concentration is a better predictor of regrowth potential following disturbance. To address these questions, we collected root segments from a large mature trembling aspen stand; we then allowed them to resprout (sucker) in the dark and remobilize NSC until all sprouts had died. We found that initial starch mass, not concentration, was the best predictor of subsequent sprout mass. In total, more NSC mass (~4×) was remobilized from the living inner bark than the xylem of the roots. After resprouting, root starch was generally depleted to <0.6% w/w in both tissues. In contrast, a large portion of sugars appear unavailable for remobilization: sugar concentrations were only reduced to 12% w/w in the bark and 2% in the xylem. These findings suggest that in order to test whether plant processes like resprouting are limited by storage we need to (i) measure storage in the living bark, not just the xylem, (ii) consider storage pool size-not just concentration-and (iii) carefully determine which compounds are actually components of the storage pool.

DOI: 10.1093/treephys/tpz051
PubMed: 31094427

Affiliations:

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Le document en format XML

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<author><name sortKey="Wiley, Erin" sort="Wiley, Erin" uniqKey="Wiley E" first="Erin" last="Wiley">Erin Wiley</name>
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<term>Plant Roots (MeSH)</term>
<term>Trees (MeSH)</term>
<term>Xylem (MeSH)</term>
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<term>Carbone (MeSH)</term>
<term>Glucides (MeSH)</term>
<term>Métabolisme glucidique (MeSH)</term>
<term>Racines de plante (MeSH)</term>
<term>Xylème (MeSH)</term>
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<term>Carbon</term>
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<term>Xylem</term>
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<front><div type="abstract" xml:lang="en">Nonstructural carbohydrate (NSC) remobilization remains poorly understood in trees. In particular, it remains unclear (i) which tissues (e.g., living bark or xylem) and compounds (sugars or starch) in woody plants are the main sources of remobilized carbon, (ii) to what extent these NSC pools can be depleted and (iii) whether initial NSC mass or concentration is a better predictor of regrowth potential following disturbance. To address these questions, we collected root segments from a large mature trembling aspen stand; we then allowed them to resprout (sucker) in the dark and remobilize NSC until all sprouts had died. We found that initial starch mass, not concentration, was the best predictor of subsequent sprout mass. In total, more NSC mass (~4×) was remobilized from the living inner bark than the xylem of the roots. After resprouting, root starch was generally depleted to <0.6% w/w in both tissues. In contrast, a large portion of sugars appear unavailable for remobilization: sugar concentrations were only reduced to 12% w/w in the bark and 2% in the xylem. These findings suggest that in order to test whether plant processes like resprouting are limited by storage we need to (i) measure storage in the living bark, not just the xylem, (ii) consider storage pool size-not just concentration-and (iii) carefully determine which compounds are actually components of the storage pool.</div>
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<Issue>7</Issue>
<PubDate><Year>2019</Year>
<Month>07</Month>
<Day>18</Day>
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<Title>Tree physiology</Title>
<ISOAbbreviation>Tree Physiol</ISOAbbreviation>
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<ArticleTitle>Identifying the relevant carbohydrate storage pools available for remobilization in aspen roots.</ArticleTitle>
<Pagination><MedlinePgn>1109-1120</MedlinePgn>
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<Abstract><AbstractText>Nonstructural carbohydrate (NSC) remobilization remains poorly understood in trees. In particular, it remains unclear (i) which tissues (e.g., living bark or xylem) and compounds (sugars or starch) in woody plants are the main sources of remobilized carbon, (ii) to what extent these NSC pools can be depleted and (iii) whether initial NSC mass or concentration is a better predictor of regrowth potential following disturbance. To address these questions, we collected root segments from a large mature trembling aspen stand; we then allowed them to resprout (sucker) in the dark and remobilize NSC until all sprouts had died. We found that initial starch mass, not concentration, was the best predictor of subsequent sprout mass. In total, more NSC mass (~4×) was remobilized from the living inner bark than the xylem of the roots. After resprouting, root starch was generally depleted to <0.6% w/w in both tissues. In contrast, a large portion of sugars appear unavailable for remobilization: sugar concentrations were only reduced to 12% w/w in the bark and 2% in the xylem. These findings suggest that in order to test whether plant processes like resprouting are limited by storage we need to (i) measure storage in the living bark, not just the xylem, (ii) consider storage pool size-not just concentration-and (iii) carefully determine which compounds are actually components of the storage pool.</AbstractText>
<CopyrightInformation>© The Author(s) 2019. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.</CopyrightInformation>
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Identifying the relevant carbohydrate storage pools available for remobilization in aspen roots.

Identifying the relevant carbohydrate storage pools available for remobilization in aspen roots.

Source :

Descripteurs français

English descriptors

Abstract

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

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki