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Dynamics of heterorhizic root systems: protoxylem groups within the fine-root system of Chamaecyparis obtusa.

Identifieur interne : 003514 ( Main/Curation ); précédent : 003513; suivant : 003515

Dynamics of heterorhizic root systems: protoxylem groups within the fine-root system of Chamaecyparis obtusa.

Auteurs : Takuo Hishi [Japon] ; Hiroshi Takeda

Source :

The New phytologist [ 0028-646X ] ; 2005.

RBID : pubmed:15998402

Descripteurs français

KwdFr :
- Azote (métabolisme), Carbone (métabolisme), Chamaecyparis (croissance et développement), Chamaecyparis (microbiologie), Chamaecyparis (métabolisme), Japon (MeSH), Mycorhizes (métabolisme), Racines de plante (croissance et développement), Racines de plante (microbiologie), Racines de plante (métabolisme), Saisons (MeSH), Sol (analyse).
MESH :
- analyse : Sol.
- croissance et développement : Chamaecyparis, Racines de plante.
- microbiologie : Chamaecyparis, Racines de plante.
- métabolisme : Azote, Carbone, Chamaecyparis, Mycorhizes, Racines de plante.
- Japon, Saisons.

English descriptors

KwdEn :
- Carbon (metabolism), Chamaecyparis (growth & development), Chamaecyparis (metabolism), Chamaecyparis (microbiology), Japan (MeSH), Mycorrhizae (metabolism), Nitrogen (metabolism), Plant Roots (growth & development), Plant Roots (metabolism), Plant Roots (microbiology), Seasons (MeSH), Soil (analysis).
MESH :
- chemical , analysis : Soil.
- chemical , metabolism : Carbon, Nitrogen.
- growth & development : Chamaecyparis, Plant Roots.
- metabolism : Chamaecyparis, Mycorrhizae, Plant Roots.
- microbiology : Chamaecyparis, Plant Roots.
- Japan, Seasons.

Abstract

To understand the physiology of fine-root functions in relation to soil organic sources, the heterogeneity of individual root functions within a fine-root system requires investigation. Here the heterogeneous dynamics within fine-root systems are reported. The fine roots of Chamaecyparis obtusa were sampled using a sequential ingrowth core method over 2 yr. After color categorization, roots were classified into protoxylem groups from anatomical observations. The root lengths with diarch and triarch groups fluctuated seasonally, whereas the tetrarch root length increased. The percentage of secondary root mortality to total mortality increased with increasing amounts of protoxylem. The carbon : nitrogen ratio indicated that the decomposability of primary roots might be greater than that of secondary roots. The position of diarch roots was mostly apical, whereas tetrarch roots tended to be distributed in basal positions within the root architecture. We demonstrate the heterogeneous dynamics within a fine-root system of C. obtusa. Fine-root heterogeneity should affect soil C dynamics. This heterogeneity is determined by the branching position within the root architecture.

DOI: 10.1111/j.1469-8137.2005.01418.x
PubMed: 15998402

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pubmed:15998402

Le document en format XML

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<author><name sortKey="Hishi, Takuo" sort="Hishi, Takuo" uniqKey="Hishi T" first="Takuo" last="Hishi">Takuo Hishi</name>
<affiliation wicri:level="1"><nlm:affiliation>Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan. tak@kais.kyoto-u.ac.jp</nlm:affiliation>
<country xml:lang="fr">Japon</country>
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<author><name sortKey="Takeda, Hiroshi" sort="Takeda, Hiroshi" uniqKey="Takeda H" first="Hiroshi" last="Takeda">Hiroshi Takeda</name>
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<author><name sortKey="Hishi, Takuo" sort="Hishi, Takuo" uniqKey="Hishi T" first="Takuo" last="Hishi">Takuo Hishi</name>
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<term>Chamaecyparis (growth & development)</term>
<term>Chamaecyparis (metabolism)</term>
<term>Chamaecyparis (microbiology)</term>
<term>Japan (MeSH)</term>
<term>Mycorrhizae (metabolism)</term>
<term>Nitrogen (metabolism)</term>
<term>Plant Roots (growth & development)</term>
<term>Plant Roots (metabolism)</term>
<term>Plant Roots (microbiology)</term>
<term>Seasons (MeSH)</term>
<term>Soil (analysis)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr"><term>Azote (métabolisme)</term>
<term>Carbone (métabolisme)</term>
<term>Chamaecyparis (croissance et développement)</term>
<term>Chamaecyparis (microbiologie)</term>
<term>Chamaecyparis (métabolisme)</term>
<term>Japon (MeSH)</term>
<term>Mycorhizes (métabolisme)</term>
<term>Racines de plante (croissance et développement)</term>
<term>Racines de plante (microbiologie)</term>
<term>Racines de plante (métabolisme)</term>
<term>Saisons (MeSH)</term>
<term>Sol (analyse)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Soil</term>
</keywords>
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<term>Nitrogen</term>
</keywords>
<keywords scheme="MESH" qualifier="analyse" xml:lang="fr"><term>Sol</term>
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<term>Racines de plante</term>
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<term>Plant Roots</term>
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<term>Mycorrhizae</term>
<term>Plant Roots</term>
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<keywords scheme="MESH" qualifier="microbiologie" xml:lang="fr"><term>Chamaecyparis</term>
<term>Racines de plante</term>
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<front><div type="abstract" xml:lang="en">To understand the physiology of fine-root functions in relation to soil organic sources, the heterogeneity of individual root functions within a fine-root system requires investigation. Here the heterogeneous dynamics within fine-root systems are reported. The fine roots of Chamaecyparis obtusa were sampled using a sequential ingrowth core method over 2 yr. After color categorization, roots were classified into protoxylem groups from anatomical observations. The root lengths with diarch and triarch groups fluctuated seasonally, whereas the tetrarch root length increased. The percentage of secondary root mortality to total mortality increased with increasing amounts of protoxylem. The carbon : nitrogen ratio indicated that the decomposability of primary roots might be greater than that of secondary roots. The position of diarch roots was mostly apical, whereas tetrarch roots tended to be distributed in basal positions within the root architecture. We demonstrate the heterogeneous dynamics within a fine-root system of C. obtusa. Fine-root heterogeneity should affect soil C dynamics. This heterogeneity is determined by the branching position within the root architecture.</div>
</front>
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<DateCompleted><Year>2005</Year>
<Month>09</Month>
<Day>29</Day>
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<DateRevised><Year>2020</Year>
<Month>09</Month>
<Day>30</Day>
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<Abstract><AbstractText>To understand the physiology of fine-root functions in relation to soil organic sources, the heterogeneity of individual root functions within a fine-root system requires investigation. Here the heterogeneous dynamics within fine-root systems are reported. The fine roots of Chamaecyparis obtusa were sampled using a sequential ingrowth core method over 2 yr. After color categorization, roots were classified into protoxylem groups from anatomical observations. The root lengths with diarch and triarch groups fluctuated seasonally, whereas the tetrarch root length increased. The percentage of secondary root mortality to total mortality increased with increasing amounts of protoxylem. The carbon : nitrogen ratio indicated that the decomposability of primary roots might be greater than that of secondary roots. The position of diarch roots was mostly apical, whereas tetrarch roots tended to be distributed in basal positions within the root architecture. We demonstrate the heterogeneous dynamics within a fine-root system of C. obtusa. Fine-root heterogeneity should affect soil C dynamics. This heterogeneity is determined by the branching position within the root architecture.</AbstractText>
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Dynamics of heterorhizic root systems: protoxylem groups within the fine-root system of Chamaecyparis obtusa.

Dynamics of heterorhizic root systems: protoxylem groups within the fine-root system of Chamaecyparis obtusa.

Source :

Descripteurs français

English descriptors

Abstract

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

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

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Pour générer des pages wiki