Onset of Sheath Extension and Duration of Lamina Extension are Major Determinants of the Response of Maize Lamina Length to Plant Density
Identifieur interne : 002287 ( Istex/Curation ); précédent : 002286; suivant : 002288Onset of Sheath Extension and Duration of Lamina Extension are Major Determinants of the Response of Maize Lamina Length to Plant Density
Auteurs : Bruno Andrieu [France] ; Jonathan Hillier [France] ; Colin Birch [Australie]Source :
- Annals of Botany [ 0305-7364 ] ; 2006-08-22.
Abstract
• Background and Aims Plants regulate their architecture strongly in response to density, and there is evidence that this involves changes in the duration of leaf extension. This questions the approximation, central in crop models, that development follows a fixed thermal time schedule. The aim of this research is to investigate, using maize as a model, how the kinetics of extension of grass leaves change with density, and to propose directions for inclusion of this regulation in plant models. • Methods Periodic dissection of plants allowed the establishment of the kinetics of lamina and sheath extension for two contrasting sowing densities. The temperature of the growing zone was measured with thermocouples. Two-phase (exponential plus linear) models were fitted to the data, allowing analysis of the timing of the phase changes of extension, and the extension rate of sheaths and blades during both phases. • Key Results The duration of lamina extension dictated the variation in lamina length between treatments. The lower phytomers were longer at high density, with delayed onset of sheath extension allowing more time for the lamina to extend. In the upper phytomers—which were shorter at high density—the laminae had a lower relative extension rate (RER) in the exponential phase and delayed onset of linear extension, and less time available for extension since early sheath extension was not delayed. • Conclusions The relative timing of the onset of fast extension of the lamina with that of sheath development is the main determinant of the response of lamina length to density. Evidence is presented that the contrasting behaviour of lower and upper phytomers is related to differing regulation of sheath ontogeny before and after panicle initiation. A conceptual model is proposed to explain how the observed asynchrony between lamina and sheath development is regulated.
Url:
DOI: 10.1093/aob/mcl177
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: Pour aller vers cette notice dans l'étape Curation :002287
Links to Exploration step
ISTEX:BAAE35FB824F5AF288CB0AC51060EE50EB716008Curation
No country items
Bruno Andrieu<affiliation><mods:affiliation></mods:affiliation><wicri:noCountry code="syntax">???</wicri:noCountry></affiliation><affiliation wicri:level="1"><mods:affiliation>E-mail: Bruno.Andrieu@grignon.inra.fr</mods:affiliation><country wicri:rule="url">France</country></affiliation>Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title>Onset of Sheath Extension and Duration of Lamina Extension are Major Determinants of the Response of Maize Lamina Length to Plant Density</title><author><name sortKey="Andrieu, Bruno" sort="Andrieu, Bruno" uniqKey="Andrieu B" first="Bruno" last="Andrieu">Bruno Andrieu</name><affiliation wicri:level="1"><mods:affiliation>Institut National de la Recherche Agronomique, Unité Environnement et Grandes Cultures 78850 Thiverval-Grignon, France</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Institut National de la Recherche Agronomique, Unité Environnement et Grandes Cultures 78850 Thiverval-Grignon</wicri:regionArea></affiliation><affiliation wicri:level="1"><mods:affiliation>E-mail: Bruno.Andrieu@grignon.inra.fr</mods:affiliation><country wicri:rule="url">France</country></affiliation><affiliation><mods:affiliation></mods:affiliation><wicri:noCountry code="syntax">???</wicri:noCountry></affiliation><affiliation wicri:level="1"><mods:affiliation>E-mail: Bruno.Andrieu@grignon.inra.fr</mods:affiliation><country wicri:rule="url">France</country></affiliation></author><author><name sortKey="Hillier, Jonathan" sort="Hillier, Jonathan" uniqKey="Hillier J" first="Jonathan" last="Hillier">Jonathan Hillier</name><affiliation wicri:level="1"><mods:affiliation>Institut National de la Recherche Agronomique, Unité Environnement et Grandes Cultures 78850 Thiverval-Grignon, France</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Institut National de la Recherche Agronomique, Unité Environnement et Grandes Cultures 78850 Thiverval-Grignon</wicri:regionArea></affiliation></author><author><name sortKey="Birch, Colin" sort="Birch, Colin" uniqKey="Birch C" first="Colin" last="Birch">Colin Birch</name><affiliation wicri:level="1"><mods:affiliation>The University of Queensland Gatton, 4343 Qld, Australia</mods:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>The University of Queensland Gatton, 4343 Qld</wicri:regionArea></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:BAAE35FB824F5AF288CB0AC51060EE50EB716008</idno><date when="2006" year="2006">2006</date><idno type="doi">10.1093/aob/mcl177</idno><idno type="url">https://api.istex.fr/document/BAAE35FB824F5AF288CB0AC51060EE50EB716008/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">002287</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">002287</idno><idno type="wicri:Area/Istex/Curation">002287</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a">Onset of Sheath Extension and Duration of Lamina Extension are Major Determinants of the Response of Maize Lamina Length to Plant Density</title><author><name sortKey="Andrieu, Bruno" sort="Andrieu, Bruno" uniqKey="Andrieu B" first="Bruno" last="Andrieu">Bruno Andrieu</name><affiliation wicri:level="1"><mods:affiliation>Institut National de la Recherche Agronomique, Unité Environnement et Grandes Cultures 78850 Thiverval-Grignon, France</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Institut National de la Recherche Agronomique, Unité Environnement et Grandes Cultures 78850 Thiverval-Grignon</wicri:regionArea></affiliation><affiliation wicri:level="1"><mods:affiliation>E-mail: Bruno.Andrieu@grignon.inra.fr</mods:affiliation><country wicri:rule="url">France</country></affiliation><affiliation><mods:affiliation></mods:affiliation><wicri:noCountry code="syntax">???</wicri:noCountry></affiliation><affiliation wicri:level="1"><mods:affiliation>E-mail: Bruno.Andrieu@grignon.inra.fr</mods:affiliation><country wicri:rule="url">France</country></affiliation></author><author><name sortKey="Hillier, Jonathan" sort="Hillier, Jonathan" uniqKey="Hillier J" first="Jonathan" last="Hillier">Jonathan Hillier</name><affiliation wicri:level="1"><mods:affiliation>Institut National de la Recherche Agronomique, Unité Environnement et Grandes Cultures 78850 Thiverval-Grignon, France</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Institut National de la Recherche Agronomique, Unité Environnement et Grandes Cultures 78850 Thiverval-Grignon</wicri:regionArea></affiliation></author><author><name sortKey="Birch, Colin" sort="Birch, Colin" uniqKey="Birch C" first="Colin" last="Birch">Colin Birch</name><affiliation wicri:level="1"><mods:affiliation>The University of Queensland Gatton, 4343 Qld, Australia</mods:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>The University of Queensland Gatton, 4343 Qld</wicri:regionArea></affiliation></author></analytic><monogr></monogr><series><title level="j">Annals of Botany</title><idno type="ISSN">0305-7364</idno><idno type="eISSN">1095-8290</idno><imprint><publisher>Oxford University Press</publisher><date type="published" when="2006-08-22">2006-08-22</date><biblScope unit="volume">98</biblScope><biblScope unit="issue">5</biblScope><biblScope unit="page" from="1005">1005</biblScope><biblScope unit="page" to="1016">1016</biblScope></imprint><idno type="ISSN">0305-7364</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0305-7364</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract">• Background and Aims Plants regulate their architecture strongly in response to density, and there is evidence that this involves changes in the duration of leaf extension. This questions the approximation, central in crop models, that development follows a fixed thermal time schedule. The aim of this research is to investigate, using maize as a model, how the kinetics of extension of grass leaves change with density, and to propose directions for inclusion of this regulation in plant models. • Methods Periodic dissection of plants allowed the establishment of the kinetics of lamina and sheath extension for two contrasting sowing densities. The temperature of the growing zone was measured with thermocouples. Two-phase (exponential plus linear) models were fitted to the data, allowing analysis of the timing of the phase changes of extension, and the extension rate of sheaths and blades during both phases. • Key Results The duration of lamina extension dictated the variation in lamina length between treatments. The lower phytomers were longer at high density, with delayed onset of sheath extension allowing more time for the lamina to extend. In the upper phytomers—which were shorter at high density—the laminae had a lower relative extension rate (RER) in the exponential phase and delayed onset of linear extension, and less time available for extension since early sheath extension was not delayed. • Conclusions The relative timing of the onset of fast extension of the lamina with that of sheath development is the main determinant of the response of lamina length to density. Evidence is presented that the contrasting behaviour of lower and upper phytomers is related to differing regulation of sheath ontogeny before and after panicle initiation. A conceptual model is proposed to explain how the observed asynchrony between lamina and sheath development is regulated.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Asie/explor/AustralieFrV1/Data/Istex/Curation
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 002287 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Istex/Curation/biblio.hfd -nk 002287 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Asie
|area= AustralieFrV1
|flux= Istex
|étape= Curation
|type= RBID
|clé= ISTEX:BAAE35FB824F5AF288CB0AC51060EE50EB716008
|texte= Onset of Sheath Extension and Duration of Lamina Extension are Major Determinants of the Response of Maize Lamina Length to Plant Density
}}
| This area was generated with Dilib version V0.6.33. |  |