The contribution of the awns of bread wheat (Triticum aestivum L.) to grain filling: Responses to water deficit and the effects of awns on ear temperature and hydraulic conductance

Autores
Maydup, Maria Luján; Antonietta, Mariana; Graciano, Corina; Guiamet, Juan José; Tambussi, Eduardo Alberto
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The awns of the ear have been reported as important sources of assimilates in wheat. However, their actual importance in grain filling is not well known. We examined several aspects of the awns and their role in the grain filling, and the objectives of this work were: (i) to study their photosynthetic activity during grain filling, comparing flag leaf, ear body and awns in two cultivars differing in ear contribution to grain filling, (ii) to estimate the influence of awns on the temperature and the hydraulic conductance of the ear, (iii) to analyze the response of the flag leaf versus awns to water deficit, particularly regarding relative water content and photosynthetic activity, (iv) to analyze if there is a correlation between awn size versus ear and awn contribution to the grain filling in six modern Argentinean cultivars, and, (v) to explore if awn size and awn contribution have changed during the past century, analyzing old and modern Argentinean cultivars. In this paper we show that: (1) during late grain filling, ear parts (particularly the body of the ear) maintained a higher photosynthetic activity than the flag leaf, (2) awns showed some ‘tolerance’ to water deficit, maintaining a higher relative water content and electron transport rate than the flag leaf under drought, (3) awns increase water conductance of the ear (particularly in the cv. K. Escudo), decrease the ear temperature during the morning, but increase ear temperature after midday (4) there is a moderately positive relationship between awn size and contribution of the ear to grain filling, and (5) in the retrospective analysis we did not find a clear tendency in awn size and awn contribution to grain filling along the years. However, in general terms modern cultivars seem to have a higher awn contribution (and higher awns size) than old ones. In summary, awns may have positive (increased photosynthetic area and activity, tolerance to drought) and negative (increased ear temperature) effects on grain filling, and their final impact on yield will depend on the interaction between these effects and prevailing environmental conditions.
Fil: Maydup, Maria Luján. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina
Fil: Antonietta, Mariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina
Fil: Graciano, Corina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina
Fil: Guiamet, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina
Fil: Tambussi, Eduardo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina
Materia
Awns
Ear Photosynthesis
Grain Filling
Triticum Aestivum
Wheat
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/34001
Acceder
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spelling The contribution of the awns of bread wheat (Triticum aestivum L.) to grain filling: Responses to water deficit and the effects of awns on ear temperature and hydraulic conductanceMaydup, Maria LujánAntonietta, MarianaGraciano, CorinaGuiamet, Juan JoséTambussi, Eduardo AlbertoAwnsEar PhotosynthesisGrain FillingTriticum AestivumWheathttps://purl.org/becyt/ford/4.1https://purl.org/becyt/ford/4The awns of the ear have been reported as important sources of assimilates in wheat. However, their actual importance in grain filling is not well known. We examined several aspects of the awns and their role in the grain filling, and the objectives of this work were: (i) to study their photosynthetic activity during grain filling, comparing flag leaf, ear body and awns in two cultivars differing in ear contribution to grain filling, (ii) to estimate the influence of awns on the temperature and the hydraulic conductance of the ear, (iii) to analyze the response of the flag leaf versus awns to water deficit, particularly regarding relative water content and photosynthetic activity, (iv) to analyze if there is a correlation between awn size versus ear and awn contribution to the grain filling in six modern Argentinean cultivars, and, (v) to explore if awn size and awn contribution have changed during the past century, analyzing old and modern Argentinean cultivars. In this paper we show that: (1) during late grain filling, ear parts (particularly the body of the ear) maintained a higher photosynthetic activity than the flag leaf, (2) awns showed some ‘tolerance’ to water deficit, maintaining a higher relative water content and electron transport rate than the flag leaf under drought, (3) awns increase water conductance of the ear (particularly in the cv. K. Escudo), decrease the ear temperature during the morning, but increase ear temperature after midday (4) there is a moderately positive relationship between awn size and contribution of the ear to grain filling, and (5) in the retrospective analysis we did not find a clear tendency in awn size and awn contribution to grain filling along the years. However, in general terms modern cultivars seem to have a higher awn contribution (and higher awns size) than old ones. In summary, awns may have positive (increased photosynthetic area and activity, tolerance to drought) and negative (increased ear temperature) effects on grain filling, and their final impact on yield will depend on the interaction between these effects and prevailing environmental conditions.Fil: Maydup, Maria Luján. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; ArgentinaFil: Antonietta, Mariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; ArgentinaFil: Graciano, Corina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; ArgentinaFil: Guiamet, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; ArgentinaFil: Tambussi, Eduardo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; ArgentinaElsevier Science2014-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/34001Maydup, Maria Luján; Antonietta, Mariana; Graciano, Corina; Guiamet, Juan José; Tambussi, Eduardo Alberto; The contribution of the awns of bread wheat (Triticum aestivum L.) to grain filling: Responses to water deficit and the effects of awns on ear temperature and hydraulic conductance; Elsevier Science; Field Crops Research; 167; 8-2014; 102-1110378-4290CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0378429014002159info:eu-repo/semantics/altIdentifier/doi/10.1016/j.fcr.2014.07.012info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:33:16Zoai:ri.conicet.gov.ar:11336/34001instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 15:33:16.319CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The contribution of the awns of bread wheat (Triticum aestivum L.) to grain filling: Responses to water deficit and the effects of awns on ear temperature and hydraulic conductance
title The contribution of the awns of bread wheat (Triticum aestivum L.) to grain filling: Responses to water deficit and the effects of awns on ear temperature and hydraulic conductance
spellingShingle The contribution of the awns of bread wheat (Triticum aestivum L.) to grain filling: Responses to water deficit and the effects of awns on ear temperature and hydraulic conductance
Maydup, Maria Luján
Awns
Ear Photosynthesis
Grain Filling
Triticum Aestivum
Wheat
title_short The contribution of the awns of bread wheat (Triticum aestivum L.) to grain filling: Responses to water deficit and the effects of awns on ear temperature and hydraulic conductance
title_full The contribution of the awns of bread wheat (Triticum aestivum L.) to grain filling: Responses to water deficit and the effects of awns on ear temperature and hydraulic conductance
title_fullStr The contribution of the awns of bread wheat (Triticum aestivum L.) to grain filling: Responses to water deficit and the effects of awns on ear temperature and hydraulic conductance
title_full_unstemmed The contribution of the awns of bread wheat (Triticum aestivum L.) to grain filling: Responses to water deficit and the effects of awns on ear temperature and hydraulic conductance
title_sort The contribution of the awns of bread wheat (Triticum aestivum L.) to grain filling: Responses to water deficit and the effects of awns on ear temperature and hydraulic conductance
dc.creator.none.fl_str_mv Maydup, Maria Luján
Antonietta, Mariana
Graciano, Corina
Guiamet, Juan José
Tambussi, Eduardo Alberto
author Maydup, Maria Luján
author_facet Maydup, Maria Luján
Antonietta, Mariana
Graciano, Corina
Guiamet, Juan José
Tambussi, Eduardo Alberto
author_role author
author2 Antonietta, Mariana
Graciano, Corina
Guiamet, Juan José
Tambussi, Eduardo Alberto
author2_role author
author
author
author
dc.subject.none.fl_str_mv Awns
Ear Photosynthesis
Grain Filling
Triticum Aestivum
Wheat
topic Awns
Ear Photosynthesis
Grain Filling
Triticum Aestivum
Wheat
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.1
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv The awns of the ear have been reported as important sources of assimilates in wheat. However, their actual importance in grain filling is not well known. We examined several aspects of the awns and their role in the grain filling, and the objectives of this work were: (i) to study their photosynthetic activity during grain filling, comparing flag leaf, ear body and awns in two cultivars differing in ear contribution to grain filling, (ii) to estimate the influence of awns on the temperature and the hydraulic conductance of the ear, (iii) to analyze the response of the flag leaf versus awns to water deficit, particularly regarding relative water content and photosynthetic activity, (iv) to analyze if there is a correlation between awn size versus ear and awn contribution to the grain filling in six modern Argentinean cultivars, and, (v) to explore if awn size and awn contribution have changed during the past century, analyzing old and modern Argentinean cultivars. In this paper we show that: (1) during late grain filling, ear parts (particularly the body of the ear) maintained a higher photosynthetic activity than the flag leaf, (2) awns showed some ‘tolerance’ to water deficit, maintaining a higher relative water content and electron transport rate than the flag leaf under drought, (3) awns increase water conductance of the ear (particularly in the cv. K. Escudo), decrease the ear temperature during the morning, but increase ear temperature after midday (4) there is a moderately positive relationship between awn size and contribution of the ear to grain filling, and (5) in the retrospective analysis we did not find a clear tendency in awn size and awn contribution to grain filling along the years. However, in general terms modern cultivars seem to have a higher awn contribution (and higher awns size) than old ones. In summary, awns may have positive (increased photosynthetic area and activity, tolerance to drought) and negative (increased ear temperature) effects on grain filling, and their final impact on yield will depend on the interaction between these effects and prevailing environmental conditions.
Fil: Maydup, Maria Luján. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina
Fil: Antonietta, Mariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina
Fil: Graciano, Corina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina
Fil: Guiamet, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina
Fil: Tambussi, Eduardo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina
description The awns of the ear have been reported as important sources of assimilates in wheat. However, their actual importance in grain filling is not well known. We examined several aspects of the awns and their role in the grain filling, and the objectives of this work were: (i) to study their photosynthetic activity during grain filling, comparing flag leaf, ear body and awns in two cultivars differing in ear contribution to grain filling, (ii) to estimate the influence of awns on the temperature and the hydraulic conductance of the ear, (iii) to analyze the response of the flag leaf versus awns to water deficit, particularly regarding relative water content and photosynthetic activity, (iv) to analyze if there is a correlation between awn size versus ear and awn contribution to the grain filling in six modern Argentinean cultivars, and, (v) to explore if awn size and awn contribution have changed during the past century, analyzing old and modern Argentinean cultivars. In this paper we show that: (1) during late grain filling, ear parts (particularly the body of the ear) maintained a higher photosynthetic activity than the flag leaf, (2) awns showed some ‘tolerance’ to water deficit, maintaining a higher relative water content and electron transport rate than the flag leaf under drought, (3) awns increase water conductance of the ear (particularly in the cv. K. Escudo), decrease the ear temperature during the morning, but increase ear temperature after midday (4) there is a moderately positive relationship between awn size and contribution of the ear to grain filling, and (5) in the retrospective analysis we did not find a clear tendency in awn size and awn contribution to grain filling along the years. However, in general terms modern cultivars seem to have a higher awn contribution (and higher awns size) than old ones. In summary, awns may have positive (increased photosynthetic area and activity, tolerance to drought) and negative (increased ear temperature) effects on grain filling, and their final impact on yield will depend on the interaction between these effects and prevailing environmental conditions.
publishDate 2014
dc.date.none.fl_str_mv 2014-08
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/34001
Maydup, Maria Luján; Antonietta, Mariana; Graciano, Corina; Guiamet, Juan José; Tambussi, Eduardo Alberto; The contribution of the awns of bread wheat (Triticum aestivum L.) to grain filling: Responses to water deficit and the effects of awns on ear temperature and hydraulic conductance; Elsevier Science; Field Crops Research; 167; 8-2014; 102-111
0378-4290
CONICET Digital
CONICET
url http://hdl.handle.net/11336/34001
identifier_str_mv Maydup, Maria Luján; Antonietta, Mariana; Graciano, Corina; Guiamet, Juan José; Tambussi, Eduardo Alberto; The contribution of the awns of bread wheat (Triticum aestivum L.) to grain filling: Responses to water deficit and the effects of awns on ear temperature and hydraulic conductance; Elsevier Science; Field Crops Research; 167; 8-2014; 102-111
0378-4290
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0378429014002159
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.fcr.2014.07.012
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
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dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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