Heat stress in temperate and tropical maize hybrids: Kernel growth, water relations and assimilate availability for grain filling

Autores
Rattalino Edreira, Juan Ignacio; Mayer, Luis Ignacio; Otegui, Maria Elena
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Several studies have indicated that maize (Zea mays L.) kernel weight is severely affected by heat stress, but this response was never evaluated under field conditions. Our objective was to assess the effect of brief episodes of above-optimum temperatures on the dynamics of biomass and water accumulation in kernels of maize hybrids with contrasting tolerance to heat stress. Heat effect on assimilate supply from the plant (i.e., current biomass production and water-soluble carbohydrates in stem) to developing grains was also analyzed. Field experiments included a factorial combination of (i) three hybrids (Te: temperate; Tr: tropical; TeTr: Te×Tr), (ii) two temperature regimes, control and heated during daytime hours (ca. 33?40 °C at ear level), and (ii) three 15-d periods (GS1: immediately before anthesis; GS2: from silking onwards; GS3: early phase of active grain filling). Heat effects on final kernel weight were larger (i) when they occurred during the first half of effective grain filling (-23.1% for GS3) than around flowering (-4.8% for GS1, -6.3% for GS2), and (ii) for the Te hybrid (-20.4%) than for the TeTr (-8.6%) and the Tr (-6.8%) hybrids. Heating around flowering (i) enhanced the assimilate availability per kernel during the effective grain-filling period, (ii) increased carbohydrates reserves in stem at physiological maturity, (iii) and had no significant effect on the dynamics of biomass and water accumulation in kernels. The opposite trend was detected among plots heated during GS3, which mostly exhibited the interruption of grain filling. Robust associations were established between (i) carbohydrate reserves in stem at physiological maturity and assimilate availability per kernel during effective grain filling (r²=0.49; P <0.001), and (ii) the rate of water loss from kernels and the duration of effective grain filling (r²=0.71; P<0.001). These responses underlay the enhanced sensitivity to heat stress of the hybrid with full temperate genetic background.
Fil: Rattalino Edreira, Juan Ignacio. Universidad Nacional de la Pampa. Facultad de Agronomia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina
Fil: Mayer, Luis Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina
Fil: Otegui, Maria Elena. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina
Materia
Heat Stress
Maize
Kernel Weight
Grain Filling
Assimilate Availability
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:11336/4170
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/4170
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Heat stress in temperate and tropical maize hybrids: Kernel growth, water relations and assimilate availability for grain fillingRattalino Edreira, Juan IgnacioMayer, Luis IgnacioOtegui, Maria ElenaHeat StressMaizeKernel WeightGrain FillingAssimilate Availabilityhttps://purl.org/becyt/ford/4.1https://purl.org/becyt/ford/4Several studies have indicated that maize (Zea mays L.) kernel weight is severely affected by heat stress, but this response was never evaluated under field conditions. Our objective was to assess the effect of brief episodes of above-optimum temperatures on the dynamics of biomass and water accumulation in kernels of maize hybrids with contrasting tolerance to heat stress. Heat effect on assimilate supply from the plant (i.e., current biomass production and water-soluble carbohydrates in stem) to developing grains was also analyzed. Field experiments included a factorial combination of (i) three hybrids (Te: temperate; Tr: tropical; TeTr: Te×Tr), (ii) two temperature regimes, control and heated during daytime hours (ca. 33?40 °C at ear level), and (ii) three 15-d periods (GS1: immediately before anthesis; GS2: from silking onwards; GS3: early phase of active grain filling). Heat effects on final kernel weight were larger (i) when they occurred during the first half of effective grain filling (-23.1% for GS3) than around flowering (-4.8% for GS1, -6.3% for GS2), and (ii) for the Te hybrid (-20.4%) than for the TeTr (-8.6%) and the Tr (-6.8%) hybrids. Heating around flowering (i) enhanced the assimilate availability per kernel during the effective grain-filling period, (ii) increased carbohydrates reserves in stem at physiological maturity, (iii) and had no significant effect on the dynamics of biomass and water accumulation in kernels. The opposite trend was detected among plots heated during GS3, which mostly exhibited the interruption of grain filling. Robust associations were established between (i) carbohydrate reserves in stem at physiological maturity and assimilate availability per kernel during effective grain filling (r²=0.49; P <0.001), and (ii) the rate of water loss from kernels and the duration of effective grain filling (r²=0.71; P<0.001). These responses underlay the enhanced sensitivity to heat stress of the hybrid with full temperate genetic background.Fil: Rattalino Edreira, Juan Ignacio. Universidad Nacional de la Pampa. Facultad de Agronomia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; ArgentinaFil: Mayer, Luis Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; ArgentinaFil: Otegui, Maria Elena. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; ArgentinaElsevier2014-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/4170Rattalino Edreira, Juan Ignacio; Mayer, Luis Ignacio; Otegui, Maria Elena; Heat stress in temperate and tropical maize hybrids: Kernel growth, water relations and assimilate availability for grain filling; Elsevier; Field Crops Research; 166; 6-2014; 162-1720378-4290enginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0378429014001634info:eu-repo/semantics/altIdentifier/issn/0378-4290info:eu-repo/semantics/altIdentifier/doi/10.1016/j.fcr.2014.06.018info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:43:37Zoai:ri.conicet.gov.ar:11336/4170instacron: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 15:43:38.094CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Heat stress in temperate and tropical maize hybrids: Kernel growth, water relations and assimilate availability for grain filling
title Heat stress in temperate and tropical maize hybrids: Kernel growth, water relations and assimilate availability for grain filling
spellingShingle Heat stress in temperate and tropical maize hybrids: Kernel growth, water relations and assimilate availability for grain filling
Rattalino Edreira, Juan Ignacio
Heat Stress
Maize
Kernel Weight
Grain Filling
Assimilate Availability
title_short Heat stress in temperate and tropical maize hybrids: Kernel growth, water relations and assimilate availability for grain filling
title_full Heat stress in temperate and tropical maize hybrids: Kernel growth, water relations and assimilate availability for grain filling
title_fullStr Heat stress in temperate and tropical maize hybrids: Kernel growth, water relations and assimilate availability for grain filling
title_full_unstemmed Heat stress in temperate and tropical maize hybrids: Kernel growth, water relations and assimilate availability for grain filling
title_sort Heat stress in temperate and tropical maize hybrids: Kernel growth, water relations and assimilate availability for grain filling
dc.creator.none.fl_str_mv Rattalino Edreira, Juan Ignacio
Mayer, Luis Ignacio
Otegui, Maria Elena
author Rattalino Edreira, Juan Ignacio
author_facet Rattalino Edreira, Juan Ignacio
Mayer, Luis Ignacio
Otegui, Maria Elena
author_role author
author2 Mayer, Luis Ignacio
Otegui, Maria Elena
author2_role author
author
dc.subject.none.fl_str_mv Heat Stress
Maize
Kernel Weight
Grain Filling
Assimilate Availability
topic Heat Stress
Maize
Kernel Weight
Grain Filling
Assimilate Availability
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.1
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv Several studies have indicated that maize (Zea mays L.) kernel weight is severely affected by heat stress, but this response was never evaluated under field conditions. Our objective was to assess the effect of brief episodes of above-optimum temperatures on the dynamics of biomass and water accumulation in kernels of maize hybrids with contrasting tolerance to heat stress. Heat effect on assimilate supply from the plant (i.e., current biomass production and water-soluble carbohydrates in stem) to developing grains was also analyzed. Field experiments included a factorial combination of (i) three hybrids (Te: temperate; Tr: tropical; TeTr: Te×Tr), (ii) two temperature regimes, control and heated during daytime hours (ca. 33?40 °C at ear level), and (ii) three 15-d periods (GS1: immediately before anthesis; GS2: from silking onwards; GS3: early phase of active grain filling). Heat effects on final kernel weight were larger (i) when they occurred during the first half of effective grain filling (-23.1% for GS3) than around flowering (-4.8% for GS1, -6.3% for GS2), and (ii) for the Te hybrid (-20.4%) than for the TeTr (-8.6%) and the Tr (-6.8%) hybrids. Heating around flowering (i) enhanced the assimilate availability per kernel during the effective grain-filling period, (ii) increased carbohydrates reserves in stem at physiological maturity, (iii) and had no significant effect on the dynamics of biomass and water accumulation in kernels. The opposite trend was detected among plots heated during GS3, which mostly exhibited the interruption of grain filling. Robust associations were established between (i) carbohydrate reserves in stem at physiological maturity and assimilate availability per kernel during effective grain filling (r²=0.49; P <0.001), and (ii) the rate of water loss from kernels and the duration of effective grain filling (r²=0.71; P<0.001). These responses underlay the enhanced sensitivity to heat stress of the hybrid with full temperate genetic background.
Fil: Rattalino Edreira, Juan Ignacio. Universidad Nacional de la Pampa. Facultad de Agronomia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina
Fil: Mayer, Luis Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina
Fil: Otegui, Maria Elena. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina
description Several studies have indicated that maize (Zea mays L.) kernel weight is severely affected by heat stress, but this response was never evaluated under field conditions. Our objective was to assess the effect of brief episodes of above-optimum temperatures on the dynamics of biomass and water accumulation in kernels of maize hybrids with contrasting tolerance to heat stress. Heat effect on assimilate supply from the plant (i.e., current biomass production and water-soluble carbohydrates in stem) to developing grains was also analyzed. Field experiments included a factorial combination of (i) three hybrids (Te: temperate; Tr: tropical; TeTr: Te×Tr), (ii) two temperature regimes, control and heated during daytime hours (ca. 33?40 °C at ear level), and (ii) three 15-d periods (GS1: immediately before anthesis; GS2: from silking onwards; GS3: early phase of active grain filling). Heat effects on final kernel weight were larger (i) when they occurred during the first half of effective grain filling (-23.1% for GS3) than around flowering (-4.8% for GS1, -6.3% for GS2), and (ii) for the Te hybrid (-20.4%) than for the TeTr (-8.6%) and the Tr (-6.8%) hybrids. Heating around flowering (i) enhanced the assimilate availability per kernel during the effective grain-filling period, (ii) increased carbohydrates reserves in stem at physiological maturity, (iii) and had no significant effect on the dynamics of biomass and water accumulation in kernels. The opposite trend was detected among plots heated during GS3, which mostly exhibited the interruption of grain filling. Robust associations were established between (i) carbohydrate reserves in stem at physiological maturity and assimilate availability per kernel during effective grain filling (r²=0.49; P <0.001), and (ii) the rate of water loss from kernels and the duration of effective grain filling (r²=0.71; P<0.001). These responses underlay the enhanced sensitivity to heat stress of the hybrid with full temperate genetic background.
publishDate 2014
dc.date.none.fl_str_mv 2014-06
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/11336/4170
Rattalino Edreira, Juan Ignacio; Mayer, Luis Ignacio; Otegui, Maria Elena; Heat stress in temperate and tropical maize hybrids: Kernel growth, water relations and assimilate availability for grain filling; Elsevier; Field Crops Research; 166; 6-2014; 162-172
0378-4290
url http://hdl.handle.net/11336/4170
identifier_str_mv Rattalino Edreira, Juan Ignacio; Mayer, Luis Ignacio; Otegui, Maria Elena; Heat stress in temperate and tropical maize hybrids: Kernel growth, water relations and assimilate availability for grain filling; Elsevier; Field Crops Research; 166; 6-2014; 162-172
0378-4290
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/S0378429014001634
info:eu-repo/semantics/altIdentifier/issn/0378-4290
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.fcr.2014.06.018
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/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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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score 12.891075

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