Heat stress effects around flowering on kernel set of temperate and tropical maize hybrids

Autores
Rattalino Edreira, Juan Ignacio; Budakli Carpici, E.; Sammarro, D.; Otegui, Maria Elena
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Final kernel number in the uppermost ear of temperate maize (Zea mays L.) hybrids is smaller than the potential represented by the number of florets differentiated in this ear, and than the number of silks exposed from it (i.e., kernel set <1). This trend increases when stressful conditions affect plant growth immediately before (GS1) or during (GS2) silking, but the magnitude of change has not been documented for heat stress effects and hybrids of tropical background. In this work we evaluated mentioned traits in field experiments (Exp1 and Exp2), including (i) two temperature regimes, control and heated during daytime hours (ca. 33-40°C at ear level), (ii) two 15-d periods during GS1 and GS2, and (iii) three hybrids (Te: temperate; Tr: tropical; TeTr: Te×Tr). We also measured crop anthesis and silking dynamics, silk exposure of individual plants, and the anthesis-silking interval (ASI). Three sources of kernel loss were identified: decreased floret differentiation, pollination failure, and kernel abortion. Heating affected all surveyed traits, but negative effects on flowering dynamics were larger (i) for anthesis than for silking with the concomitant decrease in ASI, and (ii) for GS1 than for GS2. Heat also caused a decrease in the number of (i) florets only when performed during GS1 (-15.5% in Exp1 and -9.1% in Exp2), and only among Te and TeTr hybrids, (ii) exposed silks of all GS×Hybrid combinations, and (iii) harvestable kernels (mean of -51.8% in GS1 and -74.5% in GS2). Kernel abortion explained 95% of the variation in final kernel numbers (P<0.001), and negative heat effects were larger on this loss (38.6%) than on other losses (≤11.3%). The tropical genetic background conferred an enhanced capacity for enduring most negative effects of heating.
Fil: Rattalino Edreira, Juan Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina
Fil: Budakli Carpici, E.. Uludag University. Faculty of Agronomy. Department of Field Crops; Turquía. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina
Fil: Sammarro, D.. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; 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. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina
Materia
FLOWERING DYNAMICS
GENOTYPES
HEAT STRESS
KERNEL SET
MAIZE
SILK EXPOSURE DYNAMICS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/99080
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/99080
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Heat stress effects around flowering on kernel set of temperate and tropical maize hybridsRattalino Edreira, Juan IgnacioBudakli Carpici, E.Sammarro, D.Otegui, Maria ElenaFLOWERING DYNAMICSGENOTYPESHEAT STRESSKERNEL SETMAIZESILK EXPOSURE DYNAMICShttps://purl.org/becyt/ford/4.1https://purl.org/becyt/ford/4Final kernel number in the uppermost ear of temperate maize (Zea mays L.) hybrids is smaller than the potential represented by the number of florets differentiated in this ear, and than the number of silks exposed from it (i.e., kernel set <1). This trend increases when stressful conditions affect plant growth immediately before (GS1) or during (GS2) silking, but the magnitude of change has not been documented for heat stress effects and hybrids of tropical background. In this work we evaluated mentioned traits in field experiments (Exp1 and Exp2), including (i) two temperature regimes, control and heated during daytime hours (ca. 33-40°C at ear level), (ii) two 15-d periods during GS1 and GS2, and (iii) three hybrids (Te: temperate; Tr: tropical; TeTr: Te×Tr). We also measured crop anthesis and silking dynamics, silk exposure of individual plants, and the anthesis-silking interval (ASI). Three sources of kernel loss were identified: decreased floret differentiation, pollination failure, and kernel abortion. Heating affected all surveyed traits, but negative effects on flowering dynamics were larger (i) for anthesis than for silking with the concomitant decrease in ASI, and (ii) for GS1 than for GS2. Heat also caused a decrease in the number of (i) florets only when performed during GS1 (-15.5% in Exp1 and -9.1% in Exp2), and only among Te and TeTr hybrids, (ii) exposed silks of all GS×Hybrid combinations, and (iii) harvestable kernels (mean of -51.8% in GS1 and -74.5% in GS2). Kernel abortion explained 95% of the variation in final kernel numbers (P<0.001), and negative heat effects were larger on this loss (38.6%) than on other losses (≤11.3%). The tropical genetic background conferred an enhanced capacity for enduring most negative effects of heating.Fil: Rattalino Edreira, Juan Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; ArgentinaFil: Budakli Carpici, E.. Uludag University. Faculty of Agronomy. Department of Field Crops; Turquía. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; ArgentinaFil: Sammarro, D.. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; 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. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; ArgentinaElsevier Science2011-08info: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/11336/99080Rattalino Edreira, Juan Ignacio; Budakli Carpici, E.; Sammarro, D.; Otegui, Maria Elena; Heat stress effects around flowering on kernel set of temperate and tropical maize hybrids; Elsevier Science; Field Crops Research; 123; 2; 8-2011; 62-730378-4290CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.fcr.2011.04.015info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0378429011001407info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:31:14Zoai:ri.conicet.gov.ar:11336/99080instacron: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 15:31:14.501CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Heat stress effects around flowering on kernel set of temperate and tropical maize hybrids
title Heat stress effects around flowering on kernel set of temperate and tropical maize hybrids
spellingShingle Heat stress effects around flowering on kernel set of temperate and tropical maize hybrids
Rattalino Edreira, Juan Ignacio
FLOWERING DYNAMICS
GENOTYPES
HEAT STRESS
KERNEL SET
MAIZE
SILK EXPOSURE DYNAMICS
title_short Heat stress effects around flowering on kernel set of temperate and tropical maize hybrids
title_full Heat stress effects around flowering on kernel set of temperate and tropical maize hybrids
title_fullStr Heat stress effects around flowering on kernel set of temperate and tropical maize hybrids
title_full_unstemmed Heat stress effects around flowering on kernel set of temperate and tropical maize hybrids
title_sort Heat stress effects around flowering on kernel set of temperate and tropical maize hybrids
dc.creator.none.fl_str_mv Rattalino Edreira, Juan Ignacio
Budakli Carpici, E.
Sammarro, D.
Otegui, Maria Elena
author Rattalino Edreira, Juan Ignacio
author_facet Rattalino Edreira, Juan Ignacio
Budakli Carpici, E.
Sammarro, D.
Otegui, Maria Elena
author_role author
author2 Budakli Carpici, E.
Sammarro, D.
Otegui, Maria Elena
author2_role author
author
author
dc.subject.none.fl_str_mv FLOWERING DYNAMICS
GENOTYPES
HEAT STRESS
KERNEL SET
MAIZE
SILK EXPOSURE DYNAMICS
topic FLOWERING DYNAMICS
GENOTYPES
HEAT STRESS
KERNEL SET
MAIZE
SILK EXPOSURE DYNAMICS
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.1
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv Final kernel number in the uppermost ear of temperate maize (Zea mays L.) hybrids is smaller than the potential represented by the number of florets differentiated in this ear, and than the number of silks exposed from it (i.e., kernel set <1). This trend increases when stressful conditions affect plant growth immediately before (GS1) or during (GS2) silking, but the magnitude of change has not been documented for heat stress effects and hybrids of tropical background. In this work we evaluated mentioned traits in field experiments (Exp1 and Exp2), including (i) two temperature regimes, control and heated during daytime hours (ca. 33-40°C at ear level), (ii) two 15-d periods during GS1 and GS2, and (iii) three hybrids (Te: temperate; Tr: tropical; TeTr: Te×Tr). We also measured crop anthesis and silking dynamics, silk exposure of individual plants, and the anthesis-silking interval (ASI). Three sources of kernel loss were identified: decreased floret differentiation, pollination failure, and kernel abortion. Heating affected all surveyed traits, but negative effects on flowering dynamics were larger (i) for anthesis than for silking with the concomitant decrease in ASI, and (ii) for GS1 than for GS2. Heat also caused a decrease in the number of (i) florets only when performed during GS1 (-15.5% in Exp1 and -9.1% in Exp2), and only among Te and TeTr hybrids, (ii) exposed silks of all GS×Hybrid combinations, and (iii) harvestable kernels (mean of -51.8% in GS1 and -74.5% in GS2). Kernel abortion explained 95% of the variation in final kernel numbers (P<0.001), and negative heat effects were larger on this loss (38.6%) than on other losses (≤11.3%). The tropical genetic background conferred an enhanced capacity for enduring most negative effects of heating.
Fil: Rattalino Edreira, Juan Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina
Fil: Budakli Carpici, E.. Uludag University. Faculty of Agronomy. Department of Field Crops; Turquía. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina
Fil: Sammarro, D.. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; 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. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina
description Final kernel number in the uppermost ear of temperate maize (Zea mays L.) hybrids is smaller than the potential represented by the number of florets differentiated in this ear, and than the number of silks exposed from it (i.e., kernel set <1). This trend increases when stressful conditions affect plant growth immediately before (GS1) or during (GS2) silking, but the magnitude of change has not been documented for heat stress effects and hybrids of tropical background. In this work we evaluated mentioned traits in field experiments (Exp1 and Exp2), including (i) two temperature regimes, control and heated during daytime hours (ca. 33-40°C at ear level), (ii) two 15-d periods during GS1 and GS2, and (iii) three hybrids (Te: temperate; Tr: tropical; TeTr: Te×Tr). We also measured crop anthesis and silking dynamics, silk exposure of individual plants, and the anthesis-silking interval (ASI). Three sources of kernel loss were identified: decreased floret differentiation, pollination failure, and kernel abortion. Heating affected all surveyed traits, but negative effects on flowering dynamics were larger (i) for anthesis than for silking with the concomitant decrease in ASI, and (ii) for GS1 than for GS2. Heat also caused a decrease in the number of (i) florets only when performed during GS1 (-15.5% in Exp1 and -9.1% in Exp2), and only among Te and TeTr hybrids, (ii) exposed silks of all GS×Hybrid combinations, and (iii) harvestable kernels (mean of -51.8% in GS1 and -74.5% in GS2). Kernel abortion explained 95% of the variation in final kernel numbers (P<0.001), and negative heat effects were larger on this loss (38.6%) than on other losses (≤11.3%). The tropical genetic background conferred an enhanced capacity for enduring most negative effects of heating.
publishDate 2011
dc.date.none.fl_str_mv 2011-08
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/11336/99080
Rattalino Edreira, Juan Ignacio; Budakli Carpici, E.; Sammarro, D.; Otegui, Maria Elena; Heat stress effects around flowering on kernel set of temperate and tropical maize hybrids; Elsevier Science; Field Crops Research; 123; 2; 8-2011; 62-73
0378-4290
CONICET Digital
CONICET
url http://hdl.handle.net/11336/99080
identifier_str_mv Rattalino Edreira, Juan Ignacio; Budakli Carpici, E.; Sammarro, D.; Otegui, Maria Elena; Heat stress effects around flowering on kernel set of temperate and tropical maize hybrids; Elsevier Science; Field Crops Research; 123; 2; 8-2011; 62-73
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/doi/10.1016/j.fcr.2011.04.015
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0378429011001407
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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 13.22299

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