Photosynthetic light-response curves in soybean: Impact of nitrogen availability and water deficit during seed filling

Autores
Ergo, Verónica Vanesa; Salvagiotti, Fernando; Luna, Dario Fernando; Carrera, Constanza Soledad
Año de publicación
2026
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Understanding how photosynthesis responds to environmental conditions is essential, as it underpins crop growth and yield. However, yield gains through photosynthesis depend on water and nitrogen availability interactions. The aim of this study was to evaluate how water deficit and nitrogen availability affect photosynthetic light-response curve parameters in field-grown soybean during seed filling. Experiments combined two water levels (irrigated and water deficit during seed filling), two nitrogen levels (unfertilized and fertilized with 600 kg N ha−1, N600) and two genotypes contrasting in seed protein concentration. Water deficit significantly reduced the maximum light-saturated CO2 assimilation rate (Amax), which declined linearly during seed filling. N600 increased leaf chlorophyll content (estimated indirectly through SPAD values) and mitigated drought effects on Amax at the onset of seed filling but did not delay senescence in both genotypes. Adequate nitrogen supply can enhance photosynthetic performance during key reproductive stages, even under drought, but cannot fully compensate for water deficit. Field results show that Amax reduction during seed filling effectively characterizes leaf senescence, highlighting this parameter as a target trait for crop modelling, breeding and management under climate change scenarios.
Instituto de Fisiología y Recursos Genéticos Vegetales
Fil: Ergo, Verónica Vanesa. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina
Fil: Ergo, Verónica Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Estudios Agropecuarios (UDEA); Argentina
Fil: Salvagiotti, Fernando. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Oliveros; Argentina
Fil: Salvagiotti, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Luna, Dario Fernando. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina
Fil: Luna, Dario Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Estudios Agropecuarios (UDEA); Argentina
Fil: Carrera, Constanza Soledad. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina
Fil: Carrera, Constanza Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Estudios Agropecuarios (UDEA); Argentina
Fil: Carrera, Constanza Soledad. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuaria. Área de Ecofisiología de Cultivos (AEC); Argentina
Fuente
Plant biology : 1-10 (2026). (First published: 10 July 2026)
Materia
Drought
Field Experimentation
Photosynthesis
Seed Filling
Senescence
SPAD Units
Soybeans
Nitrogen
Sequía
Experimentación en Campo
Glycine max
Fotosíntesis
Hinchamiento de la Semilla
Avejentamiento
Unidad SPAD
Soja
Nitrógeno
Nitrogen Availability
SPAD Values
Nivel de accesibilidad
acceso restringido
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/27214
Acceder
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oai_identifier_str oai:localhost:20.500.12123/27214
network_acronym_str INTADig
repository_id_str l
network_name_str INTA Digital (INTA)
spelling Photosynthetic light-response curves in soybean: Impact of nitrogen availability and water deficit during seed fillingErgo, Verónica VanesaSalvagiotti, FernandoLuna, Dario FernandoCarrera, Constanza SoledadDroughtField ExperimentationPhotosynthesisSeed FillingSenescenceSPAD UnitsSoybeansNitrogenSequíaExperimentación en CampoGlycine maxFotosíntesisHinchamiento de la SemillaAvejentamientoUnidad SPADSojaNitrógenoNitrogen AvailabilitySPAD ValuesUnderstanding how photosynthesis responds to environmental conditions is essential, as it underpins crop growth and yield. However, yield gains through photosynthesis depend on water and nitrogen availability interactions. The aim of this study was to evaluate how water deficit and nitrogen availability affect photosynthetic light-response curve parameters in field-grown soybean during seed filling. Experiments combined two water levels (irrigated and water deficit during seed filling), two nitrogen levels (unfertilized and fertilized with 600 kg N ha−1, N600) and two genotypes contrasting in seed protein concentration. Water deficit significantly reduced the maximum light-saturated CO2 assimilation rate (Amax), which declined linearly during seed filling. N600 increased leaf chlorophyll content (estimated indirectly through SPAD values) and mitigated drought effects on Amax at the onset of seed filling but did not delay senescence in both genotypes. Adequate nitrogen supply can enhance photosynthetic performance during key reproductive stages, even under drought, but cannot fully compensate for water deficit. Field results show that Amax reduction during seed filling effectively characterizes leaf senescence, highlighting this parameter as a target trait for crop modelling, breeding and management under climate change scenarios.Instituto de Fisiología y Recursos Genéticos VegetalesFil: Ergo, Verónica Vanesa. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; ArgentinaFil: Ergo, Verónica Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Estudios Agropecuarios (UDEA); ArgentinaFil: Salvagiotti, Fernando. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Oliveros; ArgentinaFil: Salvagiotti, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Luna, Dario Fernando. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; ArgentinaFil: Luna, Dario Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Estudios Agropecuarios (UDEA); ArgentinaFil: Carrera, Constanza Soledad. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; ArgentinaFil: Carrera, Constanza Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Estudios Agropecuarios (UDEA); ArgentinaFil: Carrera, Constanza Soledad. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuaria. Área de Ecofisiología de Cultivos (AEC); ArgentinaWiley2026-07-30T14:58:08Z2026-07-30T14:58:08Z2026-07-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/27214https://onlinelibrary.wiley.com/doi/10.1111/plb.702481435-86031438-8677 (Online)https://doi.org/10.1111/plb.70248Plant biology : 1-10 (2026). (First published: 10 July 2026)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repograntAgreement/INTA/2019-PE-E1-I011-001, Intensificacion Sustentable de la Agricultura en la Region Pampeanainfo:eu-repograntAgreement/INTA/2019-PD-E3-I060-001, Adaptación de los cultivos al cambio climático: Bases ecofisiológicas para el manejo y la mejora genéticainfo:eu-repo/semantics/restrictedAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)2026-09-24T11:43:36Zoai:localhost:20.500.12123/27214instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2026-09-24 11:43:37.364INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Photosynthetic light-response curves in soybean: Impact of nitrogen availability and water deficit during seed filling
title Photosynthetic light-response curves in soybean: Impact of nitrogen availability and water deficit during seed filling
spellingShingle Photosynthetic light-response curves in soybean: Impact of nitrogen availability and water deficit during seed filling
Ergo, Verónica Vanesa
Drought
Field Experimentation
Photosynthesis
Seed Filling
Senescence
SPAD Units
Soybeans
Nitrogen
Sequía
Experimentación en Campo
Glycine max
Fotosíntesis
Hinchamiento de la Semilla
Avejentamiento
Unidad SPAD
Soja
Nitrógeno
Nitrogen Availability
SPAD Values
title_short Photosynthetic light-response curves in soybean: Impact of nitrogen availability and water deficit during seed filling
title_full Photosynthetic light-response curves in soybean: Impact of nitrogen availability and water deficit during seed filling
title_fullStr Photosynthetic light-response curves in soybean: Impact of nitrogen availability and water deficit during seed filling
title_full_unstemmed Photosynthetic light-response curves in soybean: Impact of nitrogen availability and water deficit during seed filling
title_sort Photosynthetic light-response curves in soybean: Impact of nitrogen availability and water deficit during seed filling
dc.creator.none.fl_str_mv Ergo, Verónica Vanesa
Salvagiotti, Fernando
Luna, Dario Fernando
Carrera, Constanza Soledad
author Ergo, Verónica Vanesa
author_facet Ergo, Verónica Vanesa
Salvagiotti, Fernando
Luna, Dario Fernando
Carrera, Constanza Soledad
author_role author
author2 Salvagiotti, Fernando
Luna, Dario Fernando
Carrera, Constanza Soledad
author2_role author
author
author
dc.subject.none.fl_str_mv Drought
Field Experimentation
Photosynthesis
Seed Filling
Senescence
SPAD Units
Soybeans
Nitrogen
Sequía
Experimentación en Campo
Glycine max
Fotosíntesis
Hinchamiento de la Semilla
Avejentamiento
Unidad SPAD
Soja
Nitrógeno
Nitrogen Availability
SPAD Values
topic Drought
Field Experimentation
Photosynthesis
Seed Filling
Senescence
SPAD Units
Soybeans
Nitrogen
Sequía
Experimentación en Campo
Glycine max
Fotosíntesis
Hinchamiento de la Semilla
Avejentamiento
Unidad SPAD
Soja
Nitrógeno
Nitrogen Availability
SPAD Values
dc.description.none.fl_txt_mv Understanding how photosynthesis responds to environmental conditions is essential, as it underpins crop growth and yield. However, yield gains through photosynthesis depend on water and nitrogen availability interactions. The aim of this study was to evaluate how water deficit and nitrogen availability affect photosynthetic light-response curve parameters in field-grown soybean during seed filling. Experiments combined two water levels (irrigated and water deficit during seed filling), two nitrogen levels (unfertilized and fertilized with 600 kg N ha−1, N600) and two genotypes contrasting in seed protein concentration. Water deficit significantly reduced the maximum light-saturated CO2 assimilation rate (Amax), which declined linearly during seed filling. N600 increased leaf chlorophyll content (estimated indirectly through SPAD values) and mitigated drought effects on Amax at the onset of seed filling but did not delay senescence in both genotypes. Adequate nitrogen supply can enhance photosynthetic performance during key reproductive stages, even under drought, but cannot fully compensate for water deficit. Field results show that Amax reduction during seed filling effectively characterizes leaf senescence, highlighting this parameter as a target trait for crop modelling, breeding and management under climate change scenarios.
Instituto de Fisiología y Recursos Genéticos Vegetales
Fil: Ergo, Verónica Vanesa. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina
Fil: Ergo, Verónica Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Estudios Agropecuarios (UDEA); Argentina
Fil: Salvagiotti, Fernando. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Oliveros; Argentina
Fil: Salvagiotti, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Luna, Dario Fernando. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina
Fil: Luna, Dario Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Estudios Agropecuarios (UDEA); Argentina
Fil: Carrera, Constanza Soledad. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina
Fil: Carrera, Constanza Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Estudios Agropecuarios (UDEA); Argentina
Fil: Carrera, Constanza Soledad. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuaria. Área de Ecofisiología de Cultivos (AEC); Argentina
description Understanding how photosynthesis responds to environmental conditions is essential, as it underpins crop growth and yield. However, yield gains through photosynthesis depend on water and nitrogen availability interactions. The aim of this study was to evaluate how water deficit and nitrogen availability affect photosynthetic light-response curve parameters in field-grown soybean during seed filling. Experiments combined two water levels (irrigated and water deficit during seed filling), two nitrogen levels (unfertilized and fertilized with 600 kg N ha−1, N600) and two genotypes contrasting in seed protein concentration. Water deficit significantly reduced the maximum light-saturated CO2 assimilation rate (Amax), which declined linearly during seed filling. N600 increased leaf chlorophyll content (estimated indirectly through SPAD values) and mitigated drought effects on Amax at the onset of seed filling but did not delay senescence in both genotypes. Adequate nitrogen supply can enhance photosynthetic performance during key reproductive stages, even under drought, but cannot fully compensate for water deficit. Field results show that Amax reduction during seed filling effectively characterizes leaf senescence, highlighting this parameter as a target trait for crop modelling, breeding and management under climate change scenarios.
publishDate 2026
dc.date.none.fl_str_mv 2026-07-30T14:58:08Z
2026-07-30T14:58:08Z
2026-07-10
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/20.500.12123/27214
https://onlinelibrary.wiley.com/doi/10.1111/plb.70248
1435-8603
1438-8677 (Online)
https://doi.org/10.1111/plb.70248
url http://hdl.handle.net/20.500.12123/27214
https://onlinelibrary.wiley.com/doi/10.1111/plb.70248
https://doi.org/10.1111/plb.70248
identifier_str_mv 1435-8603
1438-8677 (Online)
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repograntAgreement/INTA/2019-PE-E1-I011-001, Intensificacion Sustentable de la Agricultura en la Region Pampeana
info:eu-repograntAgreement/INTA/2019-PD-E3-I060-001, Adaptación de los cultivos al cambio climático: Bases ecofisiológicas para el manejo y la mejora genética
dc.rights.none.fl_str_mv info:eu-repo/semantics/restrictedAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv restrictedAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv Plant biology : 1-10 (2026). (First published: 10 July 2026)
reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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