Role of relative humidity, temperature, and water status in dormancy alleviation of sunflower seeds during dry after-ripening

Autores
Bazin, J.; Batlla, Diego; Dussert, S.; El-Maarouf-Bouteau, H.; Bailly, C.
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The effect of various combinations of temperature and relative humidity on dormancy alleviation of sunflower seeds during dry after-ripening was investigated. The rate of dormancy alleviation depended on both temperature and embryo moisture content (MC). Below an embryo MC of 0.1 g H2O g-1 dw, dormancy release was faster at 15 °C than at higher temperatures. This suggests that dormancy release at low MC was associated with negative activation energy, supported by Arrhenius plots, and low Q10 values. At higher MC, the rate of dormancy alleviation increased with temperature, correlating well with the temperature dependence of biochemical processes. These findings suggests the involvement of two distinct cellular mechanisms in dormancy release; non-enzymatic below 0.1 g H2O g-1 dw and associated with active metabolism above this value. The effects of temperature on seed dormancy release above the threshold MC were analysed using a population-based thermal time approach and a model predicting the rate of dormancy alleviation is provided. Sunflower embryo dormancy release was effective at temperatures above 8 °C (the base temperature for after-ripening, TbAR, was 8.17 °C), and the higher the after-ripening temperature above this threshold value, the higher was the rate of dormancy loss. Thermodynamic analyses of water sorption isotherms revealed that dormancy release was associated with less bound water and increased molecular mobility within the embryonic axes but not the cotyledons. It is proposed that the changes in water binding properties result from oxidative processes and can, in turn, allow metabolic activities.
Fil: Bazin, J.. Universite de Paris VI; Francia
Fil: Batlla, Diego. 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
Fil: Dussert, S.. No especifica;
Fil: El-Maarouf-Bouteau, H.. Universite de Paris VI; Francia
Fil: Bailly, C.. Universite de Paris VI; Francia
Materia
AFTER-RIPENING
PHYSIOLOGICAL DORMANCY
RELATIVE HUMIDITY
SEED
SUNFLOWER
TEMPERATURE
THERMAL TIME
WATER STATUS
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:11336/97681
Acceder
id CONICETDig_05315e4da8231aebfb5c18498e80e5ef
oai_identifier_str oai:ri.conicet.gov.ar:11336/97681
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Role of relative humidity, temperature, and water status in dormancy alleviation of sunflower seeds during dry after-ripeningBazin, J.Batlla, DiegoDussert, S.El-Maarouf-Bouteau, H.Bailly, C.AFTER-RIPENINGPHYSIOLOGICAL DORMANCYRELATIVE HUMIDITYSEEDSUNFLOWERTEMPERATURETHERMAL TIMEWATER STATUShttps://purl.org/becyt/ford/4.5https://purl.org/becyt/ford/4The effect of various combinations of temperature and relative humidity on dormancy alleviation of sunflower seeds during dry after-ripening was investigated. The rate of dormancy alleviation depended on both temperature and embryo moisture content (MC). Below an embryo MC of 0.1 g H2O g-1 dw, dormancy release was faster at 15 °C than at higher temperatures. This suggests that dormancy release at low MC was associated with negative activation energy, supported by Arrhenius plots, and low Q10 values. At higher MC, the rate of dormancy alleviation increased with temperature, correlating well with the temperature dependence of biochemical processes. These findings suggests the involvement of two distinct cellular mechanisms in dormancy release; non-enzymatic below 0.1 g H2O g-1 dw and associated with active metabolism above this value. The effects of temperature on seed dormancy release above the threshold MC were analysed using a population-based thermal time approach and a model predicting the rate of dormancy alleviation is provided. Sunflower embryo dormancy release was effective at temperatures above 8 °C (the base temperature for after-ripening, TbAR, was 8.17 °C), and the higher the after-ripening temperature above this threshold value, the higher was the rate of dormancy loss. Thermodynamic analyses of water sorption isotherms revealed that dormancy release was associated with less bound water and increased molecular mobility within the embryonic axes but not the cotyledons. It is proposed that the changes in water binding properties result from oxidative processes and can, in turn, allow metabolic activities.Fil: Bazin, J.. Universite de Paris VI; FranciaFil: Batlla, Diego. 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; ArgentinaFil: Dussert, S.. No especifica; Fil: El-Maarouf-Bouteau, H.. Universite de Paris VI; FranciaFil: Bailly, C.. Universite de Paris VI; FranciaOxford University Press2011-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/97681Bazin, J.; Batlla, Diego; Dussert, S.; El-Maarouf-Bouteau, H.; Bailly, C.; Role of relative humidity, temperature, and water status in dormancy alleviation of sunflower seeds during dry after-ripening; Oxford University Press; Journal of Experimental Botany; 62; 2; 1-2011; 627-6400022-0957CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1093/jxb/erq314info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/jxb/article/62/2/627/593866info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:23:11Zoai:ri.conicet.gov.ar:11336/97681instacron: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:34982025-09-29 10:23:11.417CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Role of relative humidity, temperature, and water status in dormancy alleviation of sunflower seeds during dry after-ripening
title Role of relative humidity, temperature, and water status in dormancy alleviation of sunflower seeds during dry after-ripening
spellingShingle Role of relative humidity, temperature, and water status in dormancy alleviation of sunflower seeds during dry after-ripening
Bazin, J.
AFTER-RIPENING
PHYSIOLOGICAL DORMANCY
RELATIVE HUMIDITY
SEED
SUNFLOWER
TEMPERATURE
THERMAL TIME
WATER STATUS
title_short Role of relative humidity, temperature, and water status in dormancy alleviation of sunflower seeds during dry after-ripening
title_full Role of relative humidity, temperature, and water status in dormancy alleviation of sunflower seeds during dry after-ripening
title_fullStr Role of relative humidity, temperature, and water status in dormancy alleviation of sunflower seeds during dry after-ripening
title_full_unstemmed Role of relative humidity, temperature, and water status in dormancy alleviation of sunflower seeds during dry after-ripening
title_sort Role of relative humidity, temperature, and water status in dormancy alleviation of sunflower seeds during dry after-ripening
dc.creator.none.fl_str_mv Bazin, J.
Batlla, Diego
Dussert, S.
El-Maarouf-Bouteau, H.
Bailly, C.
author Bazin, J.
author_facet Bazin, J.
Batlla, Diego
Dussert, S.
El-Maarouf-Bouteau, H.
Bailly, C.
author_role author
author2 Batlla, Diego
Dussert, S.
El-Maarouf-Bouteau, H.
Bailly, C.
author2_role author
author
author
author
dc.subject.none.fl_str_mv AFTER-RIPENING
PHYSIOLOGICAL DORMANCY
RELATIVE HUMIDITY
SEED
SUNFLOWER
TEMPERATURE
THERMAL TIME
WATER STATUS
topic AFTER-RIPENING
PHYSIOLOGICAL DORMANCY
RELATIVE HUMIDITY
SEED
SUNFLOWER
TEMPERATURE
THERMAL TIME
WATER STATUS
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.5
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv The effect of various combinations of temperature and relative humidity on dormancy alleviation of sunflower seeds during dry after-ripening was investigated. The rate of dormancy alleviation depended on both temperature and embryo moisture content (MC). Below an embryo MC of 0.1 g H2O g-1 dw, dormancy release was faster at 15 °C than at higher temperatures. This suggests that dormancy release at low MC was associated with negative activation energy, supported by Arrhenius plots, and low Q10 values. At higher MC, the rate of dormancy alleviation increased with temperature, correlating well with the temperature dependence of biochemical processes. These findings suggests the involvement of two distinct cellular mechanisms in dormancy release; non-enzymatic below 0.1 g H2O g-1 dw and associated with active metabolism above this value. The effects of temperature on seed dormancy release above the threshold MC were analysed using a population-based thermal time approach and a model predicting the rate of dormancy alleviation is provided. Sunflower embryo dormancy release was effective at temperatures above 8 °C (the base temperature for after-ripening, TbAR, was 8.17 °C), and the higher the after-ripening temperature above this threshold value, the higher was the rate of dormancy loss. Thermodynamic analyses of water sorption isotherms revealed that dormancy release was associated with less bound water and increased molecular mobility within the embryonic axes but not the cotyledons. It is proposed that the changes in water binding properties result from oxidative processes and can, in turn, allow metabolic activities.
Fil: Bazin, J.. Universite de Paris VI; Francia
Fil: Batlla, Diego. 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
Fil: Dussert, S.. No especifica;
Fil: El-Maarouf-Bouteau, H.. Universite de Paris VI; Francia
Fil: Bailly, C.. Universite de Paris VI; Francia
description The effect of various combinations of temperature and relative humidity on dormancy alleviation of sunflower seeds during dry after-ripening was investigated. The rate of dormancy alleviation depended on both temperature and embryo moisture content (MC). Below an embryo MC of 0.1 g H2O g-1 dw, dormancy release was faster at 15 °C than at higher temperatures. This suggests that dormancy release at low MC was associated with negative activation energy, supported by Arrhenius plots, and low Q10 values. At higher MC, the rate of dormancy alleviation increased with temperature, correlating well with the temperature dependence of biochemical processes. These findings suggests the involvement of two distinct cellular mechanisms in dormancy release; non-enzymatic below 0.1 g H2O g-1 dw and associated with active metabolism above this value. The effects of temperature on seed dormancy release above the threshold MC were analysed using a population-based thermal time approach and a model predicting the rate of dormancy alleviation is provided. Sunflower embryo dormancy release was effective at temperatures above 8 °C (the base temperature for after-ripening, TbAR, was 8.17 °C), and the higher the after-ripening temperature above this threshold value, the higher was the rate of dormancy loss. Thermodynamic analyses of water sorption isotherms revealed that dormancy release was associated with less bound water and increased molecular mobility within the embryonic axes but not the cotyledons. It is proposed that the changes in water binding properties result from oxidative processes and can, in turn, allow metabolic activities.
publishDate 2011
dc.date.none.fl_str_mv 2011-01
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/11336/97681
Bazin, J.; Batlla, Diego; Dussert, S.; El-Maarouf-Bouteau, H.; Bailly, C.; Role of relative humidity, temperature, and water status in dormancy alleviation of sunflower seeds during dry after-ripening; Oxford University Press; Journal of Experimental Botany; 62; 2; 1-2011; 627-640
0022-0957
CONICET Digital
CONICET
url http://hdl.handle.net/11336/97681
identifier_str_mv Bazin, J.; Batlla, Diego; Dussert, S.; El-Maarouf-Bouteau, H.; Bailly, C.; Role of relative humidity, temperature, and water status in dormancy alleviation of sunflower seeds during dry after-ripening; Oxford University Press; Journal of Experimental Botany; 62; 2; 1-2011; 627-640
0022-0957
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1093/jxb/erq314
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/jxb/article/62/2/627/593866
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
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
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
_version_ 1844614225916329984
score 13.070432

Publicaciones similares