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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/97681
Ver los metadatos del registro completo
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oai:ri.conicet.gov.ar:11336/97681 |
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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 Técnicas2025-09-03T10:04:19Zoai: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:34982025-09-03 10:04:19.91CONICET 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_ |
1842269850981892096 |
score |
13.13397 |