Dormancy, germination and emergence of Urochloa panicoides regulated by temperature

Autores
Ustarroz, Diego; Kruk, Betina Claudia; Satorre, Emilio Horacio; Ghersa, Claudio Marco
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Urochloa panicoides is an annual weed of summer crops. In Argentina, in subhumid areas with monsoon rainfall, it germinates and establishes in a single flush. To (i) identify the environmental factors that modify its seed dormancy level and germination and (ii) quantify the parameters describing the thermal behaviour of the germination and emergence dynamics of this weed under non‐limiting water conditions, we established a set of germination experiments performed (i) under controlled conditions using seeds after ripened for 3 or 6 months in different thermal and hydric conditions and (ii) under field conditions, where the soil temperature was modified by applying different shading levels. Seed dormancy level remained high with 3 months after ripening in all treatments. After 6 months, seeds stored at 4°C in dry conditions did not germinate at any temperature, while seeds stored at 25°C in dry conditions and in situ germinated c. 20% and 60% respectively. Germination percentage was higher in seeds harvested before their natural dispersal. The base, optimum and maximum temperatures for seed germination were 6, 35 and 45°C respectively. Shading reduced the number of emerged seedlings, possibly by reducing the soil thermal amplitude. The results explained the dormancy‐breaking mechanism of U. panicoides that allows a high germination rate in the field when rainfall occurs.
EEA Manfredi
Fil: Ustarroz, Diego. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi; Argentina
Fil: Kruk, Betina Claudia. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Cerealicultura; Argentina
Fil: Satorre, Emilio Horacio. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Cerealicultura; Argentina
Fil: Ghersa, Claudio Marco. 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
Fuente
Weed research 56 (1) : 59-68. (February 2016)
Materia
Dormición
Germinación
Emergencia
Temperatura
Dormancy
Germination
Emergence
Temperature
Grass Weed
Malezas
Urochloa Panicoides
After-ripening Condition
Nivel de accesibilidad
acceso restringido
Condiciones de uso
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/4825
Acceder
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network_name_str INTA Digital (INTA)
spelling Dormancy, germination and emergence of Urochloa panicoides regulated by temperatureUstarroz, DiegoKruk, Betina ClaudiaSatorre, Emilio HoracioGhersa, Claudio MarcoDormiciónGerminaciónEmergenciaTemperaturaDormancyGerminationEmergenceTemperatureGrass WeedMalezasUrochloa PanicoidesAfter-ripening ConditionUrochloa panicoides is an annual weed of summer crops. In Argentina, in subhumid areas with monsoon rainfall, it germinates and establishes in a single flush. To (i) identify the environmental factors that modify its seed dormancy level and germination and (ii) quantify the parameters describing the thermal behaviour of the germination and emergence dynamics of this weed under non‐limiting water conditions, we established a set of germination experiments performed (i) under controlled conditions using seeds after ripened for 3 or 6 months in different thermal and hydric conditions and (ii) under field conditions, where the soil temperature was modified by applying different shading levels. Seed dormancy level remained high with 3 months after ripening in all treatments. After 6 months, seeds stored at 4°C in dry conditions did not germinate at any temperature, while seeds stored at 25°C in dry conditions and in situ germinated c. 20% and 60% respectively. Germination percentage was higher in seeds harvested before their natural dispersal. The base, optimum and maximum temperatures for seed germination were 6, 35 and 45°C respectively. Shading reduced the number of emerged seedlings, possibly by reducing the soil thermal amplitude. The results explained the dormancy‐breaking mechanism of U. panicoides that allows a high germination rate in the field when rainfall occurs.EEA ManfrediFil: Ustarroz, Diego. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi; ArgentinaFil: Kruk, Betina Claudia. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Cerealicultura; ArgentinaFil: Satorre, Emilio Horacio. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Cerealicultura; ArgentinaFil: Ghersa, Claudio Marco. 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; ArgentinaWiley; European Weed Research Society2019-04-05T12:49:35Z2019-04-05T12:49:35Z2016-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/4825https://onlinelibrary.wiley.com/doi/full/10.1111/wre.121811365-3180 (Online)https://doi.org/10.1111/wre.12181Weed research 56 (1) : 59-68. (February 2016)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/restrictedAccess2025-09-11T10:22:59Zoai:localhost:20.500.12123/4825instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-11 10:23:00.325INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Dormancy, germination and emergence of Urochloa panicoides regulated by temperature
title Dormancy, germination and emergence of Urochloa panicoides regulated by temperature
spellingShingle Dormancy, germination and emergence of Urochloa panicoides regulated by temperature
Ustarroz, Diego
Dormición
Germinación
Emergencia
Temperatura
Dormancy
Germination
Emergence
Temperature
Grass Weed
Malezas
Urochloa Panicoides
After-ripening Condition
title_short Dormancy, germination and emergence of Urochloa panicoides regulated by temperature
title_full Dormancy, germination and emergence of Urochloa panicoides regulated by temperature
title_fullStr Dormancy, germination and emergence of Urochloa panicoides regulated by temperature
title_full_unstemmed Dormancy, germination and emergence of Urochloa panicoides regulated by temperature
title_sort Dormancy, germination and emergence of Urochloa panicoides regulated by temperature
dc.creator.none.fl_str_mv Ustarroz, Diego
Kruk, Betina Claudia
Satorre, Emilio Horacio
Ghersa, Claudio Marco
author Ustarroz, Diego
author_facet Ustarroz, Diego
Kruk, Betina Claudia
Satorre, Emilio Horacio
Ghersa, Claudio Marco
author_role author
author2 Kruk, Betina Claudia
Satorre, Emilio Horacio
Ghersa, Claudio Marco
author2_role author
author
author
dc.subject.none.fl_str_mv Dormición
Germinación
Emergencia
Temperatura
Dormancy
Germination
Emergence
Temperature
Grass Weed
Malezas
Urochloa Panicoides
After-ripening Condition
topic Dormición
Germinación
Emergencia
Temperatura
Dormancy
Germination
Emergence
Temperature
Grass Weed
Malezas
Urochloa Panicoides
After-ripening Condition
dc.description.none.fl_txt_mv Urochloa panicoides is an annual weed of summer crops. In Argentina, in subhumid areas with monsoon rainfall, it germinates and establishes in a single flush. To (i) identify the environmental factors that modify its seed dormancy level and germination and (ii) quantify the parameters describing the thermal behaviour of the germination and emergence dynamics of this weed under non‐limiting water conditions, we established a set of germination experiments performed (i) under controlled conditions using seeds after ripened for 3 or 6 months in different thermal and hydric conditions and (ii) under field conditions, where the soil temperature was modified by applying different shading levels. Seed dormancy level remained high with 3 months after ripening in all treatments. After 6 months, seeds stored at 4°C in dry conditions did not germinate at any temperature, while seeds stored at 25°C in dry conditions and in situ germinated c. 20% and 60% respectively. Germination percentage was higher in seeds harvested before their natural dispersal. The base, optimum and maximum temperatures for seed germination were 6, 35 and 45°C respectively. Shading reduced the number of emerged seedlings, possibly by reducing the soil thermal amplitude. The results explained the dormancy‐breaking mechanism of U. panicoides that allows a high germination rate in the field when rainfall occurs.
EEA Manfredi
Fil: Ustarroz, Diego. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi; Argentina
Fil: Kruk, Betina Claudia. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Cerealicultura; Argentina
Fil: Satorre, Emilio Horacio. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Cerealicultura; Argentina
Fil: Ghersa, Claudio Marco. 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
description Urochloa panicoides is an annual weed of summer crops. In Argentina, in subhumid areas with monsoon rainfall, it germinates and establishes in a single flush. To (i) identify the environmental factors that modify its seed dormancy level and germination and (ii) quantify the parameters describing the thermal behaviour of the germination and emergence dynamics of this weed under non‐limiting water conditions, we established a set of germination experiments performed (i) under controlled conditions using seeds after ripened for 3 or 6 months in different thermal and hydric conditions and (ii) under field conditions, where the soil temperature was modified by applying different shading levels. Seed dormancy level remained high with 3 months after ripening in all treatments. After 6 months, seeds stored at 4°C in dry conditions did not germinate at any temperature, while seeds stored at 25°C in dry conditions and in situ germinated c. 20% and 60% respectively. Germination percentage was higher in seeds harvested before their natural dispersal. The base, optimum and maximum temperatures for seed germination were 6, 35 and 45°C respectively. Shading reduced the number of emerged seedlings, possibly by reducing the soil thermal amplitude. The results explained the dormancy‐breaking mechanism of U. panicoides that allows a high germination rate in the field when rainfall occurs.
publishDate 2016
dc.date.none.fl_str_mv 2016-02
2019-04-05T12:49:35Z
2019-04-05T12:49:35Z
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/20.500.12123/4825
https://onlinelibrary.wiley.com/doi/full/10.1111/wre.12181
1365-3180 (Online)
https://doi.org/10.1111/wre.12181
url http://hdl.handle.net/20.500.12123/4825
https://onlinelibrary.wiley.com/doi/full/10.1111/wre.12181
https://doi.org/10.1111/wre.12181
identifier_str_mv 1365-3180 (Online)
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/restrictedAccess
eu_rights_str_mv restrictedAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Wiley; European Weed Research Society
publisher.none.fl_str_mv Wiley; European Weed Research Society
dc.source.none.fl_str_mv Weed research 56 (1) : 59-68. (February 2016)
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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score 12.993085

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