Pericarp - imposed dormancy in sunflower physiological basis, impact on crop emergence, and removal at an industrial scale

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Sunflower (Helianthus annuus L.) achenes often display pericarp-imposed dormancy, which is long-lasting and causes serious problems to crop production and the seed industry. For this study we assessed an extensively used sunflower inbred line that has this type of dormancy. Our goals were (i) to det...

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Detalles Bibliográficos
Otros Autores: Dominguez, Constanza Pía, Batlla, Diego, Rodríguez, María Verónica, Windauer, Liliana Beatriz, Gerbaldo, Magdalena María, Benech Arnold, Roberto Luis
Formato: Libro
Lenguaje:Inglés
Materias:
ABSCISIC ACID
ARABIDOPSIS
SEED DORMANCY
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2016dominguez.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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024 |a 10.2135/cropsci2015.06.0335 
040 |a AR-BaUFA 
245 1 |a Pericarp - imposed dormancy in sunflower  |b physiological basis, impact on crop emergence, and removal at an industrial scale 
520 |a Sunflower (Helianthus annuus L.) achenes often display pericarp-imposed dormancy, which is long-lasting and causes serious problems to crop production and the seed industry. For this study we assessed an extensively used sunflower inbred line that has this type of dormancy. Our goals were (i) to determine the effect of pericarp on germination and to evaluate its impact on crop field emergence, (ii) to provide insight into the physiological basis of pericarp-imposed dormancy by determining the effects of abscisic acid (ABA) accumulation in the embryo and the embryo sensitivity to ABA during incubation at different temperatures, (iii) to assess the effect of oxidant agents and other compounds on dormancy termination, and (iv) to evaluate the feasibility of using oxidants to remove dormancy at an industrial scale. Incubation at high temperatures (i.e., 25 to 30°C) allowed the expression of dormancy, which was imposed by the pericarp and was accompanied by an increase in embryo sensitivity to ABA, but not in ABA concentration. Treated achenes with sodium hypochlorite, or their incubation in presence of an ethylene precursor or gibberellins overcame dormancy. ABA concentration decreased during incubation when treated with sodium hypochlorite. Application of sodium hypochlorite on a commercial seed lot (i.e., washing with 3 and 7%, after additional chemicals used by the industry were applied) resulted in higher germination compared with dormant non-treated controls. Field trials showed that pericarp-imposed dormancy reduced crop emergence in the inbred line tested herein. However, treating achenes with sodium hypochlorite using described industrial procedures improved field emergence. 
653 |a ABSCISIC ACID 
653 |a ARABIDOPSIS 
653 |a SEED DORMANCY 
700 1 |a Dominguez, Constanza Pía  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |9 32585 
700 1 |9 11303  |a Batlla, Diego  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. 
700 1 |9 58187  |a Rodríguez, María Verónica  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. 
700 1 |9 9670  |a Windauer, Liliana Beatriz  |u Universidad de Buenos Aires. Facultad de Agronomía. Laboratorio de Biología de Semillas. Buenos Aires, Argentina. 
700 1 |a Gerbaldo, Magdalena María  |u Dow AgroSciences. Colón, Entre Ríos, Argentina.  |9 12284 
700 1 |9 663  |a Benech Arnold, Roberto Luis  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. 
773 0 |t Crop science  |w SECS000064  |g Vol.56, no.2 (2016), p.716–726, tbls., grafs. 
856 |f 2016dominguez  |i En reservorio:  |q application/pdf  |u http://ri.agro.uba.ar/files/intranet/articulo/2016dominguez.pdf  |x ARTI201810 
856 |u https://www.crops.org/  |z LINK AL EDITOR 
942 |c ARTICULO 
942 |c ENLINEA 
976 |a AAG 

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