Effect of contrasting maternal nitrogen environments on Buglossoides arvensis seed germination response to gibberellic and abscisic acids

Nitrogen availability in Buglossoides arvensis mother plants influences seed dormancy level. Abscisic acid (ABA) levels chiefly determine primary dormancy during embryo maturation and its maintenance depends on ABA/gibberellic acid (GA) balance. We hypothesised that soil nitrogen fertilisation of B...

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Detalles Bibliográficos
Otros Autores: Longás, María de las Mercedes, Sabbatini, Mario Ricardo, Batlla, Diego, Chantre, Guillermo Rubén
Formato: Artículo
Lenguaje:Inglés
Materias:
FLURIDONE
LITHOSPERMUM ARVENSE L.
MATERNAL EFFECT
NITROGEN FERTILIZATION
PACLOBUTRAZO
SEED DORMANCY
SEMIARID REGION
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2021longas.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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245 1 |a Effect of contrasting maternal nitrogen environments on Buglossoides arvensis seed germination response to gibberellic and abscisic acids 
520 |a Nitrogen availability in Buglossoides arvensis mother plants influences seed dormancy level. Abscisic acid (ABA) levels chiefly determine primary dormancy during embryo maturation and its maintenance depends on ABA/gibberellic acid (GA) balance. We hypothesised that soil nitrogen fertilisation of B. arvensis mother plants affects seed sensitivity to hormonal germination promotors and inhibitors. The purpose of the present work was therefore to investigate to what extent the changes that occur in seed germinability as a result of maternal nitrogen fertilisation (with -N(+)- and without -N(−)-) are paralleled by changes in ABA or GAs de novo synthesis and embryonic sensitivity to ABA or GAs. Seed germinability was assessed under a gradient of ABA and GA3 and their corresponding de novo synthesis inhibitors (fluridone -FLU- and paclobutrazol -PBZ-). B. arvensis seeds were incubated at suboptimal (7°C), optimal (15°C) and supraoptimal (20°C) temperatures. Results indicated a higher germination of N(+) seeds, irrespective of hormone type, dose or incubation temperature. N(−) seeds were more sensitive to FLU at 7°C and to GA3 at 15°C, whereas N(+) seeds were more sensitive to FLU at 15-20°C and to PBZ at 7°C. At 20°C, N(+) seed germinability was stimulated by GA3 bounteracting the thermo-inhibitory effect. The higher seed germinability recorded from nitrogen-fertilised plants could be associated to a decrease in seed dormancy levels due to lower ABA levels during embryogenesis, thus requiring a lower amount of GAs to germinate. Further studies are required to confirm this hypothesis. 
650 |2 Agrovoc  |9 26 
653 |a FLURIDONE 
653 |a LITHOSPERMUM ARVENSE L. 
653 |a MATERNAL EFFECT 
653 |a NITROGEN FERTILIZATION 
653 |a PACLOBUTRAZO 
653 |a SEED DORMANCY 
653 |a SEMIARID REGION 
700 1 |a Longás, María de las Mercedes  |u Universidad Nacional del Sur (UNS). Departamento de Agronomía. Bahía Blanca, Argentina.  |u CERZOS. Bahía Blanca, Argentina.  |u CONICET. Bahía Blanca, Buenos Aires, Argentina.  |9 73964 
700 1 |a Sabbatini, Mario Ricardo  |u Universidad Nacional del Sur (UNS). Departamento de Agronomía. Bahía Blanca, Argentina.  |u CERZOS. Bahía Blanca, Argentina.  |u CONICET. Bahía Blanca, Buenos Aires, Argentina.  |9 41945 
700 1 |a Batlla, Diego  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal. Cátedra de Cultivos Industriales. Buenos Aires, Argentina.  |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 11303 
700 1 |a Chantre, Guillermo Rubén  |u Universidad Nacional del Sur (UNS). Departamento de Agronomía. Bahía Blanca, Argentina.  |u CERZOS. Bahía Blanca, Argentina.  |u CONICET. Bahía Blanca, Buenos Aires, Argentina.  |9 47366 
773 0 |t Weed research  |w SECS000181  |g Vol.61, no.3 (2021), p.221-230, grafs., tbls. 
856 |u http://ri.agro.uba.ar/files/intranet/articulo/2021longas.pdf  |f 2021longas  |i En reservorio  |q application/pdf  |x ARTI202206 
856 |u https://www.wiley.com/  |z LINK AL EDITOR 
942 |c ARTICULO 
942 |c ENLINEA 
976 |a AAG 

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