Light sensitivity changes during dormancy induction in Polygonum aviculare L. seeds development of a predictive model of annual changes in seed - bank light sensitivity in relation to soil temperature

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Seeds of weed species require light to terminate dormancy and give way to germination. It is documented that sensitivity to light in Polygonum aviculare seeds increases during dormancy release. However, it is not known whether this sensitivity is lost during dormancy induction. The aim of this study...

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Detalles Bibliográficos
Autor principal: Malavert Pineda, Cristian Jonatan
Otros Autores: Batlla, Diego, Benech Arnold, Roberto Luis
Formato: Capítulo de libro
Lenguaje:Español
Materias:
LOW - FLUENCE RESPONSE (LFR)
PHYTOCHROME
POLYGONUM AVICULARE
SECONDARY DORMANCY
THERMAL TIME
VERY LOW - FLUENCE RESPONSE (VLFR)
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2021malavert.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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100 1 |9 66926  |a Malavert Pineda, Cristian Jonatan  |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.  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal. Cátedra de Cultivos Industriales. Buenos Aires, Argentina. 
245 1 0 |a Light sensitivity changes during dormancy induction in Polygonum aviculare L. seeds  |b development of a predictive model of annual changes in seed - bank light sensitivity in relation to soil temperature 
520 |a Seeds of weed species require light to terminate dormancy and give way to germination. It is documented that sensitivity to light in Polygonum aviculare seeds increases during dormancy release. However, it is not known whether this sensitivity is lost during dormancy induction. The aim of this study was to investigate and quantify the changes in dormancy level of P. aviculare seeds during secondary dormancy induction as measured by changes in sensitivity to light in relation to soil temperature. Polygonum aviculare seeds were stratified at 5ºC until obtaining a minimum dormancy level. The seeds were then induced into secondary dormancy by burying them in pots containing soil which were stored at 10, 15, 20 and 25ºC for different time-periods. Polygonum aviculare seeds were exhumed periodically, exposed to different light treatments (Pfr/Ptotal-pythochrome = 0.76, 0.03 and 7.6 × 10−4) or darkness, and incubated at 15ºC to test germination. Our results showed that the high sensitivity to light acquired during dormancy release and decreased during dormancy induction at a rate that was temperature-dependent. These changes in sensitivity to light were quantified as a function of the accumulation of thermal-time over a base-temperature of 7.9ºC during dormancy induction and were coupled with previous thermal-time index established for the dormancy release process. Both thermal-time indices allowed us to develop a model for the prediction of cyclic changes in sensitivity to light in relation to the thermal environment experienced by the seeds during burial. This model constitutes a valuable tool for predicting weed emergence in the field and to design management practices accordingly. 
650 |2 Agrovoc  |9 26 
653 |a LOW - FLUENCE RESPONSE (LFR) 
653 |a PHYTOCHROME 
653 |a POLYGONUM AVICULARE 
653 |a SECONDARY DORMANCY 
653 |a THERMAL TIME 
653 |a VERY LOW - FLUENCE RESPONSE (VLFR) 
700 1 |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.  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal. Cátedra de Cerealicultura. Buenos Aires, Argentina.  |9 11303 
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.  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal. Cátedra de Cultivos Industriales. Buenos Aires, Argentina. 
773 0 |t Weed research  |g Vol.61, no.2 (2021), p.115–125, grafs.  |w SECS000181 
856 |i En reservorio  |q application/pdf  |x ARTI202210  |f 2021malavert  |u http://ri.agro.uba.ar/files/intranet/articulo/2021malavert.pdf 
856 |u https://www.wiley.com/  |z LINK AL EDITOR 
942 |c ARTICULO 
942 |c ENLINEA 
976 |a AAG 

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