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Documento:
Artículo
Título en inglés:
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
Autor/es:
Malavert Pineda, Cristian Jonatan; Batlla, Diego; Benech Arnold, Roberto Luis
Filiación:
Malavert Pineda, Cristian Jonatan. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Malavert Pineda, Cristian Jonatan. CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Malavert Pineda, Cristian Jonatan. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal. Cátedra de Cultivos Industriales. Buenos Aires, Argentina.
Batlla, Diego. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Batlla, Diego. CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Batlla, Diego. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal. Cátedra de Cerealicultura. Buenos Aires, Argentina.
Benech Arnold, Roberto Luis. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Benech Arnold, Roberto Luis. CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Benech Arnold, Roberto Luis. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal. Cátedra de Cultivos Industriales. Buenos Aires, Argentina.
Año:
2021
Título revista:
Weed Research
ISSN:
0043-1737 (impreso); 1365-3180 (en línea)
Volumen:
61
Número:
2
Páginas:
115–125
Temas:
LOW - FLUENCE RESPONSE (LFR); PHYTOCHROME; POLYGONUM AVICULARE; SECONDARY DORMANCY; THERMAL TIME; VERY LOW - FLUENCE RESPONSE (VLFR)
Idioma:
Inglés
URL al Editor:

Resumen:

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.

Citación:

---------- APA ----------

Malavert Pineda, R. L.; Batlla, D.; & Benech Arnold, R. L. (2021). 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. Weed Research,61, (2),p.115–125
10.1111/wre.12463

---------- CHICAGO ----------

Malavert Pineda, Cristian Jonatan, Batlla, Diego, Benech Arnold, Roberto Luis. 2021. "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". Weed Research 61, no.2:115–125.
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http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2021malavert