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Artículo

Seed dormancy and germination in different populations of the Argentinan endemic halophyte grass, Sporobolus phleoides (Poaceae: Chloridoideae)

Richard, Geraldina AliciaIcon ; Cerino, María CarolinaIcon ; Pensiero, Jose FranciscoIcon ; Zabala, Juan Marcelo
Fecha de publicación: 09/2016
Editorial: Csiro Publishing
Revista: Australian Journal of Botany
ISSN: 0067-1924
Idioma: Inglés
Tipo de recurso: Artículo publicado

Resumen

Sporobolus phleoides Hack. is an endemic grass of Argentina that is considered an important genetic resource for saline environments. Knowledge of its germination behaviour is an indispensable requirement for the future potential use of this species. Thus, the effects of different factors on germination were evaluated in six representative populations collected from plants cultivated in a uniform environment. In addition, we investigated how the different parts of the seed contributed to dormancy and intraspecific variability. S. phleoides has non-deep physiological dormancy that appeared to be related to its testa. Thereby, dormancy was completely removed with puncturing treatments. High levels of germination were also obtained in seeds stratified at 8°C over 100 days in a solution of nitrates. After-ripening treatment did not have a significant effect in breaking dormancy. Similar germination behaviour and dormancy levels were observed in the different populations, especially when they were subjected to cold stratification. Although further work is needed, cold stratification appears to be the major factor in determining the time of seedling establishment in natural environments for this species.
Palabras clave: After-Ripening , Cold Stratification , Nitrates , Non-Deep Physiological Dormancy , Seed Coat
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/71539
DOI: https://dx.doi.org/10.1071/BT15285
URL: http://www.publish.csiro.au/bt/BT15285
Colecciones
Articulos(CCT - SANTA FE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SANTA FE
Citación
Richard, Geraldina Alicia; Cerino, María Carolina; Pensiero, Jose Francisco; Zabala, Juan Marcelo; Seed dormancy and germination in different populations of the Argentinan endemic halophyte grass, Sporobolus phleoides (Poaceae: Chloridoideae); Csiro Publishing; Australian Journal of Botany; 64; 6; 9-2016; 492-500
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