Loading content, please wait..
loading..
Logo
Version 3.22
or
Publication Type J
Authors Richard, G. A., M. C. Cerino, J. F. Pensiero and J. M. Zabala
Title Seed dormancy and germination in different populations of the Argentinan endemic halophyte grass, Sporobolus phleoides (Poaceae: Chloridoideae)
Source Australian Journal of Botany
Author Keywords cold stratification nitrates after-ripening non-deep physiological dormancy seed coat warm-season perennial grasses temperature mechanisms salinity environment emergence caryopsis dropseed moisture
Abstract 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 degrees 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.
Author Address [Alicia Richard, Geraldina; Carolina Cerino, Maria; Francisco Pensiero, Jose] Univ Nacl Litoral, Fac Ciencias Agr, Catedra Bot Sistemat Agron, 86 Kreder 2805,3080HOF, Esperanza, Argentina. [Marcelo Zabala, Juan] Univ Nacl Litoral, Fac Ciencias Agr, Catedra Genet & Mejoramiento Vegetal & Anim, 86 Kreder 2805,3080HOF, Esperanza, Argentina. [Alicia Richard, Geraldina; Carolina Cerino, Maria; Francisco Pensiero, Jose] Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, Argentina. Richard, GA (reprint author), Univ Nacl Litoral, Fac Ciencias Agr, Catedra Bot Sistemat Agron, 86 Kreder 2805,3080HOF, Esperanza, Argentina.; Richard, GA (reprint author), Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, Argentina. grichard@santafe-conicet.gov.ar
ISSN 0067-1924
ISBN 0067-1924
Year Published 2016
Volume 64
Issue 6
Beginning Page 492-500
Digital Object Identifier (DOI) 10.1071/bt15285
Unique Article Identifier WOS:000384673500004
Plants associated with this reference

LEGAL NOTICES — This website is protected by Copyright © The University of Sussex, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021. The eHALOPH database is protected by Database Right and Copyright © The University of Sussex and other contributors, 2006, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021. This database is based on an earlier work by James Aronson.
THIS WEBSITE AND THIS DATABASE ARE PROVIDED ON AN "AS IS" BASIS, AND YOU USE THEM AND RELY ON THEM AT YOUR OWN RISK.

Contact email: halophytes@sussex.ac.uk
Credits – Tim Flowers, Joaquim Santos, Moritz Jahns, Brian Warburton, Peter Reed