Loading content, please wait..
loading..
Logo
Version 3.20
or
Publication Type J
Authors Katembe, W. J., I. A. Ungar and J. P. Mitchell
Title Effect of salinity on germination and seedling growth of two Atriplex species (Chenopodiaceae) [Full text delivery]
Source Annals of Botany
Author Keywords triangularis willd, coastal halophytes, temperature Atriplex patula, Atriplex prostrata, cytophotometry, osmotic potential, salinity, seed germination
Abstract Salinity is one of the environmental factors that has a critical influence on the germination of halophyte seeds and plant establishment. Salinity affects imbibition, germination and root elongation. However, the way in which NaCl exerts its influence on these vital processes, whether it is through an osmotic effect or a specific ion toxicity, is still not resolved. Dimorphic seeds of the halophytes Atriplex prostrata and A. patula were treated with various iso-osmotic solutions of NaCl and polyethylene glycol (PEG). For each treatment, imbibition, germination rate, percent germination, germination recovery and nuclear area of root tip cells were compared. Higher concentrations of NaCl (-1.0 MPa) were more inhibitory to imbibition, germination and seedling root elongation than iso-osmotic PEG solutions. All seeds recovered from a pre- treatment with -2.0 MPa NaCl; and PEG solutions, except large seeds of A. prostrata which failed to germinate following transfer from - 2.0 MPa NaCl. NaCl caused a greater increase in nuclear volume than iso-osmotic PEG solutions. These data suggest that the influence of NaCl is a combination of an osmotic effect and a specific ion effect. (C) 1998 Annals of Botany Company.
Year Published 1998
Volume 82
Issue 2
Beginning Page 167-175
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. 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. 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