Loading content, please wait..
loading..
Logo
Version 3.21
or
Publication Type J
Authors Zehra, A., B. Gul, R. Ansari, A. R. A. Alatar, A. K. Hegazy and M. A. Khan
Title ACTION OF PLANT GROWTH REGULATORS IN ALLEVIATING SALINITY AND TEMPERATURE EFFECTS ON THE GERMINATION OF PHRAGMITES KARKA
Source Pakistan Journal of Botany
Author Keywords dormancy relieving compounds seed-germination triglochin-maritima dimorphic seeds nitric-oxide stress salt l. fusicoccin atriplex
Abstract High salinity, high temperature and absence of light may disturb the balance in endogenous growth regulators. This may put constraint on seed germination of halophytic grasses forcing them to adopt necessary measure like going into dormancy. Germination regulating chemicals may release dormancy imposed by such factors hence effect of Thiourea (10 mM), Nitrate (20 mM), Proline (0.1 mM), Betaine (0.1 mM), GA(3) (3 mM), Kinetin (0.05 mM) and Fusicoccin (5 mu M) was studied in alleviating the inhibitory effect of a range of NaCl and temperature on seed germination of the halophytic grass Phragmites karka. Six NaCl concentrations (0, 100, 200, 300, 400 & 500 mM) were used in 12h light: 12h dark photoperiod and in complete darkness, at different temperature regimes (10/20 degrees C, 15/25 degrees C, 20/30 degrees C and 25/35 degrees C, the lower temperature corresponding to dark and the higher to light photoperiod). Highest number of seeds germinated in non-saline control and the seed germination decreased with increase in salinity at all temperature regimes. All growth regulators significantly promoted seed germination in saline and also in non-saline conditions at all thermoperiods, except at 25-35 degrees C. Only GA(3) and fusicoccin successfully alleviated salinity enforced dormancy of seeds at this thermoperiod. Growth regulators promoted germination in darkness at all temperature regimes. Rate of germination was also significantly affected by the application of these chemicals. Salt induced dormancy of P. karka seeds was broken by the application of different growth regulators. These chemicals also alleviated the temperature (GA3 and fusicoccin) and light (Nitrate) enforced dormancy from seeds of P. karka. It is concluded that germination regulating chemicals have differential effect on the seed germination of P karka. Some of them may alleviate the dormancy while others have no effect.
Author Address [Zehra, Afsheen; Gul, Bilquees; Ansari, Raziuddin; Khan, M. Ajmal] Univ Karachi, ISHU, Karachi 75270, Pakistan. [Alatar, Abdel Rehman A.; Hegazy, A. K.; Khan, M. Ajmal] King Saud Univ, Coll Sci, Dept Bot & Microbiol, Riyadh 11451, Saudi Arabia. Khan, MA (reprint author), Qatar Univ, Coll Arts & Sci, Dept Int Affairs, POB 2713, Doha, Qatar. ajmal.khan@qu.edu.qa
ISSN 0556-3321
ISBN 0556-3321
29-Character Source Abbreviation Pak. J. Bot.
Publication Date Dec
Year Published 2013
Volume 45
Issue 6
Beginning Page 1919-1924
Unique Article Identifier WOS:000330254600010
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