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Publication Type J
Authors Khan, M. A., R. Ansari, B. Gul and W. Q. Li
Title Dormancy and germination responses of halophyte seeds to the application of ethylene
Source Comptes Rendus Biologies
Author Keywords Dormancy Ethephon Germination Halophyte seed Salt tolerance plant-growth regulators abscisic-acid endogenous ethylene amaranthus-caudatus saline conditions lettuce seeds water-stress salt stress root-growth arabidopsis
Abstract Ethylene is invariably produced during seed germination but its role in regulating seed dormancy and germination is poorly understood. Seeds of 22 halophytic species having different life forms - salt secreting dicots, salt secreting monocots, stem succulents and leaf succulents were germinated in Petri dishes kept in a growth chamber set at 20/30 degrees C (night/day) temperature and a 12 hr light period. Sodium chloride and ethephon were added to the medium from the beginning of the experiment. Seed germination was recorded every other day for twenty days. Application of ethylene did not have any significant effect on releasing seeds from innate dormancy. However, it appeared to have a role in alleviation of salinity effects which varied from negative in certain species to almost complete alleviation of high salinity effects in others. Our data indicates that ethylene appears to have little role in breaking innate seed dormancy however, in most halophyte seeds studied, application of ethylene alleviate the salinity effect to various degrees. Halophyte seeds which could germinate under saline conditions approaching twice the salinity of seawater may offer clues to understand management of seed germination under highly saline conditions. To cite this article: M.A. Khan et al., C R. Biologies 332 (2009). (C) 2009 Academie des sciences. Published by Elsevier Masson SAS. All fights reserved.
Author Address [Khan, M. Ajmal; Ansari, Raziuddin; Gul, Bilquees] Univ Karachi, Inst Sustainable Halophyte Utilizat, Karachi 75270, Pakistan. [Li, Weiqiang] RIKEN, Inst Phys & Chem Res, Plant Sci Ctr, Tsurumi Ku, Kanagawa 2300045, Japan. Khan, MA (reprint author), Univ Karachi, Inst Sustainable Halophyte Utilizat, Karachi 75270, Pakistan. majmalk@uok.edu.pk
ISSN 1631-0691
ISBN 1631-0691
29-Character Source Abbreviation C. R. Biol.
Publication Date Sep
Year Published 2009
Volume 332
Issue 9
Beginning Page 806-815
Digital Object Identifier (DOI) 10.1016/j.crvi.2009.05.002
Unique Article Identifier WOS:000270289900004
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