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المؤلفRasool S.G.
المؤلفHameed A.
المؤلفAhmed M.Z.
المؤلفKhan M.A.
المؤلفGul B.
تاريخ الإتاحة2021-07-05T11:03:42Z
تاريخ النشر2016
اسم المنشورPakistan Journal of Botany
المصدرScopus
معرّف المصادر الموحدhttp://www.pakbs.org/pjbot/
معرّف المصادر الموحدhttp://hdl.handle.net/10576/21187
معرّف المصادر الموحدhttps://www.halophyte.org/pdfs/drkhan_pdfs/2-2016.pdf
معرّف المصادر الموحدhttps://www.halophyte.org/htmls/publications.htm
الملخصSalinity affects seed germination of halophytes by inducing ionic toxicity, osmotic constraint or both. Information about the effects of salinity on seed germination of a large number of halophytes exists, but generally little is known about the basis of salinity-induced germination inhibition. In order to partition salinity effects, we studied seed germination and recovery responses of a coastal salt marsh halophyte Halopeplis perfoliata to different isotonic treatments (?S: -0.5, -1.0, - 1.5, -2.0 and -2.5, MPa) of various salts and polythylene glycol (PEG) under two light regimes (12-h light photoperiod and 24-h complete darkness). Highest seed germination was observed in distilled water under 12-h light photoperiod and reduction in osmotic potential of the solution decreased seed germination. However, some seeds of H. perfoliata could germinate in as low as -2.5 MPa (~600 mM NaCl), which is equivalent to seawater salinity. Sea-salt treatment was more inhibitory than isotonic NaCl at the lowest osmotic potential (?S -2.5 MPa). Generally, chloride salts with lowest ?S inhibited germination more than the isotonic sulfate salts. Comparable germination responses of the seeds in NaCl and isotonic PEG treatments as well as high recovery of germination in un-germinated seeds after alleviation of NaCl salinity indicated prevalence of osmotic constraint. These results thus indicate that the seeds of H. perfoliata could tolerate high levels of a wide variety of salts found in soil. 2016, Pakistan Botanical Society. All rights reserved.
اللغةen
الناشرPakistan Botanical Society
الموضوعDormancy
Halophyte
Ionic toxicity
Osmotic potential
Salinity
Seed germination
العنوانComparison of seed germination and recovery responses of a salt marsh Halophyte halopeplis perfoliata to osmotic and ionic treatments
النوعArticle
الصفحات1335-1343
رقم العدد4
رقم المجلد48
dc.accessType Abstract Only


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