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Publication Type J
Authors Naz, N., T. Rafique, M. Hameed, M. Ashraf, R. Batool and S. Fatima
Title Morpho-anatomical and physiological attributes for salt tolerance in sewan grass (Lasiurus scindicus Henr.) from Cholistan Desert, Pakistan
Source Acta Physiologiae Plantarum
Abstract Three differently adapted populations of sewan grass (Lasiurus scindicus Henr.) were evaluated for structural and functional adaptations to high salinity. The habitats were Derawar Fort (DF, least saline, ECe 15.21), Bailahwala Dahar (BD, moderately saline, ECe 27.56 dS m(-1)) and Ladam Sir (LS, highly saline, ECe 39.18 dS m(-1)) from within the Cholistan Desert. The adaptive components of salt tolerance in sewan grass were assessed by determining various morpho-anatomical and physiological attributes. The degree of salt tolerance of all three ecotypes of L. scindicus from the saline habitats was compared in a controlled hydroponic system to evaluate the adaptive components that are expected to be genetically fixed during a long evolutionary process. Salinity tolerance in the most tolerant LS population relied on increased root length and total leaf area, restricted uptake of toxic Cl-, increased uptake of Ca2+, high excretion of Na+, accumulation of organic osmolytes, high water use efficiency, increased root, thicker leaf and cortical region, intensive sclerification, large metaxylem vessels, and dense pubescence on abaxial leaf surface. The BD population (from moderately saline soil) relied on high Ca2+ uptake, Na+ excretion, epidermal thickness, large cortical cells, thick endodermis and large vascular tissue. The DF population (from less saline soil) showed a significant decrease in all morphological characteristics; however, it accumulated organic osmolytes for its survival under high salinities. Structural modifications in all three populations were crucial for checking undue water loss under physiological stress that is caused by high amounts of soluble salts in the soil.
Author Address [Naz, Nargis] Islamia Univ Bahawalpur, Dept Life Sci, Bahawalpur 63100, Pakistan. [Rafique, Tanzila; Hameed, Mansoor; Fatima, Sana] Univ Agr Faisalabad, Dept Bot, Faisalabad 38040, Pakistan. [Ashraf, Muhammad] Muhammad Nawaz Shareef Univ Agr, Multan 60000, Pakistan. [Batool, Riffat] Govt Coll Women Univ, Dept Bot, Faisalabad 38040, Pakistan. Hameed, M (reprint author), Univ Agr Faisalabad, Dept Bot, Faisalabad 38040, Pakistan. hameedmansoor@yahoo.com
ISSN 0137-5881
ISBN 0137-5881
Publication Date Nov
Year Published 2014
Volume 36
Issue 11
Beginning Page 2959-2974
Digital Object Identifier (DOI) 10.1007/s11738-014-1668-8
Unique Article Identifier WOS:000343286500013
Plants associated with this reference

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