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Publication Type J
Authors Naz, N., S. Fatima, M. Hameed, M. Naseer, R. Batool, M. Ashraf, F. Ahmad, M. S. A. Ahmad, A. Zahoor and K. S. Ahmad
Title Adaptations for salinity tolerance in Sporobolus ioclados (Nees ex Trin.) Nees from saline desert
Source Flora
Author Keywords Ion exclusion Leaf thickness Natural populations Salinity tolerance Sclerification Trichomes salt tolerance chenopodium-quinoa stress plants halophytes responses growth accumulation germination physiology
Abstract Natural populations of a desert halophyte Sporobolus ioclados were investigated to explore morphoanatomical and physiological modifications at differently salt-affected habitats. Derawar Fort (DF) was the least affected site, Trawaywala Toba and Bailahwala Dahar (BD) were moderately saline sites and Ladam Sir (LS) and Pati Sir (PS) were highly saline sites. At root level, S. ioclados showed increased root cross-sectional area, epidermal and endodermal thicknesses, and greater proportion of cortical parenchyma as salinity level of the habitat increased. Sclerification of outer cortex was visible only at the highest saline site. Decreased stem area, epidermal cell area, cortical and vascular bundle cell area, and increased hypodermal thickness at stem level were recorded with increase in the salinity level of the habitats. At leaf level, S. ioclados showed smaller and thicker leaves, increased epidermis thickness, and well developed bulliform cells, increased mesophyll area and increased trichome density under high salinities. The plants at high salinities were better adapted in terms of growth, exclusion, internal structure, and restricted uptake of Na+ by roots, accompanied by increased concentration of K+ and Ca2+ in shoots. All these changes may be an evolutionary strategy that has been developed by the S. ioclados plants during the long process of evolution. (C) 2016 Elsevier GmbH. All rights reserved.
Author Address [Naz, Nargis] Islamia Univ Bahawalpur, Dept Life Sci, Bahawalpur, Pakistan. [Fatima, Sana; Hameed, Mansoor; Naseer, Mehwish; Ahmad, Farooq; Ahmad, Muhammad Sajid Aqeel; Zahoor, Aneela; Ahmad, Khawaja Shafique] Univ Agr Faisalabad, Dept Bot, Faisalabad, Pakistan. [Batool, Riffat] Govt Coll Women Univ, Faisalabad, Pakistan. [Ashraf, Muhammad] Pakistan Sci Fdn, Islamabad, Pakistan. Hameed, M (reprint author), Univ Agr Faisalabad, Dept Bot, Faisalabad, Pakistan. hameedmansoor@yahoo.com
ISSN 0367-2530
ISBN 0367-2530
29-Character Source Abbreviation Flora
Publication Date Aug
Year Published 2016
Volume 223
Beginning Page 46-55
Digital Object Identifier (DOI) 10.1016/j.flora.2016.04.013
Unique Article Identifier WOS:000386867900006
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