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Publication Type J
Authors Hameed, A., S. Gulzar, I. Aziz, T. Hussain, B. Gul and M. A. Khan
Title Effects of salinity and ascorbic acid on growth, water status and antioxidant system in a perennial halophyte
Source Aob Plants
Author Keywords Antioxidant exogenous ascorbic acid application halophyte Limonium stocksii salt tolerance reduces lipid-peroxidation oxidative stress salt tolerance foliar application ion-transport vitamin-c plants responses oxygen metabolism
Abstract Salinity causes oxidative stress in plants by enhancing production of reactive oxygen species, so that an efficient antioxidant system, of which ascorbic acid (AsA) is a key component, is an essential requirement of tolerance. However, antioxidant responses of plants to salinity vary considerably among species. Limonium stocksii is a subtropical halophyte found in the coastal marshes from Gujarat (India) to Karachi (Pakistan) but little information exists on its salt resistance. In order to investigate the role of AsA in tolerance, 2-month-old plants were treated with 0 (control), 300 (moderate) and 600 (high) mM NaCl for 30 days with or without exogenous application of AsA (20 mM) or distilled water. Shoot growth of unsprayed plants at moderate salinity was similar to that of controls while at high salinity growth was inhibited substantially. Sap osmolality, AsA concentrations and activities of AsA-dependant antioxidant enzymes increased with increasing salinity. Water spray resulted in some improvement in growth, indicating that the growth promotion by exogenous treatments could partly be attributed to water. However, exogenous application of AsA on plants grown under saline conditions improved growth and AsA dependent antioxidant enzymes more than the water control treatment. Our data show that AsA-dependent antioxidant enzymes play an important role in salinity tolerance of L. stocksii.
Author Address [Hameed, Abdul; Gulzar, Salman; Aziz, Irfan; Hussain, Tabassum; Gul, Bilquees] Univ Karachi, ISHU, Karachi 75270, Pakistan. [Khan, M. Ajmal] Qatar Univ, Coll Arts & Sci, Ctr Sustainable Dev, Doha, Qatar. Khan, MA (reprint author), Qatar Univ, Coll Arts & Sci, Ctr Sustainable Dev, POB 2713, Doha, Qatar. ajmal.khan@qu.edu.qa
ISSN 2041-2851
ISBN 2041-2851
29-Character Source Abbreviation Aob Plants
Year Published 2015
Volume 7
Digital Object Identifier (DOI) 10.1093/aobpla/plv004
Unique Article Identifier WOS:000357413900003
Plants associated with this reference

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