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Authors Al Kharusi, L; Al Yahyai, R; Yaish, MW
Author Full Name Al Kharusi, Latifa; Al Yahyai, Rashid; Yaish, Mahmoud W.
Title Antioxidant Response to Salinity in Salt-Tolerant and Salt-Susceptible Cultivars of Date Palm
Source AGRICULTURE-BASEL
Language English
Document Type Article
Author Keywords date palm; salinity; antioxidants; tolerance; antioxidation; ROS
Keywords Plus PHOENIX-DACTYLIFERA L.; INDUCED OXIDATIVE STRESS; ABIOTIC STRESS; SUPEROXIDE DISMUTASE; HYDROGEN-PEROXIDE; GAS-EXCHANGE; SUAEDA-SALSA; ASCORBATE; GLUTATHIONE; DEFENSE
Abstract The salinity tolerance mechanism in date palm through antioxidation has not been completely deciphered to date. Therefore, this study aimed to investigate the role of various antioxidants in salinity tolerance. Two date palm cultivars, contrasting in salinity tolerance, were used as model plants in a comparative study designed to detect changes in growth, Na+ and K+ uptake, reactive oxygen species (ROS), and antioxidant accumulations, when plants were exposed to salt stress. The results showed that salinity treatment had a more substantial negative effect on the growth and photosynthetic pigmentation of the susceptible 'Zabad' cultivar than on the tolerant 'Umsila' cultivar, probably due to the ability of 'Umsila' to accumulate less Na+ and more K+, to maintain a normal concentration of ROS and to produce more non-enzymatic antioxidants, including glutathione, phenolic compounds, flavonoids, and proline. Under salinity, 'Umsila' could also activate more superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX) than 'Zabad'. These results suggest that the tolerance of 'Umsila' is partially due to the balanced Na+ and K+ uptake and to the relatively high concentration of ROS-scavenging metabolites. Together, these results indicate that the antioxidant mechanism is crucial for salinity tolerance in date palms. However, other mechanisms may also be involved in this trait.
Author Address [Al Kharusi, Latifa; Yaish, Mahmoud W.] Sultan Qaboos Univ, Dept Biol, Coll Sci, POB 36, Muscat 123, Oman; [Al Yahyai, Rashid] Sultan Qaboos Univ, Dept Crop Sci, Coll Agr & Marine Sci, POB 34, Muscat 123, Oman
Reprint Address Yaish, MW (corresponding author), Sultan Qaboos Univ, Dept Biol, Coll Sci, POB 36, Muscat 123, Oman.
E-mail Address latifakharusi@gmail.com; alyahyai@squ.edu.om; myaish@squ.edu.om
ResearcherID Number Al-Yahyai, Rashid/AAD-4008-2019; Yaish, Mahmoud/F-7168-2014
ORCID Number Al-Yahyai, Rashid/0000-0001-7628-6218; Yaish, Mahmoud/0000-0002-5171-3014; Al Kharusi, Latifa/0000-0003-2317-214X
Funding Agency and Grant Number research council (TRC), Oman [151]
Funding Text This study is supported by the generous grant number 151 from the research council (TRC), Oman to M.W.Y.
Times Cited 11
Total Times Cited Count (WoS, BCI, and CSCD) 11
Publisher MDPI
Publisher City BASEL
Publisher Address ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND
29-Character Source Abbreviation AGRICULTURE-BASEL
ISO Source Abbreviation Agriculture-Basel
Publication Date JAN
Year Published 2019
Volume 9
Issue 1
Article Number 8
Digital Object Identifier (DOI) 10.3390/agriculture9010008
Page Count 17
Web of Science Category Agronomy
Subject Category Agriculture
Document Delivery Number HJ7ST
Unique Article Identifier WOS:000457398300002
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