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Article

Antioxidant Response to Salinity in Salt-Tolerant and Salt-Susceptible Cultivars of Date Palm

1
Department of Biology, College of Sciences, Sultan Qaboos University, P.O. Box 36, 123 Muscat, Oman
2
Department of Crop Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, P.O. Box 34, 123 Muscat, Oman
*
Author to whom correspondence should be addressed.
Agriculture 2019, 9(1), 8; https://doi.org/10.3390/agriculture9010008
Received: 28 November 2018 / Revised: 19 December 2018 / Accepted: 22 December 2018 / Published: 2 January 2019
(This article belongs to the Special Issue Response and Tolerance of Agricultural Crops to Salinity Stress)
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. View Full-Text
Keywords: date palm; salinity; antioxidants; tolerance; antioxidation; ROS date palm; salinity; antioxidants; tolerance; antioxidation; ROS
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MDPI and ACS Style

Al Kharusi, L.; Al Yahyai, R.; Yaish, M.W. Antioxidant Response to Salinity in Salt-Tolerant and Salt-Susceptible Cultivars of Date Palm. Agriculture 2019, 9, 8. https://doi.org/10.3390/agriculture9010008

AMA Style

Al Kharusi L, Al Yahyai R, Yaish MW. Antioxidant Response to Salinity in Salt-Tolerant and Salt-Susceptible Cultivars of Date Palm. Agriculture. 2019; 9(1):8. https://doi.org/10.3390/agriculture9010008

Chicago/Turabian Style

Al Kharusi, Latifa, Rashid Al Yahyai, and Mahmoud W. Yaish 2019. "Antioxidant Response to Salinity in Salt-Tolerant and Salt-Susceptible Cultivars of Date Palm" Agriculture 9, no. 1: 8. https://doi.org/10.3390/agriculture9010008

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