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

Author

Listed:
  • Latifa Al Kharusi

    (Department of Biology, College of Sciences, Sultan Qaboos University, P.O. Box 36, 123 Muscat, Oman)

  • Rashid Al Yahyai

    (Department of Crop Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, P.O. Box 34, 123 Muscat, Oman)

  • Mahmoud W. Yaish

    (Department of Biology, College of Sciences, Sultan Qaboos University, P.O. Box 36, 123 Muscat, Oman)

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.

Suggested Citation

  • Latifa Al Kharusi & Rashid Al Yahyai & Mahmoud W. Yaish, 2019. "Antioxidant Response to Salinity in Salt-Tolerant and Salt-Susceptible Cultivars of Date Palm," Agriculture, MDPI, vol. 9(1), pages 1-17, January.
    • Handle: RePEc:gam:jagris:v:9:y:2019:i:1:p:8-:d:194479
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    References listed on IDEAS

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    1. Flowers, T.J. & Flowers, S.A., 2005. "Why does salinity pose such a difficult problem for plant breeders?," Agricultural Water Management, Elsevier, vol. 78(1-2), pages 15-24, September.
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    Cited by:

    1. Fatima-Zahra Akensous & Mohamed Anli & Abdelilah Meddich, 2022. "Biostimulants as Innovative Tools to Boost Date Palm ( Phoenix dactylifera L.) Performance under Drought, Salinity, and Heavy Metal(Oid)s’ Stresses: A Concise Review," Sustainability, MDPI, vol. 14(23), pages 1-30, November.
    2. Wang, Wangtian & Ma, Li & Wu, Junyan & Sun, Wancang & Ali, Shahzad & Yang, Gang & Pu, Yuanyuan & Liu, Lijun & Fang, Yan, 2023. "Cultivation practices with various mulching materials to regulate chlorophyll fluorescence, cuticular wax, and rapeseed productivity under semi-arid regions," Agricultural Water Management, Elsevier, vol. 288(C).

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