Comparative Water Relations of Two Contrasting Date Palm Genotypes under Salinity
Salinity is a global agricultural problem, resulting in a significant reduction in the plantation areas and the crop yields, especially in arid and semiarid regions. The date palm is relatively salt-tolerant plant species, although the nature of salt tolerance is poorly understood. In this study, th...
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Online Access: | http://dx.doi.org/10.1155/2019/4262013 |
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doaj-5400c7653c014f4a94819962afd106822020-11-25T02:19:34ZengHindawi LimitedInternational Journal of Agronomy1687-81591687-81672019-01-01201910.1155/2019/42620134262013Comparative Water Relations of Two Contrasting Date Palm Genotypes under SalinityLatifa Al Kharusi0Ramanjulu Sunkar1Rashid Al-Yahyai2Mahmoud W. Yaish3Department of Biology, College of Science, Sultan Qaboos University, P.O. Box 36, 123 Muscat, OmanDepartment of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, Oklahoma, USADepartment of Crop Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, P.O. Box 34, 123 Muscat, OmanDepartment of Biology, College of Science, Sultan Qaboos University, P.O. Box 36, 123 Muscat, OmanSalinity is a global agricultural problem, resulting in a significant reduction in the plantation areas and the crop yields, especially in arid and semiarid regions. The date palm is relatively salt-tolerant plant species, although the nature of salt tolerance is poorly understood. In this study, the salt stress responses of a salt-tolerant “Umsila” was compared with salt-susceptible “Zabad” date palm cultivars. Various physiological parameters, plant-water relations, and anatomical characteristics were analyzed. The results revealed that although salinity has negatively affected both cultivars, Umsila exhibited more stable photosynthesis than Zabad as reflected by the quantum yield (Qy) and the stomatal conductance (GS). Similarly, Umsila showed a more dynamic root system and efficient water relations than Zabad as demonstrated by the leaf water potential (LWP) and relative water content (RWC) during salinity. Umsila also accumulated greater abundances of soluble sugars, potassium (K+), calcium (Ca+2), proline, glycine betaine, and lignin and formed extra layers of Casparian strips in the root tissues when the seedlings were grown under saline conditions. Together, the results obtained from this study have offered some insights into the salt tolerance mechanisms in the date palm.http://dx.doi.org/10.1155/2019/4262013 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Latifa Al Kharusi Ramanjulu Sunkar Rashid Al-Yahyai Mahmoud W. Yaish |
spellingShingle |
Latifa Al Kharusi Ramanjulu Sunkar Rashid Al-Yahyai Mahmoud W. Yaish Comparative Water Relations of Two Contrasting Date Palm Genotypes under Salinity International Journal of Agronomy |
author_facet |
Latifa Al Kharusi Ramanjulu Sunkar Rashid Al-Yahyai Mahmoud W. Yaish |
author_sort |
Latifa Al Kharusi |
title |
Comparative Water Relations of Two Contrasting Date Palm Genotypes under Salinity |
title_short |
Comparative Water Relations of Two Contrasting Date Palm Genotypes under Salinity |
title_full |
Comparative Water Relations of Two Contrasting Date Palm Genotypes under Salinity |
title_fullStr |
Comparative Water Relations of Two Contrasting Date Palm Genotypes under Salinity |
title_full_unstemmed |
Comparative Water Relations of Two Contrasting Date Palm Genotypes under Salinity |
title_sort |
comparative water relations of two contrasting date palm genotypes under salinity |
publisher |
Hindawi Limited |
series |
International Journal of Agronomy |
issn |
1687-8159 1687-8167 |
publishDate |
2019-01-01 |
description |
Salinity is a global agricultural problem, resulting in a significant reduction in the plantation areas and the crop yields, especially in arid and semiarid regions. The date palm is relatively salt-tolerant plant species, although the nature of salt tolerance is poorly understood. In this study, the salt stress responses of a salt-tolerant “Umsila” was compared with salt-susceptible “Zabad” date palm cultivars. Various physiological parameters, plant-water relations, and anatomical characteristics were analyzed. The results revealed that although salinity has negatively affected both cultivars, Umsila exhibited more stable photosynthesis than Zabad as reflected by the quantum yield (Qy) and the stomatal conductance (GS). Similarly, Umsila showed a more dynamic root system and efficient water relations than Zabad as demonstrated by the leaf water potential (LWP) and relative water content (RWC) during salinity. Umsila also accumulated greater abundances of soluble sugars, potassium (K+), calcium (Ca+2), proline, glycine betaine, and lignin and formed extra layers of Casparian strips in the root tissues when the seedlings were grown under saline conditions. Together, the results obtained from this study have offered some insights into the salt tolerance mechanisms in the date palm. |
url |
http://dx.doi.org/10.1155/2019/4262013 |
work_keys_str_mv |
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