Mechanisms of Date Palm Salt Tolerance Study of some Water Relationship and Histological Characteristics of Date Palm (Phoenix dactylifera L.) Seedlings under Salt Stress Condition

The effectiveness of exogenous application of calcium in ameliorating the adverse effects of salt stress (15.9 dS m-1) on date palm offshoots (Phoenix dactylifera L. cultivars of Berhi and Sayer) was investigated. Ca-fertilisers Polixal and Rexene were applied either as soil amendments or foliar spray. The results showed that Polixal at 30 ml offshoot-1 significantly increased plant height, leaf area, total chlorophyll content, RWC, proline concentration, peroxidase activity, IAA content, K+ and K+/Na+ ratio in leaves of Berhi cultivar, whereas catalase activity, ABA and Cl- content were decreased. Also Berhi cultivar responded to soil amendments more than to foliar spray. However, Ca-fertilisers mitigated salt stress in the two cultivars and Berhi cultivar was more salt stress tolerant than Sayer cultivar by maintaining the high ratio of K+/Na+ and regulating levels of IAA to ABA, in silty clay loam soil. These results suggest that calcium application can improve the defense system under salt stress conditions.

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Identification of Candidate Genes Involved in the Salt Tolerance of Date Palm (Phoenix dactylifera L.) Based on a Yeast Functional Bioassay

DNA and Cell Biology ◽

10.1089/dna.2018.4159 ◽

2018 ◽

Vol 37 (6) ◽

pp. 524-534 ◽

Cited By ~ 6

Author(s):

Himanshu V. Patankar ◽

Ibtisam Al-Harrasi ◽

Rashid Al-Yahyai ◽

Mahmoud W. Yaish

Keyword(s):

Salt Tolerance ◽

Candidate Genes ◽

Date Palm ◽

Phoenix Dactylifera ◽

Phoenix Dactylifera L

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Morphological, Biochemical, and Metabolomic Strategies of the Date Palm (Phoenix dactylifera L., cv. Deglet Nour) Roots Response to Salt Stress

Agronomy ◽

10.3390/agronomy11122389 ◽

2021 ◽

Vol 11 (12) ◽

pp. 2389

Author(s):

Safa Bouhouch ◽

Manal Eshelli ◽

Houda Ben Slama ◽

Ali Chenari Bouket ◽

Tomasz Oszako ◽

...

Keyword(s):

Salt Stress ◽

Date Palm ◽

Phoenix Dactylifera ◽

Targeted Analysis ◽

Seed Mortality ◽

Phoenix Dactylifera L ◽

Salinity Levels ◽

First Time ◽

Sod Production ◽

Mean Time

Numerous Tunisian arid and semi-arid regions are subjected to soil salinity. Thus, they are known for halophytes plants cultivation, including date palms. Phoenix dactylifera L., cv. ‘Deglet Nour’, is a valuable Tunisian cultivar subjected to high salinity levels. In this way, our purpose is to evaluate the response of its roots to long period exposition to increasing salt concentrations. We started by studying the effects of 4 g/L, 8 g/L, 12 g/L, and 16 g/L NaCl on the parameters of germination (Growth rate—GR, Seed Mortality Rate—SLM, Germination Mean Time—GMT, and Germination Speed—GS) of date palm seeds for a 2-month period. We found that 4 g/L NaCl did not affect the seeds germination, and, hereinafter, the parameters of germination and the radicle length decreased with the increase of NaCl concentrations and experiment time. Then, we demonstrated a high antioxidative enzymes CAT and SOD production in case of salt stress augmentation. Lastly, a metabolomic approach was carried out by LC-HRMS, followed by an untargeted and targeted analysis using the XCMS online and MZmine tools, respectively. The roots chemical composition was compared using PCA. We identified 25 secondary metabolites, divided into 3 categories. Metabolites known for their role in salt stress alleviation include δ-tocotrienol, metabolites identified in salt stress for the first time, and other unknown metabolites.

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