Response of Non-stressed and Salt-stressed Jojoba Plants to Foliar Spray with Moringa Leaf Extract | ||||
| Damietta Journal of Agricultural Sciences | ||||
| Volume 4, Issue 3, August 2025, Page 30-44 PDF (1.16 MB) | ||||
| Document Type: Original research papers | ||||
| DOI: 10.21608/djas.2025.451546 | ||||
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| Authors | ||||
Ahmed Lotfy Wanas ; Eman Mohamed Shabka 
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| Agricultural botany Department, Faculty of Agriculture, Damietta University, Egypt | ||||
| Abstract | ||||
| Jojoba is a key oil shrub, valued for its role in combating land degradation and its oil's unique composition, which is particularly sought after in the cosmetics industry for its beneficial properties. This study investigated whether moringa leaf extract (MLE) could enhance the growth and physiological performance of jojoba plants, both under normal conditions and salt stress. The seawater salinity level and MLE concentration used were selected based on findings of two preliminary germination trials. The first trial identified 14000 ppm as the maximum salinity level tolerable by jojoba plants, while the second determined 0.5 g l⁻¹ MLE as the optimal concentration for improving germination characteristics. Results indicated that irrigating jojoba plants with 14000 ppm salinity alone caused significant reductions in root system size, stem length, number of leaves and branches, total leaf area, fresh and dry weights of roots, stems, and leaves plant⁻¹, root/shoot ratio, photosynthetic pigments, total carbohydrates, crude protein, NPK, and Mg, while proline, polyphenol, and the Na+ level increased compared to plants irrigated with tap water. On the contrary, using MLE at 0.5 g l⁻¹ as a foliar spray for unstressed jojoba plants significantly reinforced the root system size, stem length, root/shoot ratio, total dry weight, total carbohydrates, polyphenols, proline, crude protein concentrations, NPK, Ca, and Mg levels, whereas it decreased the leaf area ratio and Na⁺ compared to the control. Foliar spraying with MLE in combination with irrigation using diluted seawater (14,000 ppm) effectively mitigated the negative effects of salinity, resulting in significant improvements | ||||
| Keywords | ||||
| Jojoba; Moringa leaf extract; Salinity; Seawater; Salt stress | ||||
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