Synergistic effect of indole‒3‒acetic acid and nitrogen on yield, sugar profile, and nitrogen utilization of salt-stressed sugar beet crop
Abstract Purpose Salt stress often reduces plant efficiency in nutrient utilization, particularly nitrogen (N), leading to physiological disorders, primarily those related to phytohormones. Hence, the current study assessed the combined effect of indole-3-acetic acid (IAA) and N in inducing salt str...
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2025-05-01
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| Series: | BMC Plant Biology |
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| Online Access: | https://doi.org/10.1186/s12870-025-06531-9 |
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| author | Ahmed Shaaban Hani S. Saudy Mohamed A. M. Eid Sammar F. Zahran Ali A. A. Mekdad |
| author_facet | Ahmed Shaaban Hani S. Saudy Mohamed A. M. Eid Sammar F. Zahran Ali A. A. Mekdad |
| author_sort | Ahmed Shaaban |
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| description | Abstract Purpose Salt stress often reduces plant efficiency in nutrient utilization, particularly nitrogen (N), leading to physiological disorders, primarily those related to phytohormones. Hence, the current study assessed the combined effect of indole-3-acetic acid (IAA) and N in inducing salt stress tolerance in sugar beet. Methods Using a split-plot in randomized complete block design replicated thrice, the effect of three IAA levels (0, 150, and 300 mg L− 1, denoted IAA0, IAA150 and IAA300, respectively) and three N fertilization rates (240, 290, and 340 kg N ha− 1, abbreviated as N240, N290 and N340, respectively) on sugar beet’s growth, nutritional status, and quality and sugar quality in saline soil was explored. Results Findings exhibited that IAA300 × N340 was the best combination for enhancing root diameter, leaf fresh weight, and leaf area index. Ionic homeostasis, expressed as the leaf K⁺/Na⁺ and Ca²⁺/Na⁺ ratios, reached its highest values with N340 (1.21 and 0.51, respectively), exceeding those observed with N240 and N290. The IAA0 or IAA150 × N340 gave the highest juice sodium content (34.0 and 33.8 mmol kg⁻¹, respectively), while N240 across all IAA treatments recorded the lowest ones. The IAA300 × N340 was the most effective practice for enhancing yields and N use efficiency in sugar beet, resulting in the highest root yield (97.6 t ha⁻¹), pure sugar yield (14.50 t ha⁻¹), and N use efficiency (0.342 kg root kg⁻¹ N), significantly outperforming other IAA × N interactions. Conclusion In conclusion, progressive increases in IAA and N caused the enhancements sugar beet growth, yield, and related quality, since IAA at 300 mg L− 1 plus N at 340 kg N ha− 1 had the favorable synergism in this respect. |
| format | Article |
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| institution | OA Journals |
| issn | 1471-2229 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | BMC |
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| series | BMC Plant Biology |
| spelling | doaj-art-de7dfec0eb2548c2ba8faa04a4d08d052025-08-20T01:51:38ZengBMCBMC Plant Biology1471-22292025-05-0125111310.1186/s12870-025-06531-9Synergistic effect of indole‒3‒acetic acid and nitrogen on yield, sugar profile, and nitrogen utilization of salt-stressed sugar beet cropAhmed Shaaban0Hani S. Saudy1Mohamed A. M. Eid2Sammar F. Zahran3Ali A. A. Mekdad4Agronomy Department, Faculty of Agriculture, Fayoum UniversityAgronomy Department, Faculty of Agriculture, Ain Shams UniversityAgronomy Department, Faculty of Agriculture, Fayoum UniversitySoil, Water and Environment Research Institute, Agricultural Research CenterAgronomy Department, Faculty of Agriculture, Fayoum UniversityAbstract Purpose Salt stress often reduces plant efficiency in nutrient utilization, particularly nitrogen (N), leading to physiological disorders, primarily those related to phytohormones. Hence, the current study assessed the combined effect of indole-3-acetic acid (IAA) and N in inducing salt stress tolerance in sugar beet. Methods Using a split-plot in randomized complete block design replicated thrice, the effect of three IAA levels (0, 150, and 300 mg L− 1, denoted IAA0, IAA150 and IAA300, respectively) and three N fertilization rates (240, 290, and 340 kg N ha− 1, abbreviated as N240, N290 and N340, respectively) on sugar beet’s growth, nutritional status, and quality and sugar quality in saline soil was explored. Results Findings exhibited that IAA300 × N340 was the best combination for enhancing root diameter, leaf fresh weight, and leaf area index. Ionic homeostasis, expressed as the leaf K⁺/Na⁺ and Ca²⁺/Na⁺ ratios, reached its highest values with N340 (1.21 and 0.51, respectively), exceeding those observed with N240 and N290. The IAA0 or IAA150 × N340 gave the highest juice sodium content (34.0 and 33.8 mmol kg⁻¹, respectively), while N240 across all IAA treatments recorded the lowest ones. The IAA300 × N340 was the most effective practice for enhancing yields and N use efficiency in sugar beet, resulting in the highest root yield (97.6 t ha⁻¹), pure sugar yield (14.50 t ha⁻¹), and N use efficiency (0.342 kg root kg⁻¹ N), significantly outperforming other IAA × N interactions. Conclusion In conclusion, progressive increases in IAA and N caused the enhancements sugar beet growth, yield, and related quality, since IAA at 300 mg L− 1 plus N at 340 kg N ha− 1 had the favorable synergism in this respect.https://doi.org/10.1186/s12870-025-06531-9AuxinNitrogen supplyNon-sucrose impuritiesNutrient contentSalt stressSugar beet productivity |
| spellingShingle | Ahmed Shaaban Hani S. Saudy Mohamed A. M. Eid Sammar F. Zahran Ali A. A. Mekdad Synergistic effect of indole‒3‒acetic acid and nitrogen on yield, sugar profile, and nitrogen utilization of salt-stressed sugar beet crop BMC Plant Biology Auxin Nitrogen supply Non-sucrose impurities Nutrient content Salt stress Sugar beet productivity |
| title | Synergistic effect of indole‒3‒acetic acid and nitrogen on yield, sugar profile, and nitrogen utilization of salt-stressed sugar beet crop |
| title_full | Synergistic effect of indole‒3‒acetic acid and nitrogen on yield, sugar profile, and nitrogen utilization of salt-stressed sugar beet crop |
| title_fullStr | Synergistic effect of indole‒3‒acetic acid and nitrogen on yield, sugar profile, and nitrogen utilization of salt-stressed sugar beet crop |
| title_full_unstemmed | Synergistic effect of indole‒3‒acetic acid and nitrogen on yield, sugar profile, and nitrogen utilization of salt-stressed sugar beet crop |
| title_short | Synergistic effect of indole‒3‒acetic acid and nitrogen on yield, sugar profile, and nitrogen utilization of salt-stressed sugar beet crop |
| title_sort | synergistic effect of indole 3 acetic acid and nitrogen on yield sugar profile and nitrogen utilization of salt stressed sugar beet crop |
| topic | Auxin Nitrogen supply Non-sucrose impurities Nutrient content Salt stress Sugar beet productivity |
| url | https://doi.org/10.1186/s12870-025-06531-9 |
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