Volume 14, Issue 69 (vol. 14, no. 69 2025)
2025, 14(69): 1-22 |
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Torabian M, Kalateh Jari S, Ghanbari Jahromi M. The effect of foliar application of sodium selenate and nano-selenium on growth traits and biochemical characteristics of Melissa officinalis under salt stress conditions. Plant Process and Function 2025; 14 (69) : 1
URL: http://jispp.iut.ac.ir/article-1-2181-en.html
URL: http://jispp.iut.ac.ir/article-1-2181-en.html
1- Department of Horticulture and Agronomy, Science and Research Branch, Islamic Azad University, Tehran, Iran
2- Department of Horticulture and Agronomy, Science and Research Branch, Islamic Azad University, Tehran, Iran ,kalatehjari@srbiau.ac.ir
2- Department of Horticulture and Agronomy, Science and Research Branch, Islamic Azad University, Tehran, Iran ,
Abstract: (34 Views)
The external application of stress modulators is often effective in reducing the effects of environmental stresses. This research was conducted as a factorial experiment in a completely randomized design with three replications to compare two different forms of selenium (sodium selenate and nano-selenium) in mitigating the adverse effects of salt stress on Melissa officinalis. The experimental treatments included three levels of salt stress (0, 4, and 8 dS/m) and five levels of foliar application (control (zero), 5 and 10 mg/L sodium selenate, and 2 and 4 mg/L nano-selenium). Based on the results, salt stress and different selenium treatments significantly affected phenylalanine ammonia-lyase (PAL) enzyme activity, malondialdehyde (MDA) concentration, relative leaf water content, proline, total phenols, total flavonoids, and essential oil yield. The highest fresh weight of the aerial parts was observed in the treatment with 10 mg/L sodium selenate and no salt stress. Salt stress significantly reduced the dry weight of the aerial parts (19.24% compared to the control), while foliar application of selenium sources (sodium selenate and nano-selenium) compensated for this reduction. Total chlorophyll decreased by 22.65% under severe salt stress compared to the control, with the highest amount obtained in the treatment with 2 mg/L nano-selenium and no salt stress. Under severe salt stress without foliar application, PAL enzyme activity decreased by 69.81%, and MDA content decreased by 39.19% compared to the control. In mild salt stress with 10 mg/L sodium selenate foliar application, total flavonoids increased by 31.30%, while under mild salt stress with 2 mg/L nano-selenium foliar application, the essential oil percentage of lemon balm increased by 31.03% compared to the control. The highest essential oil yield (12.54 g per plant) was observed in the treatment with 2 mg/L nano-selenium and no salt stress. The ratios of mineral elements (potassium, nitrogen, selenium, and chlorine) in the roots and leaves were also affected by salt stress and treatment solutions. Under severe salt stress with 10 mg/L sodium selenate, the root-to-leaf potassium ratio (1.25) and root-to-leaf nitrogen ratio (1.63) were higher than in other treatments. In severe salt stress without foliar application, the root-to-leaf selenium ratio was 0.393, indicating greater selenium accumulation in the leaves. Overall, it can be concluded that nano-selenium was more effective than sodium selenate in alleviating the negative effects of salt stress on the medicinal plant lemon balm.
Article number: 1
Type of Study: Applicable |
Subject:
Salt Stress
Received: 2025/02/16 | Accepted: 2025/05/6 | Published: 2025/12/16
Received: 2025/02/16 | Accepted: 2025/05/6 | Published: 2025/12/16
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