Volume 14, Issue 68 (vol. 14, no. 68 2025)
2025, 14(68): 227-249 |
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Salimi F, Abdollahi F, Yavari A. Physiological, biochemical responses and changes in leaf element of lemongrass (Cymbopogon citratus) to some elicitors under salt stress conditions. Plant Process and Function 2025; 14 (68) : 14
URL: http://jispp.iut.ac.ir/article-1-2200-en.html
URL: http://jispp.iut.ac.ir/article-1-2200-en.html
1- Department of Horticulture Science, University of Hormozgan, Bandar Abbas, Iran
2- Department of Horticulture Science, University of Hormozgan, Bandar Abbas, Iran ,fabdollahi@hormozgan.ac.ir
2- Department of Horticulture Science, University of Hormozgan, Bandar Abbas, Iran ,
Abstract: (163 Views)
Recently, applying biological and hormonal elicitors, including chitosan and abscisic acid (ABA), has been recommended to mitigate the harmful effects of environmental stresses, such as salinity stress, in various plants. For this purpose, this study was conducted as a factorial experiment with two factors: salinity (0, 50, and 100 mM) and different levels of elicitor application (0, 50 mg/L chitosan, 100 mg/L chitosan, 10 mg/L ABA, and 5 mg/L ABA) in a completely randomized design with three replicates in the University of Hormozgan on lemongrass under salinity stress. The present study showed that salinity harmed lemongrass vegetative and physiological traits and the ionic composition. A salinity level of 100 mM significantly reduced the shoot dry weight, total dry weight, and leaf area by 20.71%, 12.40%, and 27.76%, respectively, and increased Na+ content in leaves by 37.60% compared to the control without spraying. Under 100 mM salinity conditions, the application of 100 mg/L chitosan significantly increased the shoot fresh weight of aerial parts, chlorophyll a, chlorophyll b, total chlorophyll, and carotenoids by 20.86%, 229.5%, 105.3%, 206.8%, and 196.2%, respectively. The application of 10 mg/L ABA resulted in a significant increase in the total fresh weight and the number of tillers by 22.9% and 85.0%, respectively, compared to the control. Salt stress increases hydrogen peroxide production, which leads to enhanced membrane lipid peroxidation and consequently higher malondialdehyde (MDA) levels. Meanwhile, elicitors limited lipid peroxidation and MDA production by boosting antioxidant capacity. Among these, chitosan at 100 mg/L and ABA at 10 mg/L were the most effective. The results indicated that the application of elicitors increased relative water content, enhanced the K+ to Na+ ratio, and reduced ionic leakage under salinity stress conditions. Therefore, using biological elicitors, especially 100 mg/L chitosan, increased adaptation of lemongrass to salinity stress, which could be considered a strategy for the growth improvement of this plant in saline areas of Iran.
Article number: 14
Type of Study: Research |
Subject:
Salt Stress
Received: 2025/04/13 | Accepted: 2025/06/10 | Published: 2025/10/29
Received: 2025/04/13 | Accepted: 2025/06/10 | Published: 2025/10/29
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