Volume 11, Issue 48 (vol. 11, no. 48 2022)
2022, 11(48): 19-34 |
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Amooaghaie R, Majidi M, Farhadian S. Impact of nano-TiO2 on salt stress tolerance of Carum copticum. Plant Process and Function 2022; 11 (48) : 2
URL: http://jispp.iut.ac.ir/article-1-1560-en.html
URL: http://jispp.iut.ac.ir/article-1-1560-en.html
1- Biology Department, Faculty of Science, Shahrekord University, Shahrekord, Iran , rayhanehamooaghaie@yahoo.com
2- Biology Department, Faculty of Science, Shahrekord University, Shahrekord, Iran
2- Biology Department, Faculty of Science, Shahrekord University, Shahrekord, Iran
Abstract: (1508 Views)
Soil and water salinity in semi-arid regions such as Iran have been important threats for plant growth and agriculture. It has been demonstrated that TiO2 nanoparticles can improve plant growth and increase stress tolerance in plants. Therefore, in this study, a pot experiment was conducted as factorial with completely randomized design to evaluate the effect of 3 levels of salinity (0, 50, 100 mg/L NaCl) and 5 levels nano- TiO2 (0, 10, 20, 40, 80 mg/L) on ajowan (Carum copticum). Results showed that with increasing salt concentration, fresh and dry weight of roots and shoots, content of chlorophyll a, b and relative water content (RWC) significantly reduced, but content of malon dialdehyde, carotenoids, proline content and the activities of SOD and APX increased in leaves. Foliar spray of nano- TiO2 concentrations influenced all the above mentioned parameters in a dose-dependent manner. Foliar spray with suitable nano- TiO2 concentrations (often 20 and 40 mg/L) improved plant growth, content of chlorophyll a, b and carotenoids, RWC, proline accumulation as well as the activities of SOD and APX whereas it reduced lipid peroxidation level. Impact of 80 mg/L nano- TiO2 on growth parameters and photosynthetic pigments contents was less than 20 and 40 mg/L and significantly increased lipid peroxidation under both normal and salinity stress conditions. In conclusion, it can said that appropriate nano-TiO2 concentrations protected ajowan against salt –induced osmotic- and oxidative stresses through increasing proline accumulation and enhancing the activities of antioxidant enzymes
Article number: 2
Type of Study: Research |
Subject:
Salt Stress
Received: 2021/07/13 | Accepted: 2021/12/18 | Published: 2022/05/23
Received: 2021/07/13 | Accepted: 2021/12/18 | Published: 2022/05/23
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