Salicylic Acid Improves the Salt Tolerance Capacity of <i>Saponaria officinalis</i> by Modulating Its Photosynthetic Rate, Osmoprotectants, Antioxidant Levels, and Ion Homeostasis
Salicylic acid (SA) plays an important role in regulating salt stress tolerance in plants. However, there are no studies on the effect of exogenous SA on <i>Saponaria officinalis</i> under salt stress. To study the effectiveness of SA on mitigating salt stress, <i>S. officinalis<...
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| Format: | Article |
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MDPI AG
2022-06-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/12/6/1443 |
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| author | Lingxin Xu Hong Chen Tingting Zhang Yanan Deng Junxin Yan Lei Wang |
| author_facet | Lingxin Xu Hong Chen Tingting Zhang Yanan Deng Junxin Yan Lei Wang |
| author_sort | Lingxin Xu |
| collection | DOAJ |
| description | Salicylic acid (SA) plays an important role in regulating salt stress tolerance in plants. However, there are no studies on the effect of exogenous SA on <i>Saponaria officinalis</i> under salt stress. To study the effectiveness of SA on mitigating salt stress, <i>S. officinalis</i> were used in a pot experiment of salt stress simulated with an NaCl solution (100, 200, and 300 mmol L<sup>−1</sup>), while an SA solution (0, 0.2, 0.4, 0.6, 0.8, 1.0 mmol L<sup>−1</sup>) was sprayed on leaves. Under salt stress, spraying SA caused an increase in the salt damage index, electrolyte leakage, and a reduction in malondialdehyde and Na<sup>+</sup> content, but an increase in the rate of photosynthesis, chlorophyll, soluble sugar, soluble protein, free proline, K<sup>+</sup>, Mg<sup>2+</sup>, Ca<sup>2+</sup> content, the K<sup>+</sup>/Na<sup>+</sup> ratio, superoxide dismutase, peroxidase, catalase, ascorbate peroxidase activity, and the comprehensive score. The results show that SA improves the salt tolerance capacity of <i>S. officinalis</i> by modulating its photosynthetic rate, osmoprotectants, antioxidant levels, and ion homeostasis. However, the effectiveness of SA was not linearly related to its concentration. In summary, our findings reveal the protective roles of SA against salinity in <i>S. officinalis</i> and suggest that the use of 0.6 mmol L<sup>−1</sup> of SA in salt stress conditions could be an effective approach to reduce the damage caused by saline soil in <i>S. officinalis</i>. |
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| language | English |
| last_indexed | 2024-03-10T00:38:35Z |
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| series | Agronomy |
| spelling | doaj.art-ab49c771a2924705a70b63adaf9305db2023-11-23T15:11:53ZengMDPI AGAgronomy2073-43952022-06-01126144310.3390/agronomy12061443Salicylic Acid Improves the Salt Tolerance Capacity of <i>Saponaria officinalis</i> by Modulating Its Photosynthetic Rate, Osmoprotectants, Antioxidant Levels, and Ion HomeostasisLingxin Xu0Hong Chen1Tingting Zhang2Yanan Deng3Junxin Yan4Lei Wang5College of Landscape Architecture, Northeast Forestry University, Harbin 150040, ChinaCollege of Landscape Architecture, Northeast Forestry University, Harbin 150040, ChinaCollege of Landscape Architecture, Northeast Forestry University, Harbin 150040, ChinaCollege of Landscape Architecture, Northeast Forestry University, Harbin 150040, ChinaCollege of Landscape Architecture, Northeast Forestry University, Harbin 150040, ChinaCollege of Landscape Architecture, Northeast Forestry University, Harbin 150040, ChinaSalicylic acid (SA) plays an important role in regulating salt stress tolerance in plants. However, there are no studies on the effect of exogenous SA on <i>Saponaria officinalis</i> under salt stress. To study the effectiveness of SA on mitigating salt stress, <i>S. officinalis</i> were used in a pot experiment of salt stress simulated with an NaCl solution (100, 200, and 300 mmol L<sup>−1</sup>), while an SA solution (0, 0.2, 0.4, 0.6, 0.8, 1.0 mmol L<sup>−1</sup>) was sprayed on leaves. Under salt stress, spraying SA caused an increase in the salt damage index, electrolyte leakage, and a reduction in malondialdehyde and Na<sup>+</sup> content, but an increase in the rate of photosynthesis, chlorophyll, soluble sugar, soluble protein, free proline, K<sup>+</sup>, Mg<sup>2+</sup>, Ca<sup>2+</sup> content, the K<sup>+</sup>/Na<sup>+</sup> ratio, superoxide dismutase, peroxidase, catalase, ascorbate peroxidase activity, and the comprehensive score. The results show that SA improves the salt tolerance capacity of <i>S. officinalis</i> by modulating its photosynthetic rate, osmoprotectants, antioxidant levels, and ion homeostasis. However, the effectiveness of SA was not linearly related to its concentration. In summary, our findings reveal the protective roles of SA against salinity in <i>S. officinalis</i> and suggest that the use of 0.6 mmol L<sup>−1</sup> of SA in salt stress conditions could be an effective approach to reduce the damage caused by saline soil in <i>S. officinalis</i>.https://www.mdpi.com/2073-4395/12/6/1443antioxidasefactor analysision homeostasisosmoregulatory substancesalicylic acidsalt stress |
| spellingShingle | Lingxin Xu Hong Chen Tingting Zhang Yanan Deng Junxin Yan Lei Wang Salicylic Acid Improves the Salt Tolerance Capacity of <i>Saponaria officinalis</i> by Modulating Its Photosynthetic Rate, Osmoprotectants, Antioxidant Levels, and Ion Homeostasis Agronomy antioxidase factor analysis ion homeostasis osmoregulatory substance salicylic acid salt stress |
| title | Salicylic Acid Improves the Salt Tolerance Capacity of <i>Saponaria officinalis</i> by Modulating Its Photosynthetic Rate, Osmoprotectants, Antioxidant Levels, and Ion Homeostasis |
| title_full | Salicylic Acid Improves the Salt Tolerance Capacity of <i>Saponaria officinalis</i> by Modulating Its Photosynthetic Rate, Osmoprotectants, Antioxidant Levels, and Ion Homeostasis |
| title_fullStr | Salicylic Acid Improves the Salt Tolerance Capacity of <i>Saponaria officinalis</i> by Modulating Its Photosynthetic Rate, Osmoprotectants, Antioxidant Levels, and Ion Homeostasis |
| title_full_unstemmed | Salicylic Acid Improves the Salt Tolerance Capacity of <i>Saponaria officinalis</i> by Modulating Its Photosynthetic Rate, Osmoprotectants, Antioxidant Levels, and Ion Homeostasis |
| title_short | Salicylic Acid Improves the Salt Tolerance Capacity of <i>Saponaria officinalis</i> by Modulating Its Photosynthetic Rate, Osmoprotectants, Antioxidant Levels, and Ion Homeostasis |
| title_sort | salicylic acid improves the salt tolerance capacity of i saponaria officinalis i by modulating its photosynthetic rate osmoprotectants antioxidant levels and ion homeostasis |
| topic | antioxidase factor analysis ion homeostasis osmoregulatory substance salicylic acid salt stress |
| url | https://www.mdpi.com/2073-4395/12/6/1443 |
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