The impact of Ca2+ on the protective mechanisms of the photosystem under drought stress
External calcium ions (Ca2+) play a crucial role in mitigating drought stress in plants, as revealed through physiological and transcriptomic analyses using tobacco (Nicotiana tabacum L) as a model system. Under drought stress, leaves wilted, chlorophyll content decreased. The maximum photochemical...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2025-12-01
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| Series: | Journal of Plant Interactions |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/17429145.2025.2458083 |
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| _version_ | 1832542922658021376 |
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| author | Yanli Wei Tongen Zhang Tongtong Yao Zihan Wang Yanhui Che Huihui Zhang |
| author_facet | Yanli Wei Tongen Zhang Tongtong Yao Zihan Wang Yanhui Che Huihui Zhang |
| author_sort | Yanli Wei |
| collection | DOAJ |
| description | External calcium ions (Ca2+) play a crucial role in mitigating drought stress in plants, as revealed through physiological and transcriptomic analyses using tobacco (Nicotiana tabacum L) as a model system. Under drought stress, leaves wilted, chlorophyll content decreased. The maximum photochemical efficiency of PSII (Fv/Fm) and the photosynthetic performance index decreased, fluorescence intensities at the K and L points increased, Y(NPQ) increased, net photosynthetic rate (Pn) decreased, and PSI activity (ΔI/Io) was reduced. Upon application of external calcium under drought conditions, leaf wilting was reduced, chlorophyll content increased, Fv/Fm, PIabs, and PItotal improved, fluorescence intensities at the K and L points as well as Y(NPQ) decreased, cyclic electron transport and Pn were enhanced, stomatal aperture increased, and ΔI/Io improved. Transcriptomic analysis revealed a significant reduction in the expression of genes related to the PSI and PSII reaction centers, ATP synthesis, electron transport, and antenna proteins under drought stress. The application of calcium significantly alleviated the drought-induced downregulation of these genes. In summary, Ca2+ reduces water loss in plants, increases chlorophyll content in leaves, restores PSII reaction center activity, ensures efficient photosynthetic electron transport, maintains thylakoid membrane stability, enhances cyclic electron transport, and reduces damage to the photosystem. |
| format | Article |
| id | doaj-art-d0f9f7843ff34bada5b641eb0e3c2ca8 |
| institution | Kabale University |
| issn | 1742-9145 1742-9153 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Plant Interactions |
| spelling | doaj-art-d0f9f7843ff34bada5b641eb0e3c2ca82025-02-03T12:12:37ZengTaylor & Francis GroupJournal of Plant Interactions1742-91451742-91532025-12-0120110.1080/17429145.2025.2458083The impact of Ca2+ on the protective mechanisms of the photosystem under drought stressYanli Wei0Tongen Zhang1Tongtong Yao2Zihan Wang3Yanhui Che4Huihui Zhang5Institute of Biological Engineering, Xinxiang Institute of Engineering, Xinxiang, People’s Republic of ChinaInstitute of Biological Engineering, Xinxiang Institute of Engineering, Xinxiang, People’s Republic of ChinaCollege of Life Sciences, Northeast Forestry University, Harbin, People’s Republic of ChinaCollege of Life Sciences, Northeast Forestry University, Harbin, People’s Republic of ChinaEngineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Molecular Biology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin, People’s Republic of ChinaCollege of Life Sciences, Northeast Forestry University, Harbin, People’s Republic of ChinaExternal calcium ions (Ca2+) play a crucial role in mitigating drought stress in plants, as revealed through physiological and transcriptomic analyses using tobacco (Nicotiana tabacum L) as a model system. Under drought stress, leaves wilted, chlorophyll content decreased. The maximum photochemical efficiency of PSII (Fv/Fm) and the photosynthetic performance index decreased, fluorescence intensities at the K and L points increased, Y(NPQ) increased, net photosynthetic rate (Pn) decreased, and PSI activity (ΔI/Io) was reduced. Upon application of external calcium under drought conditions, leaf wilting was reduced, chlorophyll content increased, Fv/Fm, PIabs, and PItotal improved, fluorescence intensities at the K and L points as well as Y(NPQ) decreased, cyclic electron transport and Pn were enhanced, stomatal aperture increased, and ΔI/Io improved. Transcriptomic analysis revealed a significant reduction in the expression of genes related to the PSI and PSII reaction centers, ATP synthesis, electron transport, and antenna proteins under drought stress. The application of calcium significantly alleviated the drought-induced downregulation of these genes. In summary, Ca2+ reduces water loss in plants, increases chlorophyll content in leaves, restores PSII reaction center activity, ensures efficient photosynthetic electron transport, maintains thylakoid membrane stability, enhances cyclic electron transport, and reduces damage to the photosystem.https://www.tandfonline.com/doi/10.1080/17429145.2025.2458083Drought stresstobaccoCa2+photosynthesisCEF |
| spellingShingle | Yanli Wei Tongen Zhang Tongtong Yao Zihan Wang Yanhui Che Huihui Zhang The impact of Ca2+ on the protective mechanisms of the photosystem under drought stress Journal of Plant Interactions Drought stress tobacco Ca2+ photosynthesis CEF |
| title | The impact of Ca2+ on the protective mechanisms of the photosystem under drought stress |
| title_full | The impact of Ca2+ on the protective mechanisms of the photosystem under drought stress |
| title_fullStr | The impact of Ca2+ on the protective mechanisms of the photosystem under drought stress |
| title_full_unstemmed | The impact of Ca2+ on the protective mechanisms of the photosystem under drought stress |
| title_short | The impact of Ca2+ on the protective mechanisms of the photosystem under drought stress |
| title_sort | impact of ca2 on the protective mechanisms of the photosystem under drought stress |
| topic | Drought stress tobacco Ca2+ photosynthesis CEF |
| url | https://www.tandfonline.com/doi/10.1080/17429145.2025.2458083 |
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