Elevated CO2 alleviates negative impacts of high temperature and salinity on phytohormones, photosynthesis, and redox reactions in leaves of Caragana korshinskii kom
Copyright © 2025 Elsevier Masson SAS. All rights reserved.
| Veröffentlicht in: | Plant physiology and biochemistry : PPB. - 1991. - 220(2025) vom: 01. März, Seite 109475 |
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| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2025
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| Zugriff auf das übergeordnete Werk: | Plant physiology and biochemistry : PPB |
| Schlagworte: | Journal Article Elevated CO(2) High temperature Photosynthesis Phytohormones Redox reaction Salinity Carbon Dioxide 142M471B3J Plant Growth Regulators mehr... |
| Zusammenfassung: | Copyright © 2025 Elsevier Masson SAS. All rights reserved. In this research, we sought to investigate how high temperature, salinity, and CO2 affect endogenous phytohormones, photosynthesis, and redox homeostasis in Caragana korshinskii Kom (C. korshinskii) leaves, as well as to comprehensively evaluate the plant's physiological response to multiple environmental stressors. The elevated temperature (e[T]), elevated Na+ (e[Na]), and elevated temperature and Na+ (e[T-Na]) treatments increased abscisic acid (ABA) and reduced zeatin-riboside (ZR), indole-3-acetic acid (IAA), and gibberellic acid (GA3). These changes induced stomatal closure, and the subsequent reduction in photosynthetic rate triggered the generation of superoxide anion (O2·-) and hydrogen peroxide (H2O2). In response, superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) activity increased, and free proline and total soluble sugars were accumulated. However, membrane lipid peroxidation was still aggravated. Under elevated CO2 (e[CO2]), the dramatic hormonal fluctuations and photosynthetic inhibition resulting from e[T], e[Na], and e[T-Na] were alleviated. Moreover, e[CO2] reduced ROS generation caused by e[T], e[Na], and e[T-Na], and stabilized antioxidant enzyme activities and non-enzymatic compound concentrations. Compared with e[T], e[Na], and e[T-Na], the increased malondialdehyde (MDA) content was effectively alleviated under elevated CO2 and temperature (e[CO2-T]), elevated CO2 and Na+ (e[CO2-Na]), and elevated CO2, temperature, and Na+ (e[CO2-T-Na]). Overall, our research suggest that e[CO2] may alleviate the negative impacts of e[T] and e[Na] on plant physiology |
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| Beschreibung: | Date Completed 30.04.2025 Date Revised 30.04.2025 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1873-2690 |
| DOI: | 10.1016/j.plaphy.2025.109475 |