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α-Tocopherol in chloroplasts: Nothing more than an antioxidant?
- Source :
-
Current opinion in plant biology [Curr Opin Plant Biol] 2023 Aug; Vol. 74, pp. 102400. Date of Electronic Publication: 2023 Jun 11. - Publication Year :
- 2023
-
Abstract
- Among the eight forms of vitamin E, only tocopherols are essential compounds that are distributed throughout the entire plant kingdom, with α-tocopherol being the most predominant form in photosynthetic tissues. At the cellular level, α-tocopherol is of special relevance inside the chloroplast, where it eliminates singlet oxygen and modulates lipid peroxidation. This is of utmost relevance since tocopherols are the only antioxidants that counteract lipid peroxidation. Moreover, at the whole-plant level, α-tocopherol appears to modulate several physiological processes from germination to senescence. The antioxidant role of α-tocopherol at the cellular level can have profound effects at the whole-plant level, including the modulation of physiological processes that are apparently not related to redox processes and could be considered non-antioxidant functions. Here, we discuss whether non-antioxidant functions of α-tocopherol at the whole-plant level are mediated by its antioxidant role in chloroplasts and the regulation of redox processes at the cellular level.<br />Competing Interests: Declaration of competing interest All the authors declare that they have no conflict of interest.<br /> (Copyright © 2023 The Author(s). Published by Elsevier Ltd.. All rights reserved.)
- Subjects :
- Vitamin E
Tocopherols
Chloroplasts
Antioxidants
alpha-Tocopherol
Subjects
Details
- Language :
- English
- ISSN :
- 1879-0356
- Volume :
- 74
- Database :
- MEDLINE
- Journal :
- Current opinion in plant biology
- Publication Type :
- Academic Journal
- Accession number :
- 37311290
- Full Text :
- https://doi.org/10.1016/j.pbi.2023.102400