Redox homeostasis in plants under abiotic stress: role of electron carriers, energy metabolism mediators and proteinaceous thiols
By D. Kapoor, Resham Sharma, Neha Handa, H. Kaur, Amandeep Rattan, P. Yadav, Vandana Gautam, R. Kaur, R. Bhardwaj. Frontiers in Environmental Science, 2015
164 citations recorded by the source corpus.
Contemporaneous presence of both oxidized and reduced forms of electron carriers is mandatory in efficient flux by plant electron transport cascades. This requirement is considered as redox poising that involves the movement of electron from multiple sites in respiratory and photosynthetic electron transport chains to molecular oxygen. This flux triggers the formation of superoxide, consequently give rise to other reactive oxygen species (ROS) under adverse environmental conditions like drought, high or low temperature, heavy metal stress etc. that plants owing during their life span. Plant cells synthesize ascorbate, an additional hydrophilic redox buffer, which protect the plants against oxidative challenge. Large pools of antioxidants also preside over the redox homeostasis. Besides, tocopherol is a liposoluble redox buffer, which efficiently scavenges the ROS like singlet oxygen. In addition, proteinaceous thiol members such as thioredoxin, peroxiredoxin and glutaredoxin, electron carriers and energy metabolism mediators phosphorylated (NADP) and non-phosphorylated (NAD+) coenzyme forms interact with ROS, metabolize and maintain redox homeostasis.
Subfields: Molecular Biology, Plant Science
View Paper: https://www.semanticscholar.org/paper/f262c6282204a32e6a4a3f12f2366cb1a5ffc230
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Citations in the corpus
- Reactive Oxygen Species and Antioxidant Defense in Plants under Abiotic Stress: Revisiting the Crucial Role of a Universal Defense Regulator (2020, background): “However, some other nonradical ROS are also found in plants such as hypochlorous acid (HOCl), hydroperoxides (ROOH), and excited carbonyls (RO*) [32].”
- Alpha-Tocopherol-Induced Regulation of Growth and Metabolism in Plants Under Non-stress and Stress Conditions (2019, background): “Of different types of tocopherols, α-Toc is considered to be a potent antioxidant, whereas β- and γ-tocopherols have moderate potential as antioxidants and δ-tocopherol has the lowest (Kapoor et al. 2015).”
- Hydrogen peroxide priming modulates abiotic oxidative stress tolerance: insights from ROS detoxification and scavenging (2015, background): “…S-transferases (GSTs), glutathione reductase (GR), and peroxyredoxin (Prx), and non-enzymatic compounds, like ascorbate (AsA), glutathione (GSH), α-tocopherol and flavonoids, are constantly involved in regulating the concentration of ROS, including H2O2 (Miller et al., 2010; Kapoor et al., 2015).”
- Advances in Plant Tolerance to Abiotic Stresses (2016, background): “Moreover α-tocopherol has the highest anti-oxidant activity of all the tocopherol types reported in plants [80].”