Reactive oxygen species (ROS) and response of antioxidants as ROS-scavengers during environmental stress in plants

By K. Das, A. Roychoudhury. Frontiers in Environmental Science, 2014

2,803 citations recorded by the source corpus.

Reactive oxygen species (ROS) were initially recognized as toxic by-products of aerobic metabolism. In recent years, it has become apparent that ROS plays an important signaling role in plants, controlling processes such as growth, development and especially response to biotic and abiotic environmental stimuli. The major members of the ROS family include free radicals like O2● −, OH● and non-radicals like H2O2 and 1O2. The ROS production in plants is mainly localized in the chloroplast, mitochondria and peroxisomes. There are secondary sites as well like the endoplasmic reticulum, cell membrane, cell wall and the apoplast. The role of the ROS family is that of a double edged sword; while they act as secondary messengers in various key physiological phenomena, they also induce oxidative damages under several environmental stress conditions like salinity, drought, cold, heavy metals, UV irradiation etc., when the delicate balance between ROS production and elimination, necessary for normal cellular homeostasis, is disturbed. The cellular damages are manifested in the form of degradation of biomolecules like pigments, proteins, lipids, carbohydrates and DNA, which ultimately amalgamate in plant cellular death. To ensure survival, plants have developed efficient antioxidant machinery having two arms, (i) enzymatic components like superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), guaiacol peroxidase (GPX), glutathione reductase (GR), monodehydroascorbate reductase (MDHAR) and dehydroascorbate reductase (DHAR); (ii) non-enzymatic antioxidants like ascorbic acid (AA), reduced glutathione (GSH), α-tocopherol, carotenoids, flavonoids and the osmolyte proline. These two components work hand in hand to scavenge ROS. In this review, we emphasize on the different types of ROS, their cellular production sites, their targets, and their scavenging mechanism mediated by both the branches of the antioxidant systems, highlighting the potential role of antioxidant

Subfields: Molecular Biology, Plant Science

View Paper: https://www.semanticscholar.org/paper/af0ce326f25ee7fc393ecacfcd09e13561e4933d

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Molecular Biology

1. N. Akram
2. M. A. Hossain
3. M. Ashraf
4. M. Fujita
5. Parvaiz Ahmad
6. Aditya Banerjee
7. F. Al-Qurainy
8. Kamil Kuca

In Plant Science

1. M. Fujita
2. N. Akram
3. M. Ashraf
4. M. A. Hossain
5. Parvaiz Ahmad
6. M. Hasanuzzaman
7. Kamrun Nahar
8. F. J. Corpas

Citations in the corpus

• Metabolic and molecular-genetic regulation of proline signaling and itscross-talk with major effectors mediates abiotic stress tolerance in plants (2015, background): “They contribute to the formation of tracheary elements, lignifications, and other important developmental processes (Das and Roychoudhury, 2014).”
• ROS Homeostasis and Plant Salt Tolerance: Plant Nanobiotechnology Updates (2021, background): “Generally, ROS lead to lipid peroxidation [90,91] and an increase in monodehydroascorbate (MDA) content [92].”
• Alpha-Tocopherol-Induced Regulation of Growth and Metabolism in Plants Under Non-stress and Stress Conditions (2019, background): “The first phase is prominent in stress resistant species, whereas the second degradation phase is exclusively found in stress sensitive species (Munné-Bosch 2005; Das and Roychoudhury 2014).”
• Drought and Salinity Stress Responses and Microbe-Induced Tolerance in Plants (2020, background): “Besides, drought also upregulates the biosynthesis of other antioxidant compounds, leading to the accumulation of ascorbate, glutathione, and several polyphenols (Das and Roychoudhury, 2014).”
• Elucidating the molecular mechanisms mediating plant salt-stress responses. (2018, background): “2AA +NAD Vitis vinifera,Oryza sativa Seedling Reviewed by Das & Roychoudhury (2014); Ikbal et al. (2014); Mostofa et al. (2015); Rahman et al. (2016) GR GSSG +NADPH?”
• Antioxidants and Antioxidant Enzymes in Higher Plants (2018, background): “…2002; Kumar et al. 2013a; Rastogi et al. 2014) and plays an antioxidant role in protecting lipids and other membrane constituents of chloroplasts (Das and Roychoudhury 2014), including the structure and function of photosystem II (PSII) in higher plants (Ivanov and Khorobrykh 2003) and green…”