Abstract
The present investigation aims to evaluate the possible ameliorative role of iron (Fe3+) on cadmium (Cd2+)-induced oxidative stress in mung bean (Vigna radiata L.) seedlings using biochemical and computational approaches. Imposition of Cd2+ stress for a period of 7d showed substantial changes in the growth of root and shoot, and was accompanied by significant Cd2+ accumulation and alteration of biochemical parameters. Cd2+ stress resulted in a significant reduction in root and shoot length, biomass and moisture content, and increased the levels of reactive oxygen species (ROS) such as hydrogen peroxide (H2O2) and superoxide (O2·−). Furthermore, a significant increase in the rate of lipid peroxidation and degradation of antioxidant defence metabolism were observed. Supplementation of the Cd2+-stressed seedlings with Fe3+ for 7d resulted in amelioration of growth, and restoration of normal cellular homeostasis as observed by considerable changes in oxidative stress parameters as compared to Cd2+ treated seedlings alone. Besides, in absence of Fe3+, Cd2+ accumulation in both root and shoot were significantly high as compared to both control and Fe3+-supplemented seedlings. Computational (molecular docking) analysis with superoxide dismutase and catalase as target enzymes revealed that both Cd2+ and Fe3+ have got affinities for the active sites of these antioxidant enzymes. Thus, it is hereby proposed that Cd2+ may potentially interfere with the activities of these antioxidant enzymes, while Fe3+ may prevent such interactions. Our findings based on biochemical and computational analysis clearly reveals the ameliorative role of Fe3+ on Cd2+-induced alterations in growth and oxidative stress in mung bean seedlings.
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Abbreviations
- AsA:
-
Ascorbate
- BHT:
-
Butylated hydroxytoulene
- CAT:
-
Catalase
- DTNB:
-
5,5′-Dithiobis-2-nitrobenzoic acid
- EDTA:
-
Ethylenediaminetetraacetic acid
- GPX:
-
Guaiacol peroxidase
- GR:
-
Glutathione reductase
- GSH:
-
Glutathione
- GSSG:
-
Oxidised glutathione
- KSCN:
-
Potassium thiocynate
- MDA:
-
Malondialdehyde
- MVD:
-
Molegro Virtual Docker
- NADPH:
-
Nicotinamide adenine dinucleotide phosphate
- ROS:
-
Reactive oxygen species
- SOD:
-
Superoxide dismutase
- TBA:
-
Thiobarbituric acid
- TCA:
-
Trichloroacetic acid
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The authors sincerely acknowledges Assam University, Silchar for providing all necessary facilities for this study.
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SC designed, supervised the study, performed the biochemical analysis and wrote part of the manuscript. MKJ and DM conducted the computational (docking) analysis and wrote major part of the manuscript (equal contribution).
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Mazumder, M.K., Moulick, D. & Choudhury, S. Iron (Fe3+)-mediated redox responses and amelioration of oxidative stress in cadmium (Cd2+) stressed mung bean seedlings: a biochemical and computational analysis. J. Plant Biochem. Biotechnol. 31, 49–60 (2022). https://doi.org/10.1007/s13562-021-00654-4
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DOI: https://doi.org/10.1007/s13562-021-00654-4