Silicon Nanoparticles More Efficiently Alleviate Arsenate Toxicity than Silicon in Maize Cultiver and Hybrid Differing in Arsenate Tolerance

By D. Tripathi, Swati Singh, Vasudha Singh, S. Prasad, D. Chauhan, N. Dubey. Frontiers in Environmental Science, 2016

266 citations recorded by the source corpus.

Though role of silicon (Si) in alleviation of various abiotic stresses is well known; however, role of silicon nanoparticles (SiNp) in mitigation of abiotic stresses is still not known. Therefore, hydroponic experiments were conducted to investigate if SiNPs are more effective than Si in mitigation of arsenate (AsV; 25 and 50 µM) toxicity in maize cultivar and hybrid differing in AsV tolerance. Under AsV stress, reduction in growth was accompanied by enhanced level of As and oxidative stress. AsV inhibited activities of antioxidant enzymes like ascorbate peroxidase, glutathione reductase and dehydroascorbate reductase (except superoxide dismutase). The redox status of ascorbate and glutathione was disturbed by AsV as indicated by a steep decline in their reduced/oxidized ratios. However, addition of Si and SiNp ameliorates AsV toxicity in maize. Si and SiNp both could reduce AsV toxicity in maize cultivar and hybrid, which could be related with decreased accumulation of As and oxidative stress, and enhanced components of the ascorbate-glutathione cycle (AsA-GSH cycle). But lowering in the accumulation of As and oxidative stress markers, and enhancement in components of the AsA-GSH cycle was prominent in SiNp fed seedlings under AsV stress. The results also showed that SiNp are more effective in reducing AsV toxicity than Si, which is due to their greater availability to seedlings. Comparing responses of cultivar and hybrid, maize cultivar shows more resistance against AsV than hybrid.

Subfields: Environmental Chemistry, Plant Science

View Paper: https://www.semanticscholar.org/paper/41b4950122c8640a67b846e21ba780106f8c50fe

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In Plant Science

1. N. Dubey
2. S. Prasad
3. Swati Singh
4. Vasudha Singh
5. D. Chauhan
6. Shivesh Sharma
7. D. Tripathi

Citations in the corpus

• Nanotechnology in Sustainable Agriculture: Recent Developments, Challenges, and Perspectives (2017, background): “The ecotoxicity of NPs is thus very important as it creates a direct link between the adverse effects of NPs and the organisms including microorganisms, plants, and other organisms including humans at various trophic levels (Rana and Kalaichelvan, 2013; Tripathi et al., 2016a).”
• An overview on manufactured nanoparticles in plants: Uptake, translocation, accumulation and phytotoxicity. (2017, background): “…341 evidence of the cellular ROS production, but how these nanomaterials interact with the cellular 342 moiety to induce ROS generation and subsequent antioxidative mechanisms is a matter of 343 conjecture (Rico et al., 2015; Tripathi et al., 2015; Tripathi et al., 2016a; Tripathi et al., 2016b,c).”
• Acquisition and Homeostasis of Iron in Higher Plants and Their Probable Role in Abiotic Stress Tolerance (2018, background): “Abiotic stresses include heat, cold, freezing, drought, salinity, flooding agents, UV, and heavy-metal stresses that have significant impacts on a plant life cycle (Macedo, 2012; Mantri et al., 2012; Singh et al., 2015, 2017; Tripathi et al., 2016c).”