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Effect of alumina (Al2O3) nanoparticles and macroparticles on Trigonella foenum-graceum L. in vitro cultures: assessment of growth parameters and oxidative stress-related responses

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Abstract

The impact of 100 μg ml−1 alumina (Al2O3) nanoparticles (NPs) on Trigonella foenum (fenugreek) in vitro cultures was studied within 3 weeks (on days 1, 7, 14, and 21) and compared with the control and bulk (macrometer-sized particles) alumina-treated groups. Transmission electron microscopy (TEM) and dynamic light scattering were used for the characterization of NPs. The results of TEM analysis represented a nearly spherical shape for the NPs with agglomeration. The zeta potential of alumina NPs was − 25.4 ± 2.5 mV and the averaged diameter was 20 ± 5 nm. Atomic absorption and inductively coupled plasma-optical emission spectroscopy provided evidence for the release and uptake of aluminum. Treatment of cultures with NPs led to an increase in the formation of lateral roots. Treatment of fenugreek with bulk alumina caused a significant decrease in the number of leaves on day 21 (p < 0.05) and the root length on days 14 and 21 compared with the control group (p < 0.05). Alumina NP has led to a significant increase in the malondialdehyde content on days 7, 14, and 21 (p < 0.001). The glutathione content was decreased significantly in NP and bulk-treated groups on days 1 and 7 (p < 0.05). FRAP assay results showed that NPs and bulk alumina led to a decrease in the antioxidant power on days 7, 14, and 21 (p < 0.001). The increased activity of catalase (p < 0.001) and ascorbate peroxidase (p < 0.001) was observed in the bulk-treated group. Lignin content had a significant increase in response to NPs on days 14 and 21 (p < 0.001). Conclusively, alumina nano/macro particles affected agronomical and physiological properties of T. foenum; however, smaller sized particles do not necessarily imply greater toxicity, while uptake of the aluminum ions should be considered seriously.

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Abbreviations

NP:

Nanoparticles

TEM:

Transmission electron microscopy

DLS:

Dynamic light scattering

MDA:

Malondialdehyde

TCA:

Trichloroacetic acid

TBA:

Thiobarbituric acid

FW:

Fresh weight

DW:

Dry weight

FRAP:

Ferric ion reducing antioxidant power

ROS:

Reactive oxygen species

PDI:

Polydispersity index

ENP:

Engineered nanoparticles

CAT:

Catalase

APX:

Ascorbate peroxidase

GSH:

Glutathione

AAS:

Atomic absorption spectroscopy

ICP-OES:

Inductive coupled plasma-optical emission spectroscopy

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Acknowledgements

Authors would like to thank Shiraz University of Medical Sciences, Shiraz, IRAN for Grant Nos. 95-01-05-12926 and 1396-01-05-14613. This work was part of the Pharm D thesis of M. Hakimzadeh and D. Mansouri. Authors would like to thank Dr. S. Abolmaali and Dr. S. Nazmara for DLS and ICP-OES analyses, respectively.

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SH has conceived and designed the experiments. RH and MH performed the experiments. HO and SH prepared the manuscript. SH has revised the manuscript. All authors proofread the manuscript.

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Correspondence to Shiva Hemmati.

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The authors declare that they have no conflict of interest.

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Dedicated to Professor Dr. Abdolali Mohagheghzadeh on the occasion of his birthday.

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Effect of alumina NPs on the UV absorbance of methanolic extract derived from fenugreek in vitro cultures within 21 days, in comparison with the bulk alumina-treated and control groups. (a) day 1, (b) day 7, (c) day 14, and (d) day 21. (TIFF 11738 kb)

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Owji, H., Hemmati, S., Heidari, R. et al. Effect of alumina (Al2O3) nanoparticles and macroparticles on Trigonella foenum-graceum L. in vitro cultures: assessment of growth parameters and oxidative stress-related responses. 3 Biotech 9, 419 (2019). https://doi.org/10.1007/s13205-019-1954-7

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  • DOI: https://doi.org/10.1007/s13205-019-1954-7

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