Green magnesium oxide nanoparticles-based modulation of cellular oxidative repair mechanisms to reduce arsenic uptake and translocation in rice (Oryza sativa L.) plants

Temoor Ahmed; Muhammad Noman; Natasha Manzoor; Muhammad Shahid; Khalid Mahmud Hussaini; Muhammad Rizwan; Shafaqat Ali; Awais Maqsood; Bin Li

doi:10.1016/j.envpol.2021.117785

Green magnesium oxide nanoparticles-based modulation of cellular oxidative repair mechanisms to reduce arsenic uptake and translocation in rice (Oryza sativa L.) plants

Environ Pollut. 2021 Nov 1:288:117785. doi: 10.1016/j.envpol.2021.117785. Epub 2021 Jul 12.

Authors

Temoor Ahmed¹, Muhammad Noman¹, Natasha Manzoor², Muhammad Shahid³, Khalid Mahmud Hussaini⁴, Muhammad Rizwan⁵, Shafaqat Ali⁵, Awais Maqsood³, Bin Li⁶

Affiliations

¹ State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, 310058, Hangzhou, China.
² Department of Soil and Water Sciences, China Agricultural University, Beijing, 100083, China.
³ Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, 38000, Pakistan.
⁴ Institute of Environmental Sciences, University of Agriculture, Faisalabad, 38040, Pakistan.
⁵ Department of Environmental Sciences and Engineering, Government College University Faisalabad, Faisalabad, 38000, Pakistan.
⁶ State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, 310058, Hangzhou, China. Electronic address: libin0571@zju.edu.cn.

PMID: 34273764
DOI: 10.1016/j.envpol.2021.117785

Abstract

Arsenic (As) accumulation catastrophically disturbs the stability of agricultural systems and human health. Rice easily accumulates a high amount of As from agriculture fields as compare with other cereal crops. Hence, innovative soil remediation methods are needed to deal with the detrimental effects of As on human health causing food security challenges. Here, we report the green synthesis and characterization of magnesium oxide nanoparticles (MgO-NPs) from a native Enterobacter sp. strain RTN2, which was genetically identified through 16S rRNA gene sequence analysis. The biosynthesis of MgO-NPs in reaction mixture was confirmed by UV-vis spectral analysis. X-ray diffraction (XRD) and fourier transform-infrared spectroscopy (FTIR) analysis showed the crystalline nature and surface properties of MgO-NPs, respectively. Moreover, electron microscopy (SEM-EDS, and TEM) imaging confirmed the synthesis of spherical shape of MgO-NPs with variable NPs sizes ranging from 38 to 57 nm. The results revealed that application of MgO-NPs (200 mg kg^-1) in As contaminated soil significantly increased the plant biomass, antioxidant enzymatic contents, and decreased reactive oxygen species and acropetal As translocation as compared with control treatment. The study concluded that biogenic MgO-NPs could be used to formulate a potent nanofertilizer for sustainable rice production in metal contaminated soils.

Keywords: Antioxidants; Arsenic; Biosynthesis; Nanoparticles; Rice.

MeSH terms

Arsenic*
Humans
Magnesium Oxide
Metal Nanoparticles*
Nanoparticles*
Oryza*
Oxidative Stress
RNA, Ribosomal, 16S / genetics
Spectroscopy, Fourier Transform Infrared
X-Ray Diffraction

Substances

RNA, Ribosomal, 16S
Magnesium Oxide
Arsenic