Maghemite Nanoparticles Acts as Nanozymes, Improving Growth and Abiotic Stress Tolerance in Brassica napus

N G Martin Palmqvist; Gulaim A Seisenbaeva; Peter Svedlindh; Vadim G Kessler

doi:10.1186/s11671-017-2404-2

Maghemite Nanoparticles Acts as Nanozymes, Improving Growth and Abiotic Stress Tolerance in Brassica napus

Nanoscale Res Lett. 2017 Dec 19;12(1):631. doi: 10.1186/s11671-017-2404-2.

Authors

N G Martin Palmqvist¹, Gulaim A Seisenbaeva², Peter Svedlindh³, Vadim G Kessler²

Affiliations

¹ Department of Chemistry and Biotechnology, Swedish University Agricultural Sciences, Box 7015, SE-75007, Uppsala, Sweden. martin.palmqvist@slu.se.
² Department of Chemistry and Biotechnology, Swedish University Agricultural Sciences, Box 7015, SE-75007, Uppsala, Sweden.
³ Department of Engineering Sciences, Solid State Physics, Uppsala university, Box 534, SE-75121, Uppsala, Sweden.

Abstract

Yttrium doping-stabilized γ-Fe₂O₃ nanoparticles were studied for its potential to serve as a plant fertilizer and, through enzymatic activity, support drought stress management. Levels of both hydrogen peroxide and lipid peroxidation, after drought, were reduced when γ-Fe₂O₃ nanoparticles were delivered by irrigation in a nutrient solution to Brassica napus plants grown in soil. Hydrogen peroxide was reduced from 151 to 83 μM g^-1 compared to control, and the malondialdehyde formation was reduced from 36 to 26 mM g^-1. Growth rate of leaves was enhanced from 33 to 50% growth compared to fully fertilized plants and SPAD-measurements of chlorophyll increased from 47 to 52 suggesting improved agronomic properties by use of γ-Fe₂O₃ nanoparticles as fertilizer as compared to chelated iron.

Keywords: Agrobio nanotechnology; Catalase activity; Drought stress; Growth promotion; Iron oxide nanoparticles; Maghemite nanoparticles; Nano agriculture; Nanofertilizer; Nanozyme; Reactive oxygen species scavenging.

Grants and funding

2012-581/Svenska Forskningsrådet Formas