Effect of metal and metal oxide nanoparticles on growth and physiology of globally important food crops: A critical review.

Abstract

The concentrations of engineered metal and metal oxide nanoparticles (NPs) have increased in the environment due to increasing demand of NPs based products. This is causing a major concern for sustainable agriculture. This review presents the effects of NPs on agricultural crops at biochemical, physiological and molecular levels. Numerous studies showed that metal and metal oxide NPs affected the growth, yield and quality of important agricultural crops. The NPs altered mineral nutrition, photosynthesis and caused oxidative stress and induced genotoxicity in crops. The activities of antioxidant enzymes increased at low NPs toxicity while decreased at higher NPs toxicity in crops. Due to exposure of crop plants to NPs, the concentration of NPs increased in different plant parts including fruits and grains which could transfer to the food chain and pose a threat to human health. In conclusion, most of the NPs have both positive and negative effects on crops at physiological, morphological, biochemical and molecular levels. The effects of NPs on crop plants vary greatly with plant species, growth stages, growth conditions, method, dose, and duration of NPs exposure along with other factors. Further research orientation is also discussed in this review article.

DOI: 10.1016/j.jhazmat.2016.05.061

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Cite this paper

@article{Rizwan2017EffectOM, title={Effect of metal and metal oxide nanoparticles on growth and physiology of globally important food crops: A critical review.}, author={Muhammad Rizwan and Shafaqat Ali and Muhammad Farooq Qayyum and Yong Sik Ok and Muhammad Nawaz Adrees and Muhammad Twaha Ibrahim and Muhammad Zia-ur-Rehman and Mujahid Farid and Farhat Abbas}, journal={Journal of hazardous materials}, year={2017}, volume={322 Pt A}, pages={2-16} }