1. Assessing the combined impacts of microplastics and nickel oxide nanomaterials on soybean growth and nitrogen fixation potential.
- Author
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Azeem I, Wang Q, Adeel M, Shakoor N, Zain M, Khan AA, Li Y, Azeem K, Nadeem M, Zhu G, and Yukui R
- Subjects
- Nanostructures toxicity, Nanostructures chemistry, Polystyrenes toxicity, Polystyrenes chemistry, Soil Pollutants toxicity, Plant Roots drug effects, Plant Roots growth & development, Plant Roots metabolism, Root Nodules, Plant drug effects, Root Nodules, Plant growth & development, Root Nodules, Plant microbiology, Root Nodules, Plant metabolism, Plant Growth Regulators pharmacology, Nickel toxicity, Nitrogen Fixation drug effects, Glycine max drug effects, Glycine max growth & development, Glycine max metabolism, Microplastics toxicity
- Abstract
The excessive presence of polystyrene microplastic (PS-MPx) and nickel oxide nanomaterials (NiO-NPs) in agriculture ecosystem have gained serious attention about their effect on the legume root-nodule symbiosis and biological nitrogen fixation (BNF). However, the impact of these contaminants on the root-nodule symbiosis and biological N
2 -fixation have been largely overlooked. The current findings highlighted that NiO-NMs at 50 mg kg-1 improved nodule formation and N2 -fixation potential, leading to enhanced N2 uptake by both roots and shoots, resulting in increased plant growth and development. While single exposure of PS-MPx (500 mg kg-1 ) significantly reduced the photosynthetic pigment (8-14 %), phytohormones (9-25 %), nodules biomass (24 %), N2 -related enzymes (12-17 %) that ultimately affected the N2 -fixation potential. Besides, co-exposure of MPx and NiO at 100 mg kg-1 altered the nodule morphology. Additionally, single and co-exposure of MPx and NiO-NMs at 100 mg kg-1 reduced the relative abundance of Proteobacteria, Gemmatimonadota, Actinobacteria, Firmicutes, and Bacteroidetes is associated with N2 -cycling and N2 -fixation potential. The findings of this study will contribute to understanding the potential risks posed by MPx and NiO-NMs to leguminous crops in the soil environment and provide scientific insights into the soybean N2 -fixation potential., Competing Interests: Declaration of Competing Interest The authors declare that they have no financial or personal relationships that could influence the research work presented in this manuscript. There are no conflicts of interest regarding the publication of this research., (Copyright © 2024 Elsevier B.V. All rights reserved.)- Published
- 2024
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