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Section 1: Publication
Publication Type
Journal Article
Authorship
Ren, Xinwei; Wang, Lan; Tang, Jingchun; Sun, Hongwen; Giesy, John P.
Title
Combined effects of degradable film fragments and micro/nanoplastics on growth of wheat seedling and rhizosphere microbes
Year
2022
Publication Outlet
Environmental Pollution, Vol. 294, 118516
DOI
ISBN
ISSN
0269-7491
Citation
Ren, Xinwei; Wang, Lan; Tang, Jingchun; Sun, Hongwen; Giesy, John P. (2022) Combined effects of degradable film fragments and micro/nanoplastics on growth of wheat seedling and rhizosphere microbes, Environmental Pollution, Vol. 294, 118516,
https://doi.org/10.1016/j.envpol.2021.118516
Abstract
Multiple sources of microplastics (MPs) in farmland could result in the changing of microbial community and the plant growth. Most studies of MPs in agricultural system have focused on the effects of single types of MPs on growth of plants, while neglect interactions between multiple types of MPs. In this study a pot-experiment was conducted to investigate the effects of multiple types of MPs, including polystyrene beads: M1, 5 μm, M2, 70 nm and degradable mulching film (DMF) fragments on growth of wheat seedlings and associated rhizosphere microbial community. CKD (adding DMF) significantly reduced plant height and base diameter of wheat seedlings. DMF in combination with M2, significantly increased plant height and aboveground biomass, but decreased the base diameter. Actinobacteria was the dominant taxa in the rhizosphere bacterial community in various treatments. PCoA analysis showed that the bacterial composition in M2HD (100 mg kg−1 M2 with DMF) was significantly different from that of CKD and M2LD (10 mg kg−1 M2 with DMF). At the level of genera, the dominant fungi in CKD and M2LD were in the genus Fusarium, which is the cause of wheat fusarium blight and Alternaria, which results in decreased base diameter. In CK (control group) and M2HD, Blastobotrys exhibited the greatest abundance, which assisted wheat seedlings in resisting Verticillium disease. Cluster and PCoA analysis showed the fungal composition in CKD was significantly different from CK, M2LD and M2HD. These findings suggest MPs potentially have selective effects on pathogens that affect growth of plants and potentially safety of the food.
Plain Language Summary
Section 2: Additional Information
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Additional Information
Keywords: Multi-sources; Microplastics; Degradable mulching film fragments; Polystyrene; Rhizosphere microbial community; Seedling