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Microplastics in soil can increase nutrient uptake by wheat

Liu, Yuhuai ; Xiao, Mouliang ; Shahbaz, Muhammad LU ; Hu, Zhi'e ; Zhu, Zhenke ; Lu, Shunbao ; Yu, Yongxiang ; Yao, Huaiying ; Chen, Jianping and Ge, Tida (2022) In Journal of Hazardous Materials 438.
Abstract

Microplastics can perturb microbial nutrient-mining strategies. However, the mechanism by which microplastics affect the resource-acquisition strategies of crops in agricultural systems remains unknown. The nutrient-acquisition potential of crops and microbes was investigated under treatments with two common microplastics (polyethylene [PE] and polyvinyl chloride [PVC]) at 0%, 1%, and 5% (w/w). Different root resource-acquisition strategies disturbed microbial nutrient turnover in the rhizosphere in response to microplastic addition. Specifically, the β-1,4-glucosidase (BG) hotspot expanded, whereas the rhizosphere expansion of BG activity decreased. A decrease of less than PE1% (w/w) and an expansion of less than PE5% (w/w) in the... (More)

Microplastics can perturb microbial nutrient-mining strategies. However, the mechanism by which microplastics affect the resource-acquisition strategies of crops in agricultural systems remains unknown. The nutrient-acquisition potential of crops and microbes was investigated under treatments with two common microplastics (polyethylene [PE] and polyvinyl chloride [PVC]) at 0%, 1%, and 5% (w/w). Different root resource-acquisition strategies disturbed microbial nutrient turnover in the rhizosphere in response to microplastic addition. Specifically, the β-1,4-glucosidase (BG) hotspot expanded, whereas the rhizosphere expansion of BG activity decreased. A decrease of less than PE1% (w/w) and an expansion of less than PE5% (w/w) in the 1,4-N-acetyl-glucosaminidase (NAG) hotspot with wider rhizosphere expansion of NAG activity indicated that higher doses of PE allow roots to uptake additional N. The phosphomonoesterase (PHOS) hotspot decreased in PE1% (w/w) and expanded in PE5% (w/w), but rhizosphere expansion did not change under PE treatments. However, both NAG and PHOS hotspots expanded with decreasing rhizosphere expansion under PVC treatments, indicating that PVC limits the utilization of available N and P, forcing the crop to obtain nutrients from the narrow root zone. These results indicate that adding PE microplastics increases the demand for and consumption of NH4+-N and NO3--N by wheat.

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author
; ; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Enzyme, Hotspot, Microplastic, Nutrient-acquisition strategies, Rhizosphere and bulk soil
in
Journal of Hazardous Materials
volume
438
article number
129547
publisher
Elsevier
external identifiers
  • pmid:35999743
  • scopus:85133906968
ISSN
0304-3894
DOI
10.1016/j.jhazmat.2022.129547
language
English
LU publication?
yes
id
a67fd33d-56ce-46c5-8958-e6f7a67a99ec
date added to LUP
2022-09-26 16:06:22
date last changed
2022-11-17 23:57:28
@article{a67fd33d-56ce-46c5-8958-e6f7a67a99ec,
  abstract     = {{<p>Microplastics can perturb microbial nutrient-mining strategies. However, the mechanism by which microplastics affect the resource-acquisition strategies of crops in agricultural systems remains unknown. The nutrient-acquisition potential of crops and microbes was investigated under treatments with two common microplastics (polyethylene [PE] and polyvinyl chloride [PVC]) at 0%, 1%, and 5% (w/w). Different root resource-acquisition strategies disturbed microbial nutrient turnover in the rhizosphere in response to microplastic addition. Specifically, the β-1,4-glucosidase (BG) hotspot expanded, whereas the rhizosphere expansion of BG activity decreased. A decrease of less than PE1% (w/w) and an expansion of less than PE5% (w/w) in the 1,4-N-acetyl-glucosaminidase (NAG) hotspot with wider rhizosphere expansion of NAG activity indicated that higher doses of PE allow roots to uptake additional N. The phosphomonoesterase (PHOS) hotspot decreased in PE1% (w/w) and expanded in PE5% (w/w), but rhizosphere expansion did not change under PE treatments. However, both NAG and PHOS hotspots expanded with decreasing rhizosphere expansion under PVC treatments, indicating that PVC limits the utilization of available N and P, forcing the crop to obtain nutrients from the narrow root zone. These results indicate that adding PE microplastics increases the demand for and consumption of NH<sub>4</sub><sup>+</sup>-N and NO<sub>3</sub><sup>-</sup>-N by wheat.</p>}},
  author       = {{Liu, Yuhuai and Xiao, Mouliang and Shahbaz, Muhammad and Hu, Zhi'e and Zhu, Zhenke and Lu, Shunbao and Yu, Yongxiang and Yao, Huaiying and Chen, Jianping and Ge, Tida}},
  issn         = {{0304-3894}},
  keywords     = {{Enzyme; Hotspot; Microplastic; Nutrient-acquisition strategies; Rhizosphere and bulk soil}},
  language     = {{eng}},
  month        = {{09}},
  publisher    = {{Elsevier}},
  series       = {{Journal of Hazardous Materials}},
  title        = {{Microplastics in soil can increase nutrient uptake by wheat}},
  url          = {{http://dx.doi.org/10.1016/j.jhazmat.2022.129547}},
  doi          = {{10.1016/j.jhazmat.2022.129547}},
  volume       = {{438}},
  year         = {{2022}},
}