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Polystyrene Nanoplastics Reshape The Peatland Plants (sphagnum) Bacteriome Under Simulated Wet-deposition Pathway: Insights Into Unequal Impact Of Ecological Niches.

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Polystyrene Nanoplastics Reshape The Peatland Plants (sphagnum) Bacteriome Under Simulated Wet-deposition Pathway: Insights Into Unequal Impact Of Ecological Niches.

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Polystyrene nanoplastics reshape the peatland plants (Sphagnum) bacteriome under simulated wet-deposition pathway:

Sijing Tang¹, Jin Qian¹, Yueming Zhu²

¹Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, PR China; College of Environment, Hohai University, Nanjing 210098, PR China.

Journal of Hazardous Materials

|March 23, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

Keywords:

Endophytes Epiphytes Nanoplastics Polystyrene Sphagnum

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Nanoplastics (NPs) disrupt peatland bacterial communities and Sphagnum moss growth. Reduced bacterial diversity surprisingly alleviates NP toxicity, highlighting complex plant-microbe interactions in response to pollution.

Area of Science:

Environmental Science
Microbiology
Ecotoxicology

Background:

Peatlands are vulnerable to atmospheric nanoplastic (NP) deposition.
The impact of NPs on Sphagnum bacterial communities (SBCs) and plant health is largely unknown.

Purpose of the Study:

To investigate how NPs affect SBCs composition, structure, and co-occurrence patterns.
To determine the effects of NPs on Sphagnum growth and physiological performance.
To explore the relationship between SBCs and Sphagnum responses to NP exposure.

Main Methods:

A 30-day simulated wet deposition experiment using polystyrene NPs.
Analysis of SBCs diversity, structure, and molecular ecological networks (MENs).
Assessment of Sphagnum spread area, chlorophyll content, and biomass.

Structural equation modeling to link bacterial communities and plant responses.

Main Results:

NPs reduced SBCs alpha-diversity and altered epiphyte and endophyte structures.
NPs disrupted SBCs symbiosis, impacting MENs and inter-domain ecological networks (IDENs).
Increasingly positive NP surface charges correlated with decreased SBCs abundance.
NPs reduced Sphagnum spread area and chlorophyll content, but not significantly biomass.
Reduced SBCs alpha-diversity partially offset NP phytotoxicity.

Conclusions:

NPs pose a risk to remote peatland ecosystems.
Sphagnum plant-bacteriome symbiosis exhibits complex responses to NP pollution.
Bacterial methane oxidation, carbon fixation, and trace element metabolism may mediate plant nutrient supply under NP stress.