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Tuba Aridil Ayten1, Jason C White2, Mehmet İşleyen3,4,5

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Adding moss (Selaginella kraussiana) to soil significantly reduced p,p’-DDE accumulation in plants. This moss amendment offers a promising strategy for enhancing food safety by minimizing persistent organic pollutant transfer.

Keywords:
Cucurbita pepo ssp. pepomoss amendmentsp,p′-DDE contaminated soilxylem sap

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Area of Science:

  • Environmental Science
  • Plant Biology
  • Toxicology

Background:

  • p,p’-DDE, a persistent environmental pollutant from p,p’-DDT use, is accumulated by Cucurbita pepo.
  • The mechanism of p,p’-DDE uptake by plants is not fully understood.
  • Mosses can retain chlorinated organic compounds, serving as bioindicators.

Purpose of the Study:

  • To assess the impact of Selaginella kraussiana moss amendment on p,p’-DDE accumulation and translocation in Cucurbita pepo.
  • To investigate the effect of moss amendment on p,p’-DDE levels in plant roots, shoots, and xylem sap.
  • To evaluate the potential of moss amendments for reducing contaminant bioavailability in soil.

Main Methods:

  • Cucurbita pepo grown in pots with or without Selaginella kraussiana.
  • Two soils with varying p,p’-DDE contamination levels were used.
  • p,p’-DDE concentrations were measured in plant tissues (roots, shoots) and xylem sap.

Main Results:

  • Moss amendment decreased p,p’-DDE concentrations in xylem sap by over 60%.
  • Root and shoot p,p’-DDE concentrations were reduced by approximately 70% and 55%, respectively, in moss-amended plants.
  • Significant reduction in p,p’-DDE bioaccumulation was observed with moss amendment.

Conclusions:

  • Selaginella kraussiana amendment effectively reduces p,p’-DDE bioaccumulation in Cucurbita pepo.
  • Moss amendments alter contaminant bioavailability in the rhizosphere, limiting uptake.
  • This approach shows potential for improving food safety and reducing POP transfer in agricultural systems.