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Related Experiment Videos

Low level mercury uptake by plants from natural environments--mercury distribution in Solidago altissima L.-.

Takashi Tomiyasu1, Tomonori Matsuo, Junko Miyamoto

  • 1Department of Earth and Environmental Sciences, Faculty of Science, Kagoshima University, Korimoto, Kagoshima 890-0065, Japan. tomy@sci.kagoshima-u.ac.jp

Environmental Sciences : an International Journal of Environmental Physiology and Toxicology
|September 27, 2005
PubMed
Summary
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Tall goldenrod plants absorb mercury from ambient air into their leaves, not from soil. This airborne mercury returns to the soil when leaves fall, impacting mercury biogeochemical cycling.

Area of Science:

  • Environmental Science
  • Biogeochemistry
  • Plant Biology

Background:

  • Plants play a role in mercury biogeochemical cycling.
  • Understanding plant mercury uptake is crucial for environmental monitoring.

Purpose of the Study:

  • To determine total mercury content in different parts of tall goldenrod (Solidago altissima L.).
  • To elucidate the pathways of mercury accumulation in plants and their contribution to environmental mercury cycling.

Main Methods:

  • Quantification of total mercury content in leaves, stems, and roots of Solidago altissima.
  • Correlation analysis between mercury concentrations in plant tissues and soil.

Main Results:

  • Mercury content was significantly lower in stems compared to leaves and roots.

Related Experiment Videos

  • A positive correlation was found between soil and root mercury content.
  • Leaf mercury concentration was independent of soil mercury but higher in lower leaves, suggesting atmospheric deposition.
  • Mercury did not translocate from roots to stems or leaves, nor was it released into the air.

    • Conclusions:

    • Solidago altissima leaves accumulate mercury predominantly from ambient air, not soil.
    • Fallen leaves transfer airborne mercury to the soil, influencing soil mercury levels.
    • Root adsorption of soil mercury is significant, but translocation within the plant is limited.