English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The experiments of uptake of heavy metallic elements in aquatic plants were carried out to elucidate the behavior of these elements in aquatic plants. Two hydroponic plants, Eichhornia crassipes and Egeria densa, were cultivated for 30 days in culture solution which contained various amounts of metallic elements such as Cd, Cr, Cu, Fe, Mn and Zn. The uptake of Cd, Cr, and Cu which occured in low levels in plants was increased with increase of concentrations of metals in culture solution. Similar tendency was observed in the behavior of Zn, but no correlation was observed between the amount of Mn uptake and the concentration of Mn in culture solution. Ferric ions were precipitated as iron (III) hydroxide immediately after the addition. Nevertheless, the plant took in a large amount of ferric ions from culture solution. It seems that a plant has a unique mechanism in regard to the uptake and the discharge of iron. When the culture solution was exchanged every 10 days during the cultivation of Egeria densa, the amounts of uptake of heavy metallic elements, except iron, increased for 30 days. The uptake of iron by the plant decreased temporarily and began to increase since then.

The behavior of heavy metallic elements in plants. (I). The uptake of heavy metallic elements by aquatic plants.