Following Cd absorption from a nutrient medium Wolffiella gladiata (Lemnaceae) plantlets were subjected to compartmental analysis. A plot of the quantity of easily exchangeable cadmium in the cytoplasm (EECd-cyt) versus time showed a sigmoid curve after absorption from weakly concentrated media (0.001 mM Cd and more) and a hyperbolic curve after absorption from highly concentrated media (up to 0.4 mM Cd). A plot of EECd-cyt versus the Cd-concentration in the medium showed sigmoid curves after absorption during short periods (10-20-30 min) and hyperbolic curves after long-term absorption (up to 4 hours). An increase in EECd-cyt resulted in a decrease in net absorption. The amounts of Cd in the three distinguished intracellular (chemical) compartments increased partly simultaneously. The Cd that was retained until the last fraction was to be washed out of the plants is supposed to be strongly complexed. This fraction of complexed Cd is the last to be completed during absorption.

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Acta botanica neerlandica

CC BY 3.0 NL ("Naamsvermelding")

Koninklijke Nederlandse Botanische Vereniging

W.A.C. Schreinemakers. (1986). The interaction between Cd-absorption and Cd-compartmentation in Wolffiella gladiata. Acta botanica neerlandica, 35(1), 23–34.