Articles
EFFECT OF DIFFERENT CADMIUM COMPOUNDS ON CHAMOMILE PLANTS
Article number
749_27
Pages
223 – 229
Language
English
Abstract
Effects of CdSeO4, CdSeO3, Cd(NCSe)2(nia)2 and Cd(NCS)2(nia) applied at concentrations 12, 24 and 60 µmol dm-3 on growth as well as Cd and Se accumulation in roots and shoots of hydroponically cultivated chamomile plants (Goral) were investigated.
In the applied concentration range the studied compounds affected significantly neither the length of roots and shoots nor the dry mass of roots and shoots.
However, effect of Se speciation on the accumulated amount of Cd and Se (in mg g-1 d.m.) in plant organs of chamomile was notable what was reflected in the values of bioaccumulation factors (BAF), translocation factors as well as portion from the total accumulated metal amount by the plant occurring in the shoots.
Independently on the applied compound the BAF values determined for Cd accumulation in roots were higher than those determined for Cd accumulation in shoots.
The highest BAF values determined for Cd accumulation in shoots were obtained with CdSeO4. The comparison of the effect of Cd(NCSe)2(nia)2 and Cd(NCS)2(nia) showed that exchange of S for Se in the NCX- ligand led to decreased translocation of Cd into the shoots.
The application of selenate resulted in intensive translocation of Se into the shoots and for this compound the BAF values determined for shoots were approximately 2.5-times higher than those determined for roots.
The corresponding BAF values for Cd(NCSe)2(nia)2 were similar to those of CdSeO3. At application of CdSeO4, 90% of uptaken Se and 50% of uptaken Cd was situated in the shoots.
In the applied concentration range the studied compounds affected significantly neither the length of roots and shoots nor the dry mass of roots and shoots.
However, effect of Se speciation on the accumulated amount of Cd and Se (in mg g-1 d.m.) in plant organs of chamomile was notable what was reflected in the values of bioaccumulation factors (BAF), translocation factors as well as portion from the total accumulated metal amount by the plant occurring in the shoots.
Independently on the applied compound the BAF values determined for Cd accumulation in roots were higher than those determined for Cd accumulation in shoots.
The highest BAF values determined for Cd accumulation in shoots were obtained with CdSeO4. The comparison of the effect of Cd(NCSe)2(nia)2 and Cd(NCS)2(nia) showed that exchange of S for Se in the NCX- ligand led to decreased translocation of Cd into the shoots.
The application of selenate resulted in intensive translocation of Se into the shoots and for this compound the BAF values determined for shoots were approximately 2.5-times higher than those determined for roots.
The corresponding BAF values for Cd(NCSe)2(nia)2 were similar to those of CdSeO3. At application of CdSeO4, 90% of uptaken Se and 50% of uptaken Cd was situated in the shoots.
Authors
J. Lesíková, K. Kráľová, E. Masarovičová, J. Kubová, I. Ondrejkovičová
Keywords
hydroponic cultivation, Matricaria recutita, metal bioaccumulation, selenate, selenite, selenocyanate ligand
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