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3109798 
Journal Article 
AVENA SATIVA CADMIUM CONTENT, DISTRIBUTION AND TOXICITY IN DEPENDENCE ON CONCENTRATION OF ZINC AND NICKEL IN NUTRIENT MEDIUM 
Tuma, J; Svojanovska, H 
2015 
1 
Fresenius Environmental Bulletin
ISSN: 1018-4619
EISSN: 1610-2304 
24 
5A 
1798-1803 
WOS:000363071400006 
In a pot experiment with Avena sativa L. under controlled climabox conditions a research on the effect of increasing concentrations of Zn (50, 500 and 1000 mu M) and Ni (50, 250 and 500 mu M) to Cd uptake by roots and its translocation to shoots was carried out. Cd concentration in the nutrient medium was uniform - 50 mu M. Cd uptake will be evidently influenced mainly by the Zn/Cd ratio in the nutrient medium. Doses of Ni in the medium on the other hand resulted in a slightly higher content of Cd in the roots. Zn and Ni significantly influenced Cd translocation from roots to shoots. This can be related to different mobility of Ni and Zn in the plant. Ni mobility in the xylem is significantly higher than Zn mobility, Cd mobility is probably the lowest of these elements. While in the variant with the application of only 50 mu M of Cd the Cd roots/shoots ratio was 2.00, in the variant with application of the same dose of 50 mu M of Cd and Zn the ratio was 1.43, and vice versa in variants with application of 50 mu M Cd and Ni, the ratio increased by 2.39. Using higher doses above 500 mu M of Zn and Ni, Cd root/shoots ratio ranged only around 1. At the highest doses - 1000 mu M of Zn and mainly 500 mu M of Ni dose a significant increase of Cd concentration and inhibition in growth of shoots and roots was found concurrently. Decrease in Cd concentration in other variants could be connected with so-called dilution effect. 
cadmium uptake; translocation; toxicity; Avena sativa