Effect of soil contamination with cadmium on its accumulation by barley plants in ontogenesis | Влияние загрязнения почв кадмием на его накопление растениями ячменя в онтогенезе
2010
Ul'yanenko, L.N. | Kruglov, S.V. | Filipas, A.S. | Loj, N.N. | Stepanchikova, N.S., All-Russia Research and Development Inst. of Agricultural Radiology and Agroecology, Kaluga Region (Russian Federation)
A dynamic of Cd uptake by the plants of spring barley Zazerskij 85 was studied. The plants were grown on different polluted soils: loamy sand podzol (SP) and chernozem (CN). In SP and CN humus content was 1.7 and 4.7%, pH was 5.2 and 5.3, cation exchange capacity was 9.3 and 34.3 mg-equivalent /100 g of soil respectively. The concentrations of Cd were the follow: 1,2,5,10,20 and 50 for SP and 2,5,10, 20, 50 and 100 mg/kg for CN. The barley was grown up the stage of fully ripe (for 3.5 months). The plants were selected for the tests at the stages of beginning of tillering, end of stem elongation and fully ripe (on the 21, 60 and 100 day respectively). For the all test period Cd uptake from SP was more intensive than from CN. Young plants accumulated Cd more actively than adult ones of the regardless to the soil type. The highest Cd accumulation was fixed on the 21 day. At early development stages Cd accumulation influenced on plant biomass, but the effect was down with advancing age. Toxic Cd influence exhibited when Cd content in the plants were higher than 20 mg/kg of dry weight. Increase of chromosome aberration frequency, double bridge appearance, a–mitosis of the double fragments and chromosome lagging (at the stage of beginning of tillering) were fixed only when Cd content in the plants was higher than 50 mg/kg
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