ABSTRACT
The uptake by barley and the distribution between the vegetative and the generative organs of 137Cs, K and Ca was studied when plants were grown on soddy-podzolic soil with the background content of heavy metals and soil polluted with Cd and Co at concentrations significantly above the maximum permissible concentration (50 i 100 mg/kg accordingly). The reduction was found in 137Cs accumulation and removal with barley in ontogenesis under the action of increased contents of heavy metals in the soil, which was caused by their phytotoxic effect.
Subject(s)
Cesium Radioisotopes/analysis , Hordeum/growth & development , Metals, Heavy/analysis , Soil Pollutants/analysis , Biomass , Cesium Radioisotopes/pharmacokinetics , Cesium Radioisotopes/toxicity , Hordeum/drug effects , Hordeum/radiation effects , Metals, Heavy/pharmacokinetics , Metals, Heavy/toxicity , Seeds/drug effects , Seeds/growth & development , Seeds/radiation effects , Soil Pollutants/pharmacokinetics , Soil Pollutants/toxicity , Soil Pollutants, Radioactive/analysis , Soil Pollutants, Radioactive/pharmacokinetics , Soil Pollutants, Radioactive/toxicityABSTRACT
The changes studied in 137Cs uptake by plants and its distribution between vegetative and generative organs of barley cultivated with the application of potassium humate. A relationship has been found between 137Cs accumulation size in barley at various ontogenesis stages and way of potassium humate application (treatment of seeds or plants), as well as availability of mineral nutrients in the soil. Changes in K+ and NH4+ concentrations in soil solution are shown to be of prevailing importance in regulating 137Cs uptake by plants compared with potassium humate effects.
Subject(s)
Cesium Radioisotopes/metabolism , Hordeum/metabolism , Humic Substances , Potassium Compounds , Seeds/metabolism , Soil Pollutants, Radioactive/metabolism , Cesium Radioisotopes/analysis , Fertilizers , Gardening/methods , Hordeum/growth & developmentABSTRACT
The morphophysiological properties of two generations of seeds from chronically exposed agrocenoses of the Chernobyl NPP accident zone were investigated. The difference in reactions between exposed and control seeds to acute stimulating irradiation and to treatment with biologically active substances was shown. The relationship between the degree of radiation depression of the seed morphological development indexes and biometric characteristics of plants on the plots with different radioactive contamination was revealed.
