Accumulation of copper by sunflower plants (Helianthus annuus L.) grown in hydroponic system
2019
Racić, G. | Vukelić, I. | Radić, D. | Bojović, M. | Mrkajić, D. | Jovanović, Lj. | Panković, D.
Metal pollution of soils is important environmental risk, that imposes the need for development of different methods for their removal. The use of plants that are able to accumulate and tolerate high metal concentrations is one approach that is being examined for that purpose. Sunflower (Helianthus annuus L.) has been proven as good hyperacumulator of metals, with ability to extract them from the soil and translocate them from roots to shoots and leaves. In this work we have examined ability of sunflower to accumulate copper in hydroponic conditions. Sunlower plants were grown in presence of copper with final concentrations of 50 ppm, 100 ppm and 200 ppm. Fresh and dry mass of different plant organs was measured, as well as plant height, 7 days after metal application. ICP-OES method was used to measure concentration of copper in stem and leaves of sunflower plants according to EPA 6010C method. Results has shown that copper addition decreased plants height, fresh and dry mass of stem and leaves. According to the heavy metal content measured in different plant organs it can be suggested that copper was translocated from stem to leaves. In order to conclude that sunflower could be used as good metal accumulator in copper polluted soils, further analysis of copper content in roots should be undertaken.
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