Both Indian mustard and sunflower were grown in a hydroponic solution treated with different concentration activities of 134Cs or with different amounts of copper or with both in order to investigate the interaction between copper and radiocesium. It was found that 134Cs activity concentration applied in the nutrient solution exerted more influence on the uptake and translocation of copper by Indian mustard than by sunflower. Indian mustard grown in hydroponic solution containing certain levels of copper and being treated with higher 134Cs activity concentration showed higher uptake of copper than sunflower. However, in the case of root copper concentrations, sunflower showed significantly higher copper immobilization by roots than Indian mustard. It was also found that the presence of copper in the hydroponic solution did modify radiocesium uptake by both species. The application of 1 mg/l in the growth medium could greatly increase the uptake of 134Cs by both species. With 3 mg/l concentration of copper amended to the solution, the accumulation of 134Cs by both species was decreased compared to the 1 mg/l copper treatment. These lines of evidence show that there is stronger interaction between copper and radiocesium in Indian mustard than in sunflower during the root uptake through nutrient solution.
Authors:Ivica Liović, Vlado Kovačević, Miroslav Krizmanić, Anto Mijić and Branimir Šimić
Borbely, E.H., M. Lesznyak, E. Kutasy, J. Csajbok. 2005. The interactive examination of environmental and biological factors in the sunflower yields. Cereal Research Communications 33(1): 161–163.
Angelini Lg. — Belloni P. — Merrien A. — Mathis P. (1995): Gas Exchances on two inbred lines of sunflower with different leaf characteristics. Photosynthesis: From light to biosphere. Volume V. proceedings of the Xth
Authors:Ján Mihalík, Pavel Tlustoš and Jiřina Szaková
This study deals with an efficiency of a low dose of citric acid soil application on phytoextraction of uranium. Willow (Salix
spp.) and sunflower (Helianthus annus L.) were tested in this experiment with contaminated soil. The enhancing of uranium bioaccumulation was confirmed, but in
contrast to previous studies, the highest quantity of uranium was accumulated in leaves. After 5 weeks of citric acid treatment,
willow was more efficient in the uptake and translocation of uranium than sunflower. The transfer coefficient calculated for
leaves increased from 0.033 (control) to 0.74, or 0.56 after five doses of 5 mmol of citric acid per 1 kg of soil for willow
or sunflower, respectively. The uptake characterized by the total U content achieved 88 and 108 mg kg−1 in relation to the above ground parts of sunflower and willow, respectively. Even though both plants accumulated U in their
above ground parts in significant rate, they employed diverse ways to achieve it. At the end of the treatment, the physiological
condition of the plants enabled us to continue this method.
An investigation on the quality characteristics of wheat bread enriched with seeds of high-oleic sunflower is reported which included important parameters that affect its nutritional quality (chemical composition, fatty acid composition: saturated, monounsaturated, polyunsaturated, linoleic and linolenic acid, tocopherol content: α-, β-, γ-, δ-content of essential microelement selenium) and its sensory quality. The study also includes the assessment of a persistent pollutant, benzo[a]pyrene. The objective of the study was to determine and compare the concentrations of nutrients and contaminants of the control and enriched wheat bread in order to assess the benefits and potential risks of regular consumption of these products. It was found that bread enriched with seeds of high-oleic sunflower would significantly improve the daily intake of fat, fibre, selenium, α-tocopherol and linolenic acid. Regular consumption of a daily portion of such bread (300 g) would not incur significantly increased health risk from contaminant.