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Title
Spruce bark extract as modulator in rape plant copper bioaccumulation
Authors
Alina Stingu Irina Volf and Valentin I. Popa
Received
October 11, 2010
Published
Volume 45 Issue 3-4 March-April
Keywords
spruce bark, assimilatory pigments, bioaccumulation
Abstract
The aim of this research work was to investigate the influence of spruce bark natural bioactive compounds on copper bioaccumulation in rape plants. To eliminate the influence of soil characteristics and microorganism interaction, germination tests and hydroponic culture experiments were carried out in the presence of different polyphenolic aqueous extracts and various copper ion concentrations (10, 25, 50 mg/L CuSO ). To evaluate the effects of spruce bark polyphenolic extracts (0.580, 1.004, 1.912 g dry matter 4 content/L), the following parameters were determined: content of chlorophyll a and b, concentration of copper ions at root level and their translocation to hypocotyls and cotyledons, as well as the bioaccumulation factor. The presence of spruce bark extracts in a copper contaminated environment stimulates the development of rape plantlets and blocks the heavy metal access to the plant.
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