Journal
CHEMOSPHERE
Volume 84, Issue 11, Pages 1636-1641Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2011.05.024
Keywords
Myriophyllum spicatum; Ceratophyllum demersum; Se species; Photochemical efficiency; Chlorophyll
Categories
Funding
- Ministry of Higher Education, Science and Technology of the Republic of Slovenia [32059, P1-0212, J4-2041]
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The uptake of Se (VI) by two aquatic plants. Myriophyllum spicatum Land Ceratophyllum demersum L, and its effects on their physiological characteristics have been studied. Plants were cultivated outdoors under semi-controlled conditions and in two concentrations of Na selenate solution (20 mu g Se L-1 and 10 mg Se L-1). The higher dose of Se reduced the photochemical efficiency of PSII in both species, while the lower dose had no effect on PSII. Addition of Se had no effect on the amounts of chlorophyll a and b. The concentration of Se in plants grown in 10 mg Se L-1, averaged 212 +/- 12 mu g Se g(-1) DM in M. spicatum (grown from 8-13 d), and 492 +/- 85 mu g Se g-1 DM in C. demersum (grown for 31 d). Both species could take up a large amount of Se. The amount of soluble Se compounds in enzyme extracts ranged from 16% to 26% in control, and in high Se solution from 48% to 36% in M. spicatum and C. demersum, respectively. Se-species were determined using HPLC-ICP-MS. The main soluble species in both plants was selenate (similar to 37%), while SeMet and SeMeSeCys were detected at trace levels. (C) 2011 Elsevier Ltd. All rights reserved.
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