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The uptake and distribution of selenium in three aquatic plants grown in Se(IV) solution

Author:
Mechora, Špela, Stibilj, Vekoslava, Germ, Mateja
Source:
Aquatic toxicology 2013 v.128-129 pp. 53-59
ISSN:
0166-445X
Subject:
Ceratophyllum demersum, Myriophyllum spicatum, Potamogeton perfoliatus, aquatic plants, selenium
Abstract:
The uptake of Se(IV) by Myriophyllum spicatum, Ceratophyllum demersum and Potamogeton perfoliatus, and the effects of Se(IV) on their physiological and biochemical characteristics were studied. Plants were cultivated outdoors under semi-controlled conditions in water solution containing Na selenite (20μgSeL−1 and 10mgSeL−1). The higher concentration of Se lowered the photochemical efficiency of PSII in all species studied, while the lower concentration had no effect on any species. The higher concentration of Se lowered respiratory potential in M. spicatum. The response of M. spicatum and C. demersum to Se(IV) regarding chlorophylls was variable, however in the majority of cases, there was a trend of increasing the amount of chlorophylls, while in P. perfoliatus the amount of chlorophyll a decreased. The concentration of Se in plants cultured in 10mgSe(IV)L−1 ranged from 436 to 839μgSeg−1 DM in M. spicatum, 319 to 988μgSeg−1 DM in C. demersum and 310 to 661μgSeg−1 DM in P. perfoliatus. The amount of soluble Se compounds in enzyme extracts of high Se treatment was 27% in M. spicatum, 41% in C. demersum and 35% in P. perfoliatus. Se compounds were determined using HPLC–ICP-MS. It was observed that the applied Se(IV) was mainly transformed to insoluble Se.
Agid:
443716