title: Distribution of Se and its species in Myriophyllum spicatum and Ceratophyllum demersum growing in water containing Se (VI).
abstract: The uptake of Se (VI) by two aquatic plants, Myriophyllum spicatum L. and 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 μg 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 μg Seg(-1) DM in M. spicatum (grown from 8-13 d), and 492 ± 85 μg 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 (∼37%), while SeMet and SeMeSeCys were detected at trace levels.
authors.affiliation: Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia.
authors.forename: Spela
authors.initials: S
authors.lastname: Mechora
authors.forename: Petra
authors.initials: P
authors.lastname: Cuderman
authors.forename: Vekoslava
authors.initials: V
authors.lastname: Stibilj
authors.forename: Mateja
authors.initials: M
authors.lastname: Germ
mesh_terms: D002734:Chlorophyll / Q000378:metabolism; D000077194:Chlorophyll A; D002851:Chromatography, High Pressure Liquid; D003545:Cysteine / Q000031:analogs & derivatives / Q000032:analysis; D003553:Cystine / Q000031:analogs & derivatives / Q000032:analysis; D019684:Magnoliopsida / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D013058:Mass Spectrometry; D016566:Organoselenium Compounds / Q000032:analysis; D045332:Photosystem II Protein Complex / Q000187:drug effects* / Q000378:metabolism; D064586:Selenic Acid; D018036:Selenium Compounds / Q000032:analysis*; D017279:Selenocysteine / Q000031:analogs & derivatives; D012645:Selenomethionine / Q000032:analysis; D014867:Water / Q000737:chemistry*
chemical_list: D016566:Organoselenium Compounds; D045332:Photosystem II Protein Complex; D018036:Selenium Compounds; D014867:Water; D017279:Selenocysteine; D002734:Chlorophyll; C009226:selenocystine; D003553:Cystine; C037184:chlorophyll b; D012645:Selenomethionine; D064586:Selenic Acid; D003545:Cysteine; C002979:selenomethylselenocysteine; D000077194:Chlorophyll A