Comparative study on the impact of copper sulphate and copper nitrate on the detoxification mechanisms in typha latifolia

Lyudmila Lyubenova, Hanif Bipuah, Ebenezer Belford, Bernhard Michalke, Barbro Winkler, Peter Schröder

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

9 Zitate (Scopus)

Abstract

The present study focused on cupric sulphate and cupric nitrate uptake in Typha latifolia and the impact of these copper species on the plant's detoxification capacity. When the plants were exposed to 10, 50 and 100 (oMcupric sulphate or cupric nitrate, copper accumulation in T. latifolia roots and shoots increased with rising concentration of the salts. Shoot to root ratios differed significantly depending on the form of copper supplementation, e.g. if it was added as cupric (II) sulphate or cupric (II) nitrate. After incubation with 100 \iM of cupric sulphate, up to 450 mg Cu/kg fresh weight (FW) was accumulated, whereas the same concentration of cupric nitrate resulted in accumulation of 580 mg/kg FW. Furthermore, significant differences in the activity of some antioxidative enzymes in Typha roots compared to the shoots, which are essential in the plant's reaction to cope with metal stress, were observed. The activity of peroxidase (POX) in roots was increased at intermediate concentrations (10 and 50 |oM) of CuSO4, whereas it was inhibited at the same Cu(NO3)2 concentrations. Ascorbate peroxidase (APOX) and dehydroascorbate reductase (DHAR) increased their enzyme activity intensely, which may be an indication for copper toxicity in T latifolia plants. Besides, fluorodifen conjugation by glutathione S-transferases (GSTs) was increased up to.

OriginalspracheEnglisch
Seiten (von - bis)657-666
Seitenumfang10
FachzeitschriftEnvironmental Science and Pollution Research
Jahrgang22
Ausgabenummer1
DOIs
PublikationsstatusVeröffentlicht - 7 Aug. 2014
Extern publiziertJa

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