Indications of selenium protection against cadmium and lead toxicity in oilseed rape (brassica napus L.)

Zhilin Wu, Xuebin Yin, Gary S. Bañuelos, Zhi Qing Lin, Ying Liu, Miao Li*, Linxi Yuan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

93 Citations (Scopus)

Abstract

The present study investigated the beneficial role of selenium (Se) in protecting oilseed rape (Brassica napus L.) plants from cadmium (Cd+2) and lead (Pb+2) toxicity. Exogenous Se markedly reduced Cd and Pb concentration in both roots and shoots. Supplementation of the medium with Se (5, 10, and 15 mg kg−1) alleviated the negative effect of Cd and Pb on growth and led to a decrease in oxidative damages caused by Cd and Pb. Furthermore, Se-enhanced superoxide free radicals (O2•¯), hydrogen peroxide (H2O2), and lipid peroxidation, as indicated by malondialdehyde accumulation, but decreased superoxide dismutase and glutathione peroxidase activities. Meanwhile, the presence of Cd and Pb in the medium affected Se speciation in shoots. The results suggest that Se could alleviate Cd and Pb toxicity by preventing oxidative stress in oilseed rape plant.

Original languageEnglish
Article number1875
JournalFrontiers in Plant Science
Volume7
Issue numberDECEMBER2016
DOIs
Publication statusPublished - 15 Dec 2016
Externally publishedYes

Keywords

  • Antioxidant defense system
  • Cadmium
  • Lead
  • Oilseed rape (brassica napus L.)
  • Oxidative stress
  • Selenium

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