Journal
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
Volume 101, Issue 5, Pages 684-690Publisher
SPRINGER
DOI: 10.1007/s00128-018-2471-9
Keywords
Cadmium; Wheat; Photosynthesis; Ascorbate; Glutathione; Antioxidant enzymes
Categories
Funding
- Doctoral Scientific Research Foundation of Henan Agricultural University [30500592]
- National Key R&D Program of China [2017YFD0201700]
- Henan Province Science and Technology Research Project [172102110060]
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Wheat (Triticum aestivum L.) has relatively high tolerance to cadmium (Cd), but the underlying mechanisms are poorly understood. Growth and physiological parameters of wheat exposed to different Cd concentrations (0, 0.5, 5 and 50 mu M) were characterized. The fresh weight, leaf chlorophyll and carotenoid concentrations and photosynthesis parameters did not differ among Cd treatments, suggesting relatively high Cd tolerance in wheat. However, the soluble sugar concentrations increased with the increasing Cd concentration and the soluble protein concentrations decreased in both shoots and roots, suggesting that the Cd application promoted nitrogen metabolism over carbon metabolism. In addition, the higher concentrations of MDA, GSH and AsA and activities of antioxidant enzymes (SOD, POD, and CAT) were observed in leaves and roots in the Cd50 treatment. Our results reveal that wheat can tolerate Cd by enhancing the antioxidant enzymes activities and increasing the concentration of ascorbate and glutathione.
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