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Ecotoxicology

, Volume 22, Issue 3, pp 476–485 | Cite as

Hormesis phenomena under Cd stress in a hyperaccumulator—Lonicera japonica Thunb

  • Lian Jia
  • Xingyuan He
  • Wei Chen
  • Zhouli Liu
  • Yanqing Huang
  • Shuai Yu
Article

Abstract

A hydroponic experiment was carried out to investigate possible hormetic response induced by cadmium (Cd) in a potential hyperaccumulator-Lonicera japonica Thunb. The results showed that Cd at low concentrations induced a significant increase in plant growth, leaf water content and content of photosynthetic pigments in L. japonica, but decreased them at high concentrations, displayed inverted U-shaped dose response curves, confirming a typical biphasic hormetic response. The U-shaped dose response curves were displayed in malondialdehyde (MDA) and electrolyte leakage in leaves at low doses of Cd, indicating reduce oxidative stress and toxic effect. The increase of superoxide dismutase (SOD) and catalase (CAT) activities was observed along with the increased Cd concentration, indicative of increase in anti-oxidative capacity that ensures redox homeostasis is maintained. After 28 days exposure to 10 mg L−1 Cd, stem and leaf Cd concentrations reached 502.96 ± 28.90 and 103.22 ± 5.62 mg kg−1 DW, respectively and the plant had high bioaccumulation coefficient (BC) and translocation factor (TF′). Moreover, the maximum TF value was found at 2.5 mg L−1 Cd treatment, implying that low Cd treatment improved the ability to transfer Cd from medium via roots to aerial structures. Taking together, L. japonica could be considered as a new plant to investigate the underlying mechanisms of hormesis and Cd tolerance. Our results suggest that hormetic effects should be taken into consideration in phytoremediation of Cd-contaminated soil.

Keywords

Lonicera japonica Thunb Cadmium Hormesis Phytoremediation Oxidative stress 

Notes

Acknowledgments

The authors are very thankful to Dr. Dali Tao, for his help in improving the manuscript. This work was funded by the National Science and Technology Pillar Program (2012BAC05B05) and the major National Science and Technology project “Water Pollution Control and Management” (2012ZX07202008) of China.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Lian Jia
    • 1
    • 2
  • Xingyuan He
    • 1
  • Wei Chen
    • 1
  • Zhouli Liu
    • 1
  • Yanqing Huang
    • 1
    • 3
  • Shuai Yu
    • 1
  1. 1.State Key Laboratory of Forest and Soil EcologyInstitute of Applied Ecology, Chinese Academy of SciencesShenyangPeople’s Republic of China
  2. 2.Graduate University of Chinese Academy of SciencesBeijingPeople’s Republic of China
  3. 3.Shenyang Arboretum, Institute of Applied Ecology, Chinese Academy of SciencesShenyangPeople’s Republic of China

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