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Cadmium Toxicity and Alleviating Effects of Exogenous Salicylic Acid in Iris hexagona

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Abstract

Cadmium (Cd) toxictity and possible role of salicylic acid (SA) in alleviating Cd-induced toxicity were investigated on ornamental hydrophyte Iris hexagona. Compared to the control, treatments with 100 and 500 µM Cd for 7 days significantly decreased dry weight, the contents of chlorophyll, photosynthetic parameters, and increased the content of thiobarbituric acid reactive substance. Pretreatment of the roots of I. hexagona seedlings with 1 µM SA before Cd exposure may increase dry weight, photosynthetic rate, activities of antioxidant enzymes, improve the cell ultrastructure and protect plants from Cd-induced oxidative stress damage. However, SA pretreatment had no significant effect on Cd concentrations in the leaves and roots. It is suggested that SA-induced Cd tolerances in I. hexagona are likely associated with increases in antioxidant enzyme activities and vacuolar compartmentation, rather than Cd uptake.

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Acknowledgments

The work described here was supported by the National Natural Science Foundation of China (41030529), and the Social Development Foundation of Jiangsu Province (BE2011781).

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Authors and Affiliations

  1. National Joint Local Engineering Research Center for Rural Land Resources Use and Consolidation, College of Life Sciences, Nanjing Agriculture University, Nanjing, 210095, China

    Ying Han, Yahua Chen & Zhenguo Shen

  2. Suzhou Polytechnic Institute of Agriculture, Suzhou, 215008, China

    Ying Han

  3. College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, 225009, China

    Gang Chen

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  1. Ying Han
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  2. Gang Chen
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  3. Yahua Chen
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  4. Zhenguo Shen
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Correspondence to Zhenguo Shen.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Informed consent was obtained from all individual participants included in the study.

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Han, Y., Chen, G., Chen, Y. et al. Cadmium Toxicity and Alleviating Effects of Exogenous Salicylic Acid in Iris hexagona . Bull Environ Contam Toxicol 95, 796–802 (2015). https://doi.org/10.1007/s00128-015-1640-3

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  • DOI: https://doi.org/10.1007/s00128-015-1640-3

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