Phytoextraction of cadmium and physiological changes in Solanum nigrum as a novel cadmium hyperaccumulator

Phytoextraction of cadmium and physiological changes in Solanum nigrum as a novel cadmium... It is still difficult to fully understand the physiological, biochemical, and molecular mechanisms involved in metal hyperaccumulation and how plants adjust to an adverse environment. Solanum nigrum L. is a novel Cd-hyperaccumulator, which antioxidant defense and photosynthetic CO2 fixation were investigated in this study. The results showed that the elevated heavy metal concentration, inhibiting S. nigrum growth, was accompanied by a decrease in the photosynthetic CO2 fixation. The presence of heavy metal in soil led to disturbances in the antioxidant responses, especially in superoxide dismutase, malondialdehyde, phytochelatins, and total acid-soluble thiols, which indices in S. nigrum were significantly correlated with the elevated heavy metal concentration. Whereas peroxidase activity in S. nigrum showed a slight difference and irregular change, reduced glutathione significantly decreased with increasing culturing time and elevated Cd concentration. Thus, the manipulation of antioxidant enzyme activities increases tolerance, thereby potentially increasing the uptake capacity of an organism. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Phytoextraction of cadmium and physiological changes in Solanum nigrum as a novel cadmium hyperaccumulator

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Publisher
Springer Journals
Copyright
Copyright © 2010 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Plant Sciences ; Plant Physiology
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1134/S1021443710040072
Publisher site
See Article on Publisher Site

Abstract

It is still difficult to fully understand the physiological, biochemical, and molecular mechanisms involved in metal hyperaccumulation and how plants adjust to an adverse environment. Solanum nigrum L. is a novel Cd-hyperaccumulator, which antioxidant defense and photosynthetic CO2 fixation were investigated in this study. The results showed that the elevated heavy metal concentration, inhibiting S. nigrum growth, was accompanied by a decrease in the photosynthetic CO2 fixation. The presence of heavy metal in soil led to disturbances in the antioxidant responses, especially in superoxide dismutase, malondialdehyde, phytochelatins, and total acid-soluble thiols, which indices in S. nigrum were significantly correlated with the elevated heavy metal concentration. Whereas peroxidase activity in S. nigrum showed a slight difference and irregular change, reduced glutathione significantly decreased with increasing culturing time and elevated Cd concentration. Thus, the manipulation of antioxidant enzyme activities increases tolerance, thereby potentially increasing the uptake capacity of an organism.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Jul 7, 2010

References

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