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Ecotoxicology

, Volume 20, Issue 4, pp 760–769 | Cite as

Magnetic field can alleviate toxicological effect induced by cadmium in mungbean seedlings

  • Yi-ping ChenEmail author
  • Ran Li
  • Jun-Min He
Article

Abstract

To alleviate toxicological effect induced by cadmium in mungbean seedlings, seeds were divided into four groups: The controls groups (CK, without treatment), magnetic field treated groups (MF), cadmium treated groups (CS), and magnetic field treated followed by cadmium treated groups (MF + CS).The results showed: (i) Compared with the controls, cadmium stress resulted in enhancing in the concentration of malondialdehyde, H2O2 and O2−, and the conductivity of electrolyte leakage while decreasing in the nitrice oxide synthase (NOS) activity, the concentration of nitrice oxide (NO), chlorophyll and total carbon and nitrogen, the net photosynthetic rate, the stomatal conductance, the transpiration rate, the water use efficiency, the lateral number and seedlings growth except for intercellular CO2 concentration increase. However, the seedlings treated with 600 mT magnetic field followed by cadmium stress the concentration of malondialdehyde, H2O2 and O2−, and the conductivity of electrolyte leakage decreased, while the above mentioned NO concentration, NOS activity, photosynthesis and growth parameters increased compared to cadmium stress alone. (ii) Compared with the cadmium stress (CS), the seedling growth were inhibited when the seeds were treated with NO scavenger (hemoglobin, HB) and inhibition of NO generating enzyme (sodium tungstate, ST), conversely, the seedling growth were improved by the NO donor sodium nitroprusside (SNP) and CaCl2. In the case of the HB and ST treatment followed by magnetic field and then the seedling subjected to CS, the seedlings growth was better than that of hemoglobin (HB) followed by CS and ST followed by CS. The seeds were treated with SNP and CaCl2 followed by MF, and then subjected to CS, the seedlings growth were better than that of SNP followed by CS, and CaCl2 followed by CS. These results suggested that magnetic field compensates for the toxicological effects of cadmium exposure are related to NO signal.

Keywords

Mungbean Magnetic field NO Signaling Ca Signaling Cd Stress Photosynthesis 

Abbreviations

MDA

Malondialdehyde

TBA

Thiobarbituric acid

NO

Nitrice oxide

NOS

Nitrice oxide synthase

Pn

Net photosynthetic rate

Gs

Stomatal conductance

Tr

Transpiration rate

Ci

Intercellular CO2 concentration

EDTA

Ethylene diamine tetraacetic acid

CK

Without any treatment

MF

Magnetic field treatment

CS

Cadmium stress

Notes

Acknowledgments

This work was supported by the West China Star of CAS (2007YB04) and the SKLLQG Sciences Foundation of China (0705).

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.SKLLQGInstitute of Earth Environment, Chinese Academy of ScienceXi’anChina
  2. 2.College of Life ScienceShaanxi Normal UniversityXi’anChina

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