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Journal of Nanomaterials
Volume 2014, Article ID 470962, 7 pages
http://dx.doi.org/10.1155/2014/470962
Research Article

Effects of Nanoparticle Hydroxyapatite on Growth and Antioxidant System in Pakchoi (Brassica chinensis L.) from Cadmium-Contaminated Soil

Department of Chemistry, Hanshan Normal University, Chaozhou 521041, China

Received 12 December 2013; Revised 10 February 2014; Accepted 24 February 2014; Published 23 March 2014

Academic Editor: Arun Kumar

Copyright © 2014 Zhangwei Li and Jiaai Huang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The effects of nanoscale particle hydroxyapatite (nHAP) on biomass, Cd uptake, the level of chlorophyll, vitamin C, malondialdehyde (MDA), and the activities of antioxidant enzymes, including SOD, CAT, and POD in pakchoi in Cd-contaminated soil, were evaluated by conducting pot experiment. Results showed that, by application of the 5 g·kg−1, 10 g·kg−1, 20 g·kg−1, and 30 g·kg−1 nHAP in 10 mg·kg−1 Cd-contaminated soil, the biomass of plant increased by 7.97%, 13.21%, 19.53%, and 20.23%, respectively. In addition, the reduction of Cd in shoots was 27.12%, 44.20%, 50.91%, and 62.36% compared to control samples. It was found that the supplement of the nHAP can increase the level of chlorophyll and vitamin C and decrease the level of MDA in plant shoots. Furthermore, the increment activities of SOD, CAT, and POD can be observed after addition of nHAP in Cd-contaminated soil. The results confirmed that nHAP can be applied to reduce the plant uptake of Cd and resist the Cd stress in the plant in Cd-contaminated soil.