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Cadmium accumulation and tolerance of two castor cultivars in relation to antioxidant systems
Zhang, Hanzhi(张晗芝); Guo, Qingjun; Yang, Junxing; Chen, Tongbin; Zhu, Guangxu; Peters, Marc; Wei, Rongfei; Tian, Liyan; Wang, Chunyu; Tan, Deyun; Ma, Jie; Wang, Gangming; Wan, Yingxin
2014
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
Volume26Issue:10Pages:2048-2055
Corresponding AuthorGuo, QJ
Abstract

To investigate the effects of Cd on tolerance and antioxidant activities of castor, two different castor (Ricinus communis L.) cultivars (Zibo No. 5 and Zibo No. 8) were used for a hydroponic experiment (0, 1 and 2 mg/L Cd) and a pot experiment using Cd-contaminated soil (34 mg/kg) with the addition of ethylenedinitrilotetraacetic acid (EDTA). The results indicated that there were significant differences between the two cultivars with respect to Cd uptake in shoots (113-248 mg/kg for Zibo No. 5 and 130-288 mg/kg Zibo No. 8), biomass tolerance indexes (64.9%-74.6% for Zibo No. 5 and 80.1%-90.9% for Zibo No. 8) in the hydroponic experiment and survival rates (0% for Zibo No. 5 and 100% for Zibo No. 8) determined by the addition of EDTA in the pot experiment, suggesting that Zibo No. 8 has higher tolerance than Zibo No. 5. Moreover, the castor cultivars have low bioconcentration factors (4.80% for Zibo No. 5 and 5.43% for Zibo No. 8) and low translocation factors (<1%). Consequently, Zibo No. 8 can participate in Cd phytostabilization in highly Cd-polluted areas. The results indicated that glutathione (GSH) as a non-enzymatic antioxidant, and antioxidant enzymes including superoxide dismutase (SOD), catalase (CAT) and guaiacol peroxidase (GPX), were cultivar- and dose-dependent. The higher tolerance of Zibo No. 8 compared with Zibo No. 5 can be attributed to the higher GSH levels in the root and higher GPX activity in the leaf. (C) 2014 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.

KeywordCadmium Castor Antioxidant Activity Tolerance Phytoremediation
Indexed BySCI
Funding OrganizationOne Hundred Talents Program of the Chinese Academy of Sciences;973 Program 2014CB238906;863 Program 2013AA06A211-2;National Natural Science Foundation of China 41201312
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/29291
Collection研究生部
Recommended Citation
GB/T 7714
Zhang, Hanzhi,Guo, Qingjun,Yang, Junxing,et al. Cadmium accumulation and tolerance of two castor cultivars in relation to antioxidant systems[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2014,26(10):2048-2055.
APA Zhang, Hanzhi.,Guo, Qingjun.,Yang, Junxing.,Chen, Tongbin.,Zhu, Guangxu.,...&Wan, Yingxin.(2014).Cadmium accumulation and tolerance of two castor cultivars in relation to antioxidant systems.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,26(10),2048-2055.
MLA Zhang, Hanzhi,et al."Cadmium accumulation and tolerance of two castor cultivars in relation to antioxidant systems".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 26.10(2014):2048-2055.
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