文献类型：期刊文献

英文题名：Cadmium accumulation and tolerance of two castor cultivars in relation to antioxidant systems

作者：Zhang, Hanzhi[1,2];Guo, Qingjun[1];Yang, Junxing[1];Chen, Tongbin[1];Zhu, Guangxu[1,2];Peters, Marc[1];Wei, Rongfei[1,2];Tian, Liyan[1,2];Wang, Chunyu[1,2];Tan, Deyun[3];Ma, Jie[1,5];Wang, Gangming[3];Wan, Yingxin[4]

第一作者：Zhang, Hanzhi

通讯作者：Guo, QJ[1]

机构：[1]Chinese Acad Sci, Inst Geog Sci & Nat Resources, Ctr Environm Remediat, Beijing 100101, Peoples R China;[2]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[3]Zibo Acad Agr Sci, Zibo 255033, Peoples R China;[4]Beijing Union Univ, Coll Appl Arts & Sci, Beijing 100191, Peoples R China;[5]China Univ Geosci, Beijing 100083, Peoples R China

第一机构：Chinese Acad Sci, Inst Geog Sci & Nat Resources, Ctr Environm Remediat, Beijing 100101, Peoples R China

通讯机构：[1]corresponding author), Chinese Acad Sci, Inst Geog Sci & Nat Resources, Ctr Environm Remediat, Beijing 100101, Peoples R China.

年份：2014

卷号：26

期号：10

起止页码：2048-2055

外文期刊名：JOURNAL OF ENVIRONMENTAL SCIENCES

收录：;EI(收录号：20144900275219);Scopus(收录号：2-s2.0-84912070767);WOS:【SCI-EXPANDED(收录号:WOS:000343780700012)】；

基金：This work was supported by the One Hundred Talents Program of the Chinese Academy of Sciences (Guo Q,J. 2010), 973 Program (No. 2014CB238906), 863 Program (No. 2013AA06A211-2), and National Natural Science Foundation of China (No. 41201312). The authors would like to thank Zibo Academy of Agricultural Sciences for providing castor seeds, and also thank Undergraduate Zhao Bo (College of Applied Arts and Science of Beijing Union University) for equipment assistance.

语种：英文

外文关键词：Cadmium; Castor; Antioxidant activity; Tolerance; Phytoremediation

摘要：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.