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| Effect of Silicon on Accumulation and Chemical Forms of Cadmium，and Physiological Characterization in Different Varieties of Capsicum annuum L. |
| LIU Ji-zhen1, XU Wei-hong2*, WANG Hui-xian2, ZHANG Hai-bo2, CHEN Gui-qing2, ZHANG Xiao-jing2, ZHANG Jin-zhong2, ZHOU Xin-bin2, LI Zhen-lun2, XIONG Zhi-ting3 |
| 1Institute of Vegetables and Flowers, Chongqing Academy of Agriculture Science, Chongqing 401329, China; 2College of Resources and Environmental Sciences, Southwest University, Chongqing 400716, China; 3College of Resources and Environmental Sciences, Wuhan University, Wuhan 430079, Hubei, China |
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Abstract Pot experiments were carried out to investigate the influence of organo and inorgano silicon on the plant growth，activities of antioxidant enzymes，accumulation and chemical forms of cadmium（Cd）in different varieties of Capsicum annuum L. when exposed to Cd（10 mg?kg-1）. The results showed that the fruit dry weights of‘Shinongchaotianjiao’increased by 28.1 % and 11.4 % in the presence of organo and inorgano silicon, when exposed to Cd. While the fruit dry weight of‘Yanjiao425’decreased by 32.3 % and 55.1 % compared to the control. Activities of catalase（CAT）and peroxidase（POD）were increased by silicon（Si）. The fruit cadmium chemical forms in 2 varieties of Capsicum annuum L. were in order of FNaCl>FHAC>FE>FHCl>FW>Fr. The total extractable Cd, ethanol- extractable Cd, NaCl-extractable Cd in fruit of‘Shinongchaotianjiao’obviously decreased by Si compared to the control, while the total extractable Cd, NaCl-extractable Cd and acetic acid-extractable Cd in fruit of‘Yanjiao425’increased. The cadmium accumulations of Capsicum annuum L. were in order of stew＞roots or leaf＞fruit. The fruit Cd accumulations in 2 varieties of Capsicum annuum L. obviously decreased by 19.1 % and 23.3 %, 13.4 % and 26.1 % in the presence of organo and inorgano silicon, when exposed to Cd. The cadmium accumulations in Capsicum annuum L. fruit were in order of‘Yanjiao425’＞‘Shinongchaotianjiao’.
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Received: 04 December 2010
Published: 31 March 2011
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