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草业学报 ›› 2011, Vol. 20 ›› Issue (5): 102-110.

• 研究论文 • 上一篇    下一篇

金霉素和其代谢物胁迫对小白菜幼苗生长和抗氧化酶活性及累积效应的影响

魏瑞成1, 裴燕2, 政晓丽3, 朱旭博3, 陈明1, 王冉1*   

  1. 1.江苏省畜禽产品安全性研究重点实验室,农业部食用农产品安全监控重点开放实验室,江苏省食品质量安全重点实验室,江苏 南京 210014;
    2.扬州大学动物科学与技术学院,江苏 扬州 225009;
    3.扬州大学植物保护学院,江苏 扬州 225009
  • 出版日期:2011-10-20 发布日期:2011-10-20
  • 通讯作者: E-mail:wangran@jaas.ac.cn
  • 作者简介:魏瑞成(1979-),男,河南商丘人,助研,硕士。
  • 基金资助:
    江苏省农业科技自主创新资金(CX(09)618)和环保公益性行业科研专项(200809092A)资助。

Effects of chlortetracycline and 4-epi-chlortetracycline stress on seedling growth, antioxidant enzyme activities and accumulation in pakchoi

WEI Rui-cheng1, PEI Yan2, ZHENG Xiao-li3, ZHU Xu-bo3, CHEN Ming1, WANG Ran1   

  1. 1.Jiangsu Provincial Key Laboratory of Animal-Derived Food Safety, Key Open Laboratory of Edible Agricultural Products Safe Monitoring and Control, Ministry of Agriculture, Key Lab of Food Quality and Safety of Jiangsu Province, Nanjing 210014, China;
    2.College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China;
    3.College of Plant Protection, Yangzhou University, Yangzhou 225009, China
  • Online:2011-10-20 Published:2011-10-20

摘要: 通过水培实验研究了在1,10和30 mg/L浓度下,金霉素(chlortetracycline, CTC)和其代谢物差向金霉素(4-epi-chlortetracycline, ECTC)胁迫对小白菜种子的萌发、幼苗的早期生长、幼苗中抗氧化酶系统活性的变化以及CTC和ECTC积累进行了研究。结果表明,根长较其他指标对CTC和ECTC生态毒性实验更为敏感,小白菜体内SOD、POD和CAT活性被CTC诱导,活性逐渐升高,其中SOD、POD活性均高于对照,低浓度ECTC促进了SOD、POD和CAT活性的升高,高浓度时POD和CAT活性被抑制,且随浓度升高,抑制作用加强,表明小白菜抗CTC胁迫的能力强于ECTC。CTC和ECTC能在小白菜地上部分积累,处理浓度越高,吸收和积累量越多,其中CTC被积累作用强于ECTC。

Abstract: The effects of different concentrations of chlortetracycline (CTC) and 4-epi-chlortetracycline (ECTC) (1, 10, 30 mg/L) on seed germination, growth, antioxidant enzyme systems, CTC and ECTC accumulation in pakchoi (Brassica campestris ssp. chinensis) seedlings were investigated using a water culture method. The results indicated that root elongation could be recommended as a sensitivity indicator to assess eco-toxicity of CTC and ECTC compared with other targets. The activities of SOD, POD and CAT of pakchoi were enhanced with increasing CTC concentration and the activities of POD and CAT were always higher than that of the control group. Under the same conditions, the SOD, POD and CAT activities were enhanced at a low concentration of ECTC but the latter two were inhibited at high ECTC concentration. CTC and ECTC can accumulate in pakchoi. When the concentration of CTC and ECTC was increased, the contents of CTC and ECTC accumulated in seedlings increased. The experiments revealed that the abilities of pakchoi to accumulate CTC were stronger than for ECTC and the stress was correspondingly greater.

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