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水溶性有机物对绿麦隆胁迫下小麦幼苗生物利用性和毒性的影响

宋宁慧 单正军

宋宁慧, 单正军. 水溶性有机物对绿麦隆胁迫下小麦幼苗生物利用性和毒性的影响[J]. 环境科学研究, 2012, 25(4): 460-466.
引用本文: 宋宁慧, 单正军. 水溶性有机物对绿麦隆胁迫下小麦幼苗生物利用性和毒性的影响[J]. 环境科学研究, 2012, 25(4): 460-466.
SONG Ning-hui, SHAN Zheng-jun. Effects of Dissolved Organic Matter on Bioavailability and Toxicity of Chlorotoluron to Wheat[J]. Research of Environmental Sciences, 2012, 25(4): 460-466.
Citation: SONG Ning-hui, SHAN Zheng-jun. Effects of Dissolved Organic Matter on Bioavailability and Toxicity of Chlorotoluron to Wheat[J]. Research of Environmental Sciences, 2012, 25(4): 460-466.

水溶性有机物对绿麦隆胁迫下小麦幼苗生物利用性和毒性的影响

基金项目: 国家自然科学基金项目(41101307)

Effects of Dissolved Organic Matter on Bioavailability and Toxicity of Chlorotoluron to Wheat

  • 摘要: 研究了在2种来源的DOM(水溶性有机物)和绿麦隆作用下,小麦幼苗在不同培养时间(4和10 d)组织累积量和抗氧化系统的响应,探讨了小麦幼苗在DOM作用下对绿麦隆胁迫的毒性响应影响及机制. 结果表明:在不同的培养期内,绿麦隆均抑制了小麦幼苗的生长,而2种不同来源的DOM均缓解了绿麦隆对植株的毒性. DOM的施加使绿麦隆胁迫下小麦叶和根中的丙二醛(MDA)含量降低,同时绿麦隆诱导的超氧化物歧化酶(SOD)和过氧化氢酶(CAT)的活力也有所降低,然而过氧化物酶(POD)和谷胱甘肽巯基转移酶(GST)的活性却有一定程度的增高. 使用RT-PCR半定量分析方法对SOD和GST的酶活性变化进行了分析,以确证DOM缓解绿麦隆对小麦幼苗的毒性调节机制.

     

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  • 刊出日期:  2012-04-25

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