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镉(Cd)是非必需的有毒元素,是农业环境和农产品的重要污染物,因此,Cd的毒性效应已成为国内外研究的热点。实验研究手段主要有滤纸法、水培法、土壤栽培,以发芽率、叶绿素含量、生物量为毒理学指标探讨Cd胁迫对油菜、白菜和萝卜的毒性效应。采用SPSS进行统计分析得出,植物生长指标与对照相比差异明显,且呈现明显的剂量-效应关系,其中叶绿素和根长变化幅度较大,表明这两种指标较为敏感,可以作为生物标志物诊断Cd毒性。
Cadmium (Cd) is a non-essential toxic element and is an important pollutant in agricultural environment and agricultural products. Therefore, the toxic effect of Cd has become a hot spot at home and abroad. The main experimental methods are filter paper method, hydroponics method and soil culture method. The toxic effects of Cd stress on rape, cabbage and radish were studied with germination rate, chlorophyll content and biomass as toxicological indexes. Statistical analysis using SPSS showed that the difference of plant growth index was significant compared with the control, and showed a significant dose-response relationship, of which chlorophyll and root length changes were relatively large, indicating that these two indexes are sensitive and can be used as biomarkers Diagnosing Cd toxicity.