【摘要】 植物自毒现象在自然和农业生态系统中广泛存在。该研究针对植物自毒作用强弱与自毒物质浓度相关的低促高抑赫米斯(Hormesis)特性,在An-Johnson-Lovett Hormesis模型中引入生态限制因子米式(Mitscherlich)模型,建立了自毒物质作用的剂量/自毒效应规律的机理数学模型。模型的演示与文献的报道结果一致,用已经发表的多种植物的自毒研究数据进行检验显示很强的拟合效果,说明以生态限制因子为核心建立的自毒模型不仅从植物生长的生物生态学属性上进一步揭示了自毒作用随自毒物质浓度变化的效应规律,同时在应用上具普遍性,这为今后更深入地研究自毒作用提供了一理论平台。更多还原

【Abstract】 Plant autotoxicity widely exists in natural and agricultural ecosystems.Based on the hormetic dose responses of plants to autotoxins,this study introduced the Mitscherlich limiting-factor model into the An-Johnson-Lovett hormesis model and established a new autotoxicity dose/response model.Illustration of the model is in a good agreement with the literature.It demonstrates that the new model has better described the mechanisms of autotoxic phenomenon from the point view of ecological limiting-factor.The new model may be a good tool for analysing autotoxicity data as well as a platform for further research on plant autotoxicity.更多还原