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以巨峰、玫瑰香、龙眼和泽香4个葡萄品种一年生扦插苗为试材,研究了氯化镉(CdCl2)处理后葡萄根系线粒体过氧化氢(H2O2)、膜通透性转换孔(MPTP)、膜电位(Δψ)、细胞色素C(Cytc)及根系活力的变化.结果表明:4个葡萄品种经0.5mmol·L-1的CdCl2处理后,根系线粒体H2O2含量上升,MPTP开放程度增大,Δψ降低,Cytc含量下降,根系活力明显降低;其中,H2O2含量和Cytc含量由高到低的顺序为:巨峰>泽香>玫瑰香>龙眼,而根系活力、MPTP和Δψ由高到低的顺序为:龙眼>玫瑰香>泽香>巨峰.表明巨峰葡萄根系活力比其他品种更易受到CdCl2的影响,而龙眼葡萄根系活力在4个品种中受CdCl2的影响最小.
The annual cuttings of four grape varieties, Kyoho, Rosemary, Longan and Zexu, were used as experimental materials to study the effects of cadmium chloride (CdCl2) on mitochondrial hydrogen peroxide (H2O2), membrane permeability transition pore (MPTP) , Membrane potential (Δψ), cytochrome C (Cytc) and root activity.The results showed that after treated with 0.5 mmol·L -1 CdCl2, the content of H2O2 in root increased, the MPTP open degree increased, Δψ decreased, Cytc decreased, and root activity decreased significantly. Among them, H2O2 content and Cytc content decreased from high to low in the order of Kyoho> Zexu> Rosemary> longan, while root activity, MPTP and Δψ descending order The results showed that root activity of Kyoho grape was more affected by CdCl2 than that of other varieties, while the root activity of longan grape had the least influence on CdCl2 in four varieties.