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[Effects of CdCl2 on grape root mitochondrial characteristics and root activity].

Taking the one-year cutting-seedlings of four grape cultivars (Kyoho, Muscat Hamburg, Long Yan, and Ze Xiang) as test materials, their root mitochondrial hydrogen peroxide (H2O2) content, membrane permeability transition pore (MPTP), membrane potential (Deltapsi), cytochrome C (Cyt c) content, and root activity were measured under effects of CdCl2. For all test grape cultivars, the root mitochondrial H2O2 content and MPTP increased, but the Deltapsi, Cyt c content, and root activity decreased after treated with 0.5 mmol CdCl2 x L(-1). The mitochondrial H2O2 content and Cyt c content were in the sequence of Kyoho > Ze Xiang > Muscat Hamburg > Long Yan, while the root activity, MPTP, and Deltapsi were in adverse, i.e., Long Yan > Muscat Hamburg > Ze Xiang > Kyoho. Among the test grape cultivars, the root activity of Kyoho was easier to be inhibited under Cd stress, while that of Long Yan was least affected by CdCl2.