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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Contribution of a plasma membrane redox system to the superoxide production by wheat root cells
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Contribution of a plasma membrane redox system to the superoxide production by wheat root cells

机译：质膜氧化还原系统对小麦根细胞产生超氧化物的贡献

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Wound stress activated wheat root cells to produce oxygen radicals. The production was accompanied by an increased permeability for potassium ions and a depolarization of the plasma membrane. Various electron donors, such as the nonpenetrating donor potassium ferrocyanide as well as NADH and NADPH, caused the: amplification of superoxide production by root cells. The O-2.(.-)-generating system in wheat root cells was found to be consider ably sensitive to diphenylene iodonium, which is generally considered as a suicide inhibitor of neutrophil NADPH oxidase, and to other inhibitors of flavoprotein activity, chlorpromazine and quinine. The xenobiotic compound amidopyrine caused activation of the O-2(-)-generating system, which was depressed by DPI. The O-2(-)-generating system in root cells was shown to be significantly dependent on calcium content. Calcium loading of the root cells induced a powerful increase of the superoxide release. Data obtained indicate that superoxide generation is one of the early events of the wound stress response. Redox systems of the plasma membrane may be involved in the superoxide production in response to wound stress and detoxification of xenobiotic compounds in root cells. [References: 33]
机译：伤口压力激活了小麦根细胞产生氧自由基。产生伴随着钾离子渗透性的增加和质膜的去极化。各种电子供体，例如非穿透性供体亚铁氰化钾以及NADH和NADPH，引起：根细胞超氧化物产生的放大。发现在小麦根细胞中产生O-2。（.-）的系统对二苯碘鎓（通常被认为是中性粒细胞NADPH氧化酶的自杀抑制剂）以及对其他黄素活性抑制剂，氯丙嗪和氯霉素具有敏感性。奎宁。外源性化合物氨基am比林引起O-2（-）生成系统的激活，而DPI抑制了该系统的激活。根细胞中产生O-2（-）的系统显示出显着依赖于钙含量。根细胞的钙负荷诱导了超氧化物释放的强烈增加。获得的数据表明超氧化物的产生是伤口应激反应的早期事件之一。质膜的氧化还原系统可响应伤口压力和根细胞中异生物化合物的解毒而参与超氧化物的产生。 [参考：33]

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