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Oxidative stress triggered by aluminum in plant roots

机译:铝在植物根系中引发的氧化胁迫

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摘要

Aluminum (Al) is a major growth-limiting factor for plants in acid soils. The primary site of Al accumulation and toxicity is the root meristem, and the inhibition of root elongation is the most sensitive response to Al. Al cannot catalyze redox reactions but triggers lipid peroxidation and reactive oxygen species (ROS) production in roots. Furthermore, Al causes respiration inhibition and ATP depletion. Comparative studies of Al toxicity in roots with that in cultured plant cells suggest that Al causes dysfunction and ROS production in mitochondria, and that ROS production, but not lipid peroxidation, seems to be a determining factor of root-elongation inhibition by Al.
机译:铝(Al)是酸性土壤中植物的主要生长限制因子。铝的积累和毒性的主要部位是根分生组织,而根伸长的抑制是对铝最敏感的反应。铝不能催化氧化还原反应,但会在根部触发脂质过氧化和活性氧(ROS)的产生。此外,Al引起呼吸抑制和ATP耗竭。根与培养的植物细胞中铝的毒性的比较研究表明,铝会导致线粒体功能障碍和ROS生成,而ROS生成而非脂质过氧化似乎是Al抑制根伸长的决定因素。

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