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• W2053337894 abstract "The relation between Al-toxicity and oxidative stress was studied for two inbred lines of maize (Zea mays L.), Cat100-6 (Al-tolerant) and S1587-17 (Al-sensitive). Peroxidase (PX), catalase (CAT) and superoxide dismutase (SOD) activities were determined in root tips of both lines, exposed to different Al(3+) concentrations and times of exposure. No increases were observed in CAT activities in either line, although SOD and PX were found to be 1.7 and 2.0 times greater than initial levels, respectively, in sensitive maize treated with 36 microM of Al(3+) for 48 h. The results indicate that Al(3+) induces the dose- and time dependent formation of reactive oxygen species (ROS) and subsequent protein oxidation in S1587-17, although not in Cat100-6. After exposure to 36 microM of Al(3+) for 48 h, the formation of 20+/-2 nmol of carbonyls per mg of protein was observed in S1587-17. The onset of protein oxidation took place after the drop of the relative root growth observed in the sensitive line, indicating that oxidative stress is not the primary cause of root growth inhibition. The presence of Al(3+) did not induce lipid peroxidation in either lines, contrasting with the observations in other species. These results, in conjunction with the data presented in the literature, indicate that oxidative stress caused by Al may harm several components of the cell, depending on the plant species. Moreover, Al(3+) treatment and oxidative stress in the sensitive maize line induced cell death in root tip cells, an event revealed by the high chromatin fragmentation detected by TUNEL analysis." @default.
• W2053337894 created "2016-06-24" @default.
• W2053337894 creator A5090374772 @default.
• W2053337894 date "2003-01-01" @default.
• W2053337894 modified "2023-10-04" @default.
• W2053337894 title "Aluminum-induced oxidative stress in maize" @default.
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• W2053337894 doi "https://doi.org/10.1016/s0031-9422(02)00491-0" @default.
• W2053337894 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/12482454" @default.
• W2053337894 hasPublicationYear "2003" @default.
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