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首页> 外文期刊>Ecotoxicology >Oxidative damage and cell-programmed death induced in Zea mays L. by allelochemical stress
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Oxidative damage and cell-programmed death induced in Zea mays L. by allelochemical stress

机译：化感作用在玉米中诱导的氧化损伤和细胞程序性死亡

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摘要

The allelochemical stress on Zea mays was analyzed by using walnut husk washing waters (WHWW), a by-product of Juglans regia post-harvest process, which possesses strong allelopathic potential and phytotoxic effects. Oxidative damage and cell-programmed death were induced by WHWW in roots of maize seedlings. Treatment induced ROS burst, with excess of H2O2 content. Enzymatic activities of catalase were strongly increased during the first hours of exposure. The excess in malonildialdehyde following exposure to WHWW confirmed that oxidative stress severely damaged maize roots. Membrane alteration caused a decrease in NADPH oxidase activity along with DNA damage as confirmed by DNA laddering. The DNA instability was also assessed through sequence-related amplified polymorphism assay, thus suggesting the danger of walnut processing by-product and focusing the attention on the necessity of an efficient treatment of WHWW.
机译：利用核桃果皮采后过程的副产物核桃皮洗净水（WHWW）分析了对玉米的化感胁迫，该核桃皮具有很强的化感作用和植物毒性作用。 WHWW诱导了玉米幼苗根系的氧化损伤和细胞程序性死亡。处理引起的ROS爆炸，并带有过量的H2O2。在接触的最初几个小时内，过氧化氢酶的酶活性大大增加。暴露于WHWW后的丙二醛过量表明氧化应激严重破坏了玉米根系。 DNA梯形证实，膜的改变引起NADPH氧化酶活性的下降以及DNA损伤。还通过序列相关的扩增多态性分析评估了DNA的不稳定性，从而提示了核桃加工副产物的危险，并将注意力集中在有效处理WHWW的必要性上。

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