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Oxidative damage and cell-programmed death induced in Zea mays L. by allelochemical stress



Oxidative damage and cell-programmed death induced in Zea mays L. by allelochemical stress



Ecotoxicology 24(4): 926-937



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.

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Accession: 058488711

Download citation: RISBibTeXText

PMID: 25736610

DOI: 10.1007/s10646-015-1435-7


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