?-Pinene moderates Cr(VI) phytotoxicity by quenching reactive oxygen species and altering antioxidant machinery in maize
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Date
2019
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Springer Verlag
Abstract
We examined the possible role of monoterpene ?-pinene in providing protection against Cr(VI) toxicity in maize (Zea mays). Treatment with β-pinene (10 μM) significantly alleviated Cr(VI) accumulation and recuperated Cr(VI) caused decline in root and coleoptile growth in maize. ?-Pinene addition caused a decline in Cr(VI)-induced accumulation of superoxide anion, hydroxyl ion, hydrogen peroxide and confirmed by in-situ detection of ROS using histochemical localization. It suggested that the ?-pinene quenches/neutralizes enhanced ROS generated under Cr(VI) exposure. ?-Pinene also reduced Cr(VI)-induced electrolyte leakage, thereby suggesting its role in membrane stabilization. Further, ?-pinene regulated the activity of scavenging enzymes, thereby suggesting a role in modulating Cr(VI)-induced oxidative damage. In conclusion, our results suggest that the addition of ?-pinene has a protective role against Cr(VI) stress and provides resistance to maize against Cr(VI) toxicity.
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Keywords
Free radicals, Hexavalent chromium, Monoterpenes, Oxidative damage, Stress amelioration