Phenolic Compounds and Antioxidant Ability Responses to Experimental Free-Air Ozone Exposure in Two Wheat Cultivars
2014
Wang, Junli | Zhu, Jianguo | Zeng, Qing | Liu, Gang
Effects of elevated ozone concentrations [O₃] on two wheat (Triticum aestivum L.) cultivars [Yangmai16 (Y16) and Yannong19 (Y19)] were investigated to determine the different metabolic mechanisms of phenolic compounds under O₃-FACE (free-air controlled enrichment) condition. This study specifically investigated changes of phenolic compounds content, secondary metabolism related enzymes activities, lipid peroxidation extent and reactive oxygen species (ROS) content in the leaves of two wheat cultivars. Results indicated that elevated [O₃] (1.5 × ambient [O₃]) induced different regulation mechanisms of secondary metabolism in different wheat cultivars. Lipid peroxidation and ROS content increased under O₃ stress, and these results were more pronounced in the leaves of Y19 than in those of Y16, suggesting that Y19 is more sensitive to O₃ than Y16.
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