Regulatory Effects of Elevated Carbon Dioxide on Growth and Biochemical Responses to Ozone Stress in Chinese Pine (Pinus tabulaeformis Carr.)

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• 作者：Zhouli Liu ; Wei Chen ; Xingyuan He ; Shilei Fu&#8230
• 关键词：Carbon dioxide ; Ozone ; Response ; Pinus tabulaeformis Carr.
• 刊名：Bulletin of Environmental Contamination and Toxicology
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：97
• 期：6
• 页码：793-797
• 全文大小：
• 刊物主题：Pollution, general; Environmental Health; Ecotoxicology; Soil Science & Conservation; Environmental Chemistry; Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution;
• 出版者：Springer US
• ISSN：1432-0800
• 卷排序：97

文摘

This study examined whether carbon dioxide (CO₂) might alleviate ozone (O₃) injury to the dominant coniferous forest species of northern China, Pinus tabulaeformis Carr. After 90 days O₃ exposure, biomass and net photosynthetic rate (Pn) decreased significantly by 24.44 % and 42.89 % compared with the control. A significant increase in malondialdehyde (MDA) was shown, suggesting cell membrane damage and oxidative stress. However, the positive responses of biomass dry weight, antioxidative enzymes and soluble sugar contents under elevated CO₂ alone and the combination of elevated CO₂ and O₃ were observed, indicating that CO₂ could ameliorate O₃-induced injury. The study provided increasing evidence that moderately elevated CO₂ levels may have a beneficial effect on the forest ecosystem to respond to global climate change.