NDLI: Elevated CO$_{2}$ ameliorated oxidative stress induced by elevated O$

Content Provider	Springer Nature Link
Author	Yan, Kun Chen, Wei Zhang, Guoyou Xu, Sheng Liu, Zhouli He, Xingyuan Wang, Lanlan
Copyright Year	2009
Abstract	Using open top chambers, the effects of elevated O$_{3}$ (80 nmol mol$^{−1}$) and elevated CO$_{2}$ (700 μmol mol$^{−1}$), alone and in combination, were studied on young trees of Quercus mongolica. The results showed that elevated O$_{3}$ increased malondialdehyde content and decreased photosynthetic rate after 45 days of exposure, and prolonged exposure (105 days) induced significant increase in electrolyte leakage and reduction of chlorophyll content. All these changes were alleviated by elevated CO$_{2}$, indicating that oxidative stress on cell membrane and photosynthesis was ameliorated. After 45 days of exposure, elevated O$_{3}$ stimulated activities of superoxide dismutase (SOD, EC 1.15.1.1) and ascorbate peroxidase (APX, EC 1.11.1.11), but the stimulation was dampened under elevated CO$_{2}$ exposure. Furthermore, ascorbate (AsA) and total phenolics contents were not higher in the combined gas treatment than those in elevated O$_{3}$ treatment. It indicates that the protective effect of elevated CO$_{2}$ against O$_{3}$ stress was achieved hardly by enhancing ROS scavenging ability after 45 days of exposure. After 105 days of exposure, elevated O$_{3}$ significantly decreased activities of SOD, catalase (CAT, EC 1.11.1.6) and APX and AsA content. Elevated CO$_{2}$ suppressed the O$_{3}$-induced decrease, which could ameliorate the oxidative stress in some extent. In addition, elevated CO$_{2}$ increased total phenolics content in the leaves both under ambient O$_{3}$ and elevated O$_{3}$ exposure, which might contribute to the protection against O$_{3}$-induced oxidative stress as well.
Starting Page	375
Ending Page	385
Page Count	11
File Format	PDF
ISSN	01375881
Journal	Acta Physiologiae Plantarum
Volume Number	32
Issue Number	2
e-ISSN	18611664
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-11-21
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Antioxidative systems CO$_{2}$ O$_{3}$ Oxidative stress Quercus mongolica Agriculture Plant Anatomy/Development Plant Pathology Plant Biochemistry Plant Genetics & Genomics Plant Physiology
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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