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Elevated CO 2 ameliorated oxidative stress induced by elevated O 3 in Quercus mongolica

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 ... Full description

Journal Title: Acta Physiologiae Plantarum 2010, Vol.32(2), pp.375-385
Main Author: Yan, Kun
Other Authors: Chen, Wei , Zhang, Guoyou , Xu, Sheng , Liu, Zhouli , He, Xingyuan , Wang, Lanlan
Format: Electronic Article Electronic Article
Language: English
Subjects:
CO
O
ID: ISSN: 0137-5881 ; E-ISSN: 1861-1664 ; DOI: 10.1007/s11738-009-0415-z
Link: http://dx.doi.org/10.1007/s11738-009-0415-z
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recordid: springer_jour10.1007/s11738-009-0415-z
title: Elevated CO 2 ameliorated oxidative stress induced by elevated O 3 in Quercus mongolica
format: Article
creator:
  • Yan, Kun
  • Chen, Wei
  • Zhang, Guoyou
  • Xu, Sheng
  • Liu, Zhouli
  • He, Xingyuan
  • Wang, Lanlan
subjects:
  • Antioxidative systems
  • CO
  • O
  • Oxidative stress
  • Quercus mongolica
ispartof: Acta Physiologiae Plantarum, 2010, Vol.32(2), pp.375-385
description: 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.
language: eng
source:
identifier: ISSN: 0137-5881 ; E-ISSN: 1861-1664 ; DOI: 10.1007/s11738-009-0415-z
fulltext: fulltext
issn:
  • 1861-1664
  • 18611664
  • 0137-5881
  • 01375881
url: Link


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titleElevated CO 2 ameliorated oxidative stress induced by elevated O 3 in Quercus mongolica
creatorYan, Kun ; Chen, Wei ; Zhang, Guoyou ; Xu, Sheng ; Liu, Zhouli ; He, Xingyuan ; Wang, Lanlan
ispartofActa Physiologiae Plantarum, 2010, Vol.32(2), pp.375-385
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subjectAntioxidative systems ; CO ; O ; Oxidative stress ; Quercus mongolica
descriptionUsing 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.
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descriptionUsing 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.
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abstractUsing 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.
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doi10.1007/s11738-009-0415-z
pages375-385
date2010-03