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Elevated CO2 ameliorated oxidative stress induced by elevated O3 in Quercus mongolica

100%

Yan K., Chen W., Zhang G., Xu S., Liu Z., He X., Wang L.

Acta Physiologiae Plantarum

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2010

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tom 32

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nr 2

Using open top chambers, the effects of elevated O₃ (80 nmol mol⁻¹) and elevated CO₂ (700 µmol mol⁻¹), alone and in combination, were studied on young trees of Quercus mongolica. The results showed that elevated O₃ 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 CO₂, indicating that oxidative stress on cell membrane and photosynthesis was ameliorated. After 45 days of exposure, elevated O₃ 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 CO₂ exposure. Furthermore, ascorbate (AsA) and total phenolics contents were not higher in the combined gas treatment than those in elevated O₃ treatment. It indicates that the protective effect of elevated CO₂ against O₃ stress was achieved hardly by enhancing ROS scavenging ability after 45 days of exposure. After 105 days of exposure, elevated O₃ significantly decreased activities of SOD, catalase (CAT, EC 1.11.1.6) and APX and AsA content. Elevated CO₂ suppressed the O₃-induced decrease, which could ameliorate the oxidative stress in some extent. In addition, elevated CO₂ increased total phenolics content in the leaves both under ambient O₃ and elevated O₃ exposure, which might contribute to the protection against O₃-induced oxidative stress as well.

2

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Effect of soil acidification on the formation of Fe-, Al-, and Mn-oxides and the stability of soil aggregates

86%

Rampazzo N., Schwertmann U., Blum W. E. H., Mentler A.

International Agrophysics

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1999

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tom 13

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nr 3

3

Sulphide and oxide ore mineralization at Reptile Ridge, Adelaide Island, West Antarctica

72%

Birkenmajer K., Doktor M., Piestrzynski A.

Bulletin of the Polish Academy of Sciences. Earth Sciences

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1999

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tom 47

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nr 2-3

4

Gaseous loss of oxides of nitrogen from the agricultural nitrogen cycle

58%

Rolston D. E., Venterea R. T.

Nawozy i Nawożenie

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2001

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tom 03

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nr 4[09]

Ograniczanie wyników

1 Acta Physiologiae Plantarum

1 Bulletin of the Polish Academy of Sciences. Earth Sciences

1 International Agrophysics

1 Nawozy i Nawożenie

1 Birkenmajer K.

1 Blum W. E. H.

1 Chen W.

1 Doktor M.

1 He X.

1 Liu Z.

1 Mentler A.

1 Piestrzynski A.

1 Rampazzo N.

1 Rolston D. E.

1 Schwertmann U.

1 Venterea R. T.

1 Wang L.

1 Xu S.

1 Yan K.

1 Zhang G.

1 2010

1 2001

2 1999

Elevated CO2 ameliorated oxidative stress induced by elevated O3 in Quercus mongolica

Effect of soil acidification on the formation of Fe-, Al-, and Mn-oxides and the stability of soil aggregates

Sulphide and oxide ore mineralization at Reptile Ridge, Adelaide Island, West Antarctica

Gaseous loss of oxides of nitrogen from the agricultural nitrogen cycle