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Does CO 2 ameliorate phytotoxic effects of O 3 ? A study case on their interactive effects on physiology, and yield of potato (Solanum tuberosumL. Cv. Kara) plants

Does CO 2 ameliorate phytotoxic effects of O 3 ? A study case on their interactive effects on... Potato (Solanum tuberosum L. cv. Kara) was grown in Open‐Top Chambers (OTCs) in Northern Egypt at ambient (ca 350 ppm) or doubled CO 2 (ca 690 ppm) either in charcoal‐filtered air (15 nl l‐1) or in non‐filtered ambient air (78 nll‐1 O 3 ) to investigate the changes in physiology and yield under long‐term elevated CO 2 and/or O 3 throughout 100 days. Ambient O 3 level reduced net photosynthetic rates, number and weight of tubers by 18 per cent, 41 per cent and 21 per cent, respectively, whereas elevated CO 2 caused the opposite effect where it increased the same parameters by 44 per cent, 37 per cent and 20 per cent, respectively. Significant O 3 x CO 2 interactions were detected. However, O 3 caused an increase in GR and POD by 18 per cent and 35 per cent, respectively, while CO 2 caused an increase in POD only by 46 per cent, and there was no effect of O 3 and/or CO 2 on other enzymes. The results of this study are discussed in relation to predicted atmospheric changes. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png World Journal of Science, Technology and Sustainable Development Emerald Publishing

Does CO 2 ameliorate phytotoxic effects of O 3 ? A study case on their interactive effects on physiology, and yield of potato (Solanum tuberosumL. Cv. Kara) plants

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Publisher
Emerald Publishing
Copyright
Copyright © 2010 Emerald Group Publishing Limited. All rights reserved.
ISSN
2042-5945
DOI
10.1108/20425945201000011
Publisher site
See Article on Publisher Site

Abstract

Potato (Solanum tuberosum L. cv. Kara) was grown in Open‐Top Chambers (OTCs) in Northern Egypt at ambient (ca 350 ppm) or doubled CO 2 (ca 690 ppm) either in charcoal‐filtered air (15 nl l‐1) or in non‐filtered ambient air (78 nll‐1 O 3 ) to investigate the changes in physiology and yield under long‐term elevated CO 2 and/or O 3 throughout 100 days. Ambient O 3 level reduced net photosynthetic rates, number and weight of tubers by 18 per cent, 41 per cent and 21 per cent, respectively, whereas elevated CO 2 caused the opposite effect where it increased the same parameters by 44 per cent, 37 per cent and 20 per cent, respectively. Significant O 3 x CO 2 interactions were detected. However, O 3 caused an increase in GR and POD by 18 per cent and 35 per cent, respectively, while CO 2 caused an increase in POD only by 46 per cent, and there was no effect of O 3 and/or CO 2 on other enzymes. The results of this study are discussed in relation to predicted atmospheric changes.

Journal

World Journal of Science, Technology and Sustainable DevelopmentEmerald Publishing

Published: May 1, 2010

Keywords: Open‐Top Chambers; Potato (Solanum tuberosum); O 3 ; CO 2 ; Photosynthesis; Stomatal Conductance; Antioxidant enzymes; Superoxide Dismutase; Glutathione Reductase; Ascorbate Peroxidase; APX; Guaiacol peroxidase

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