Does CO2 ameliorate phytotoxic effects of O3? A study case on their interactive effects on physiology, and yield of potato (Solanum tuberosumL. Cv. Kara) plants
World Journal of Science, Technology and Sustainable Development
ISSN: 2042-5945
Article publication date: 1 May 2010
Abstract
Potato (Solanum tuberosum L. cv. Kara) was grown in Open‐Top Chambers (OTCs) in Northern Egypt at ambient (ca 350 ppm) or doubled CO2 (ca 690 ppm) either in charcoal‐filtered air (15 nl l‐1) or in non‐filtered ambient air (78 nll‐1 O3) to investigate the changes in physiology and yield under long‐term elevated CO2 and/or O3 throughout 100 days. Ambient O3 level reduced net photosynthetic rates, number and weight of tubers by 18 per cent, 41 per cent and 21 per cent, respectively, whereas elevated CO2 caused the opposite effect where it increased the same parameters by 44 per cent, 37 per cent and 20 per cent, respectively. Significant O3 x CO2 interactions were detected. However, O3 caused an increase in GR and POD by 18 per cent and 35 per cent, respectively, while CO2 caused an increase in POD only by 46 per cent, and there was no effect of O3 and/or CO2 on other enzymes. The results of this study are discussed in relation to predicted atmospheric changes.
Keywords
Citation
Hassan, I.A. (2010), "Does CO2 ameliorate phytotoxic effects of O3? A study case on their interactive effects on physiology, and yield of potato (Solanum tuberosumL. Cv. Kara) plants", World Journal of Science, Technology and Sustainable Development, Vol. 7 No. 2, pp. 163-174. https://doi.org/10.1108/20425945201000011
Publisher
:Emerald Group Publishing Limited
Copyright © 2010, Emerald Group Publishing Limited