Plant Soil Environ., 2009, 55(10):443-453 | DOI: 10.17221/1024-PSE

UV radiation, elevated CO2 and water stress effect on growth and photosynthetic characteristics in durum wheat

H.R. Balouchi1, S.A.M.M. Sanavy1, Y. Emam2, A. Dolatabadian1
1 Department of Agronomy, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
2 Department of Agronomy, Faculty of Agriculture, Shiraz University, Shiraz, Iran

Climate change studies are of considerable interest in agriculture and environmental science. The objective of this research was to investigate the changes in photosynthetic pigments and other physiological and biochemical traits of durum wheat exposed to ultraviolet A, B and C radiation, elevated CO2 and water stress. The results showed that carotenoids, anthocyanins, flavonoids and proline content increased significantly by decreasing ultraviolet wavelength compared to control. Elevated CO2 increased only height and specific leaf area. Water stress induced a significant increase in carotenoids, anthocyanins, flavonoids, proline and protein content. Interaction of UV-C and water stress in ambient CO2 increased UV screen pigments and proline content, while under elevated CO2 these increments were alleviated. Interaction among UV-C radiation, elevated CO2 and water stress demonstrated a significant decrease in Fv/Fm, chlorophyll, protein, carbohydrates and specific leaf area compared to control. The results of this experiment illustrate that increased UV radiation and water stress induces an increase of screen pigments and elevated CO2 prevents accumulation of these pigments.

Keywords: carbon dioxide; pigments; ultraviolet; water stress; wheat

Published: October 31, 2009  Show citation

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Balouchi HR, Sanavy SAMM, Emam Y, Dolatabadian A. UV radiation, elevated CO2 and water stress effect on growth and photosynthetic characteristics in durum wheat. Plant Soil Environ. 2009;55(10):443-453. doi: 10.17221/1024-PSE.
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