Effect of UV Radiation and Elevated CO2 on Physiological Attributes of Canola (Brassica napus L.) Grown under Water Deficit Stress
Hamid Reza Tohidi-Moghadam1, Farshad Ghooshchi1, Farshid Jamshidpour1, Hossein Zahedi2
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1Department of Agronomy, Varamin-Pishva Branch, Islamic Azad University, Varamin, Iran
2Department of Agronomy and Plant Breeding, Eslamshahr Branch,
Islamic Azad University, Eslamshahr, Iran
Pol. J. Environ. Stud. 2012;21(5):1417–1427
An experiment was conducted to study the effects of solar UV radiation, UV-B, UV-C radiation, and elevating CO2 on some physiological attributes of two canola cultivars (Brassica napus L.) under complete irrigation or limited irrigation in two continuous years. Generally, elevated CO2 increased leaf-soluble carbohydrates, reducing sugars, glucosinolate, and Fv/Fm ratio while carotenoids and soluble protein were decreased due to elevated CO2. In addition, UV radiation decreased leaf-soluble carbohydrates, reducing sugars, chlorophyll, proline, and Fv/Fm ratio and increased UV absorbing pigments, soluble proteins, and glucosinolate.