Effect of UV Radiation and Evaluated CO2 on Morphological Traits, Yield and Yield Components of Canola (Brassica napus L.) Grown under Water Deficit Stress

  • Hamid Reza TOHIDI MOGHADAM Islamic Azad University, Varamin- Pishva Branch, Tehran
  • Farshad GHOOSHCHI Islamic Azad University, Varamin- Pishva Branch, Tehran
  • Hossein ZAHEDI Islamic Azad University, Islamshahr Branch, Tehran

Abstract

In this study, we studied the combined effects of UV radiation, CO2 and water stress on the morphological traits, yield and yield components of canola (Brassica napus cv. ‘Okapi’ and ‘Talaye’) under twelve growth conditions: complete irrigation with ambient CO2 with UV-A (control), complete irrigation with ambient CO2 with UV-B, complete irrigation with ambient CO2 with UV-C, limited irrigation with ambient CO2 with UV-A, limited irrigation with ambient CO2 with UV-B, limited irrigation with ambient CO2 with UV-C, complete irrigation with elevated CO2 with UV-A, complete irrigation with elevated CO2 with UV-B, complete irrigation with elevated CO2 with UV-C, limited irrigation with elevated CO2 with UV-A, limited irrigation with elevated CO2 with UV-B and limited irrigation with elevated CO2 with UV-C. The results showed that water stress significantly decreased all of traits except for the oil percentage. Additionally, an elevated level of CO2 significantly increased the final yield, 1000-seed weight, oil yield, plant height, specific leaf area and number of branches per plant, whereas UV radiation decreased all of the traits in this experiment. Elevated CO2 ameliorated the adverse effects of UV radiation in the final yield, seed weight, oil percentage, oil yield, plant height, specific leaf area and number of branches per plant. This study showed that elevated CO2 can partially ameliorate some of the adverse effects of UV radiation in canola plants. Furthermore, in this study, we observed that the increase in the yield was due to the increase in the seed weight and number of branches caused by elevated CO2 in canola plants. In addition, the maximum yield was obtained from the ‘Talaye’ cultivar under conditions of sunlight, full irrigation and elevated CO2.

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Author Biographies

Hamid Reza TOHIDI MOGHADAM, Islamic Azad University, Varamin- Pishva Branch, Tehran
PhD Plant Physiology Assistant Professor Faculty member Azad University-Iran
Hossein ZAHEDI, Islamic Azad University, Islamshahr Branch, Tehran
Dr.Hossein Zahedi PhD Plant Physiology Assistant Professor Faculty member Azad University-Iran
Published
2011-05-30
How to Cite
TOHIDI MOGHADAM, H. R., GHOOSHCHI, F., & ZAHEDI, H. (2011). Effect of UV Radiation and Evaluated CO2 on Morphological Traits, Yield and Yield Components of Canola (Brassica napus L.) Grown under Water Deficit Stress. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 39(1), 213-219. https://doi.org/10.15835/nbha3915534
Section
Research Articles