Abstract
Three Syrian registered cultivars of durum wheat (Cham 1, 3 and 5) were grown in controlled environments under ambient (400 ppmv) and elevated (1000 ppmv) CO2 at two levels of water availability (well irrigated and water stressed). All cultivars responded in a similar manner to both the CO2 and the water stress. Carbon dioxide elevation raised biomass production at ear emergence by approximately 62% in well irrigated treatments. Water stress severely reduced biomass production (by 38%) but elevated CO2 was able to induce a significant yield response in water stressed treatments. Growth analysis demonstrated that biomass improvements were a result of improved tillering and denser leaves and stems rather than LAI which was unaffected by CO2but depressed by water stress. Nitrogen content of leaves were unaffected by elevated CO2 but ear and stem N% was significantly improved in contrast to previous reports. These results indicate that higher atmospheric levels of CO2 would give a benefit in durum wheat even in situations where crops are severely water stressed.
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Kaddour, A.A., Fuller, M.P. The Effect of Elevated CO2 and Drought on the Vegetative Growth and Development of Durum Wheat (Triticum durum Desf.) Cultivars. CEREAL RESEARCH COMMUNICATIONS 32, 225–232 (2004). https://doi.org/10.1007/BF03543303
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DOI: https://doi.org/10.1007/BF03543303