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GrainGenes Reference Report: CRC-32-225

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Reference
CRC-32-225
Title
The effect of elevated CO SUB 2 and drought on the vegetative growth and development of durum wheat ( Triticum durum Desf.) cultivars
Journal
Cereal Research Communications
Year
2004
Volume
32
Pages
225-232
Author
Kaddour AA
Fuller MP
Abstract
Three Syrian registered cultivars of durum wheat ( Triticum durum , Cham 1, 3 and 5) were grown in controlled environments under ambient (400 ppmv) and elevated (1000 ppmv) CO SUB 2 at two levels of water availability (well irrigated and water stressed). All cultivars responded in a similar manner to both the CO SUB 2 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 CO SUB 2 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 leaf area index, which was unaffected by CO SUB 2 but reduced by water stress. Nitrogen content of leaves were unaffected by elevated CO SUB 2 but ear and stem N percentage was significantly improved in contrast to previous reports. These results indicate that higher atmospheric levels of CO SUB 2 would be beneficial to durum wheat even in situations where crops are severely water stressed
Keyword
agriculture
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