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GrainGenes Reference Report: CRC-32-225

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	[ Hide all but 1 of 28 ] agriculture biomass biomass production carbon carbon dioxide carbon dioxide enrichment chemical composition cultivar drought emergence environment field crops genetic variation growth growth analysis irrigation leaf area leaf area index nitrogen nitrogen content plant composition plant development stem stress stress response tillering water availability water stress

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