Fig. 7.

Effects of altering the source–sink balance on transpiration efficiency (TE) for maize, sorghum, and pearl millet grown in lysimeters in the field with or without water stress (Exp. 5). Maize cobs and the panicles in sorghum and pearl millet were removed and the plants were grown under either (A) well-watered conditions or (B) under water stress, in which watering was stopped at 59 d after sowing. (For ease of presentation, ‘panicle’ in the figure also refers to ‘cobs’.) Data are means (±SE) of 10 genotypes for maize and pearl millet, and 16 genotypes of sorghum, with five replicate plants being sampled to determine the mean for each genotype. Bars indicating the LSD at P<0.01 for the treatment effect within each species are shown.