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Does Maintaining Green Leaf Area in Sorghum Improve Yield under Drought? I. Leaf Growth and Senescence

^a Hermitage Research Station, Department of Primary Industries, Warwick Queensland 4370, Australia
^b QDPI/CSIRO Agricultural Production Systems Research Unit, Toowoomba Queensland 4350, Australia

View larger version (31K): [in a new window]   Fig. 1 Temporal pattern of fully expanded leaf number and senesced leaf number for sorghum hybrids grown under three water regimes. Anthesis at Day 56 is marked with an arrow. Vertical bars denote LSD (P = 0.05). ND, no water deficit; PFD, postflowering water deficit; TD, terminal water deficit

View larger version (19K): [in a new window]   Fig. 2 Changes in leaf area per plant with thermal time from sowing for sorghum hybrids grown under three water regimes: (a) no water deficit, (b) postflowering water deficit, and (c) terminal water deficit. Anthesis at 660 °Cd is marked with arrows

View larger version (21K): [in a new window]   Fig. 3 Leaf-size distribution for the main effects of (a) water regime and (b) hybrid type. Vertical bars denote LSD (P = 0.05)