Fig. 3. The effect of temperature and sink size on the relation between flag leaf water potential and dry weight per kernel of the five central spikelets at maturity. A, Data from the two experiments presented in Tables 2 and 3. B, Data from the experiment presented in Table 4. Plants held at either 18/13 °C (circles) or at 27/22 °C (triangles) during kernel filling. Solid symbols, Plants with intact ears; open symbols, plants with a reduced number of kernels.