Figure 1

A Foliage water content (FWC) of plants from a freeze resistant (FR) and a freeze susceptible (FS) wheat cultivar during 6 wk at 2° C. Five-day seedlings were transplanted one cylinder^-1, each cylinder contained 161 g ODS and maintained at about a Ψ_m of -0.002 MPa for 23 to 25 d of plant growth in the greenhouse at 25°C. Matric potential was adjusted to -0.004 MPa just prior to 2°C exposure, no more water was added. Plants were than transferred to a 2°C chamber for intervals up to 6 wk. Mean foliage water content/foliage fresh weight (g H₂O·g FFW^-1) or FWC for each treatment was from three plants in each of three experiments. Vertical lines on each bar indicate standard error of the mean. B. Cumulative plant water uptake/foliage dry weight (g H₂O·g FDW^-1) or PWU was determined from the same FR and FS wheat plants described in Fig. 1A. PWU was calculated as the weight difference between the total water removed and that evaporated from each cylinder during each 2°C treatment interval. PWU was standardized to FDW of plants. Mean PWU for each treatment was from three plants in each of three experiments. Vertical lines in each bar indicate standard error of the mean.