Figure 9. Photosynthetic rate and gene expression in response to water stress. Leaf photosynthetic rates (A) of unprotected (UWS) and protected (PWS) plants subjected to water stress for 6 d were measured. The data indicate the means7S.E. (n ¼ 3). Geneexpressionfor L-GalDH, g- TMT and PAL (B) were monitored for unstressed (control) and water-stressed plants grown under unprotective (U) and protective (P) conditions. rRNA was used as a loading standard.